GB/T 5758-2001 Determination of particle size, effective particle size and uniformity coefficient of ion exchange resins
Some standard content:
GB/T5758-2001
This standard is a revision of GB/T57581986 "Method for Determination of Particle Size Distribution of Ion Exchange Resins". The main technical differences between this standard and GB/T5758-1986 are: the determination of particle size has been added, and the concepts of effective particle size and uniformity coefficient have been revised; detailed descriptions of the determination steps have been added:
The calculation method of the allowable difference in the original standard has been revised. Appendix A of this standard is a prompt appendix.
This standard will replace GB/T5758-1986 from the date of implementation. This standard is proposed by the State Power Corporation of the People's Republic of China. This standard is under the jurisdiction of the Plastic Resin Products Branch of the National Plastic Standardization Technical Committee (TC15/SC4). The main drafting unit of this standard is the Thermal Engineering Research Institute of the State Power Corporation. The main drafters of this standard are Shao Lin, Wang Guangzhu, and Wang Deliang. This standard is entrusted to the Thermal Engineering Research Institute of the State Power Corporation for interpretation. 247
1 Range
National Standard of the People's Republic of China
Determination for particle size range, effective size anauniformity coefficient of ion exchange resinsGB/T5758—2001
Generation GB/T5758—1986
This standard specifies the determination method for particle size range, effective size anauniformity coefficient of wet ion exchange resins: applicable to the determination of particle size, effective particle size and uniformity coefficient of spherical ion exchange resins (hereinafter referred to as resins) with a wet true density greater than 1g/. This standard specifies the determination method for particle size, effective particle size and uniformity coefficient of white balls used in floating beds of ion exchangers; applicable to the determination of particle size of white balls used in floating beds of ion exchangers. 2 Referenced Standards
The texts contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T5475-1985 Sampling method for ion exchange resins GB/T6003.1-1997 Metal woven wire mesh test sieve (eqvISO3310-1:1990) 3 Definitions
This standard adopts the following definitions.
3.1 Particle size
3.1.1 Range Particle size runge The volume fraction of the sample particles within the specified particle size range (smaller than the upper limit particle size to greater than and equal to the lower limit particle size) to the total sample particle volume.
3. 1. 2 Particle size at pointed lower screen The volume fraction of the sample particles smaller than the specified lower particle size accounts for the volume fraction of all the sample particles. 3. 1. 3 Particle size at pointed upper screen The volume fraction of the sample particles larger than the specified upper particle size accounts for the volume fraction of all the sample particles. 3.2 Effective size
Assume that the sample particles are arranged in descending order until 90% of the volume of the particles are arranged, and the diameter of the smallest particle is defined as the effective particle size, represented by the symbol ds (unit: mm).
3. 3 Uniformity coefficient Assume that the sample particles are arranged in descending order of diameter until 40% of the volume of the particles are arranged, and the diameter of the smallest particle is d4 (unit: mm), and the ratio of the specified and effective particle diameters is its uniformity coefficient. Approved by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China on August 28, 2001 218
Implementation on March 1, 2002
4 Principle
4.1 Particle size determination
GB/T 5758--2001
4.1.1 Determination of range particle size: Use a sieve corresponding to the upper and lower limits of the specified particle size range for screening. The percentage of the volume of the sample between the two sieves to the volume of all sample particles represents the range particle size. 4.1.2 Determination of lower limit particle size: Use a sieve corresponding to the lower limit of the specified particle size range for screening. The percentage of the volume of the sample under the sieve to the volume of all sample particles represents the lower limit particle size. 4.1.3 Determination of upper limit particle size: Use a sieve corresponding to the upper limit of the specified particle size range for screening. The percentage of the volume of the sample on the sieve to the volume of all sample particles represents the upper limit particle size. 4.2 Effective particle size and uniformity coefficient Determination
Sieve the sample with a set of test sieves with decreasing apertures, and draw a curve using the volume fraction of the resin on the sieve and the corresponding aperture; find the aperture corresponding to the volume fraction of the resin on the sieve of 40% and 90% from the curve, and calculate the effective particle size and uniformity coefficient. 5 Reagents
5.1 Pure water: conductivity is less than 5μS/cm (25℃). 5.2 Hydrochloric acid solution [c(HCl)=1mol/L]: measure 84mL of chemically pure hydrochloric acid and dilute to 1000mL. 5.3 Sodium chloride solution [c(NaCl）=1mol/L]: weigh 59g of chemically pure sodium chloride, add a small amount of pure water to dissolve and dilute to 1 000 ml..
5.4 Sodium hydroxide solution [c (NaOH) = 1mol/L]: Weigh 40g of chemically pure sodium hydroxide and add a small amount of pure water to dissolve and dilute to 1 000 mL.
6 Instruments
6.1 Processing device: See Figure 1.
6.2 Test sieve: $200mm×50mm, the sieve hole diameter is 1.40mm, 1.25mm, 1.00mm, 0.900mm, 0.800mm0.710mm.0.630mm.0.500mm.0.450mm, 0.400mm.0.315mm, the quality meets the requirements of GB/T6003.1. 6.3 Screening funnel: As shown in Figure 2, the material is organic glass, and the inner surface of the screening funnel should be smooth and will not hinder the resin particles from sliding down. 6.4 Glass tube: inner diameter of about 8mm, length of 200mm~~400mm. 6.5 Measuring cylinder: 5mL, 10mL, 25ml, 50mL, 100mL, 250ml. 6.6 Porcelain plate or plastic plate: 450mm×500mm. 249
7 Condensate screening
7.1 Sample and its preparation
Group
Periodical inhibition of urine and pancreas
G/T 5758---2001
1 Liquid separation year 2 Sample peel 3 Organic glass exchange column, 4-- Lemon peel pad: 5-- Filter plate: 6 Cold
Figure 1 Processing device
7.1.1 Sampling The sampling method shall be operated in accordance with the provisions of GB/T5475. Unit is mm
7.1.2 Sample pretreatment Sodium-type strong acid cation exchange resin and mature strong basic anion exchange resin samples do not need pretreatment. Pretreatment conditions for weak ion exchange resin are shown in Table 1
Sample pretreatment conditions
Wax type
Resin type
Sample
Treatment bath and amount
Water washing and end point
Weak acid resin
1 mol/1. HCl 500 mL
Alkaline resin
1 mol/LNaOH 500 mL
~10 mL/min
Wash until neutral at a flow rate of ~10mL/min
7.1.3 Sample storage Place the sample treated as above in a 500L wide-mouth bottle, and there should be 2cm-3cm of pure water on the sample. 7.2 Sieving operation procedure for measuring particle size in the range 7.2.1 Sample measurement Slowly insert the glass tube to the bottom of the wide-mouth bottle, take out the sample, and place it in a 100ml250
GB/T5758—2001
graduated cylinder with a small amount of pure water in advance. There should be no bubbles in the resin layer and it should be firm until the resin volume is constant at 100 ml. 7.2.2 Set up the sieving funnel (as shown in Figure 2) and put in an appropriate amount of water (pure water is used for sieving weakly acidic cation exchange resins, and tap water can be used for sieving other resins. The water level should be 1 cm below the upper edge of the sieve frame). $320
Figure 2 Sieving funnel
Unit: mm
7.2.3 Take a sieve with a pore size corresponding to the upper limit particle size and place it in the above funnel. Use water to transfer the sample in the 100mL measuring tube to the sieve; continuously move the sieve up, down, left, and right to make the resin move in the water. During the operation, prevent the resin from floating out from the upper edge of the sieve. The sieve should not leave the water surface. Continue the operation for about 5 minutes; if the mesh of the sieve is basically blocked by resin particles, stop screening and continue screening after cleaning the net. 7.2.4 The screen should be cleaned frequently during the screening process. When cleaning the screen, take the sieve out of the water, turn it over and place it in a porcelain basin; rinse the screen repeatedly with a thin stream of water to basically flush out the resin particles that are blocked in the screen; continue to screen the washed-out resin. 7.2.5 Repeat the operation as specified in 7.2.3 and 7.2.4. When the screen mesh is basically not blocked or the screen is screened in a porcelain basin with a cleaned sieve, and the number of resin particles screened out is less than 50, it can be judged that the screening is clean. Otherwise, continue the operation of 7.2.5 until the screening is clean. 7.2.6 After all the resin in the funnel has settled, collect the resin from the bottom of the funnel into a suitable measuring cylinder. There should be no bubbles in the resin layer. After it is solid, read the volume of the resin under the screen and record it as VI. 7.2.7 Take a sieve with a pore size corresponding to the lower limit particle size, operate according to 7.2.3 to 7.2.6, and record the volume of resin in the measuring cylinder, which is recorded as V2. 7.3 Sieving operation procedures for determining the lower limit particle size 7.3.1 Sample measurement and funnel setting According to 7.2.1, measure 100 mL of sample and set up the funnel according to 7.2.2; 7.3.2 Take a sieve with a pore size corresponding to the lower limit particle size, operate according to 7.2.3 to 7.2.6, and record the volume of resin in the measuring cylinder, which is recorded as V3. 7.4 Sieving operation procedures for determining the upper limit particle size 7.4.1 Sample measurement and funnel setting: According to 7.2.1, measure 100 ml of sample and set up the sieving funnel according to 7.2.2. 7.4.2 Take a sieve with a pore size corresponding to the upper limit particle size, operate according to 7.2.3 to 7.2.6, and record the volume of resin in the measuring cylinder, which is recorded as V. 。 7.5 Sieving operation procedure for determining effective particle size and uniformity coefficient 7.5.1 Sample measurement and funnel setting According to 7.2.1, measure 100 mL of sample and set up the funnel according to 7.2.2. 7.5.2 Estimate the sieve aperture according to the sample particle size. The first sieve aperture should allow 90% of the sample to pass through. Then use a sieve with a smaller aperture to sieve until the volume of resin collected under the last sieve is less than 5 ml. Generally, each sample is sieved through five sieves.
GB/T 5758—2001
7.5.3 The sieving operation method for each sieve is carried out according to 7.2.3 to 7.2.6 until the volume of resin collected under the sieve is less than 5 ml.
8 Dry sieving
8.1 Sampling
The sampling method shall be carried out in accordance with GB/T5475. 8.2 Sieving operation procedure
8.2.1 Sample measurement
Put the sample in a 100mL measuring tube and tap it until the sample volume is constant at 100mL. 8.2.2 Take a sieve with an aperture corresponding to the upper limit particle size and sieve the above 100mL sample in a porcelain plate (A plate). Move the sieve forward, backward, left and right. During the operation, prevent the sample from jumping out of the upper edge of the sieve; if the mesh of the sieve is basically blocked by the sample particles, stop sieving, place the sample on the sieve in another porcelain plate (B plate), and turn the sieve over and use a brush to clean the sample particles in the mesh into the B plate. When the mesh is basically clean, continue to sieve the sample in the B plate in the A plate. If the mesh of the sieve is not blocked or if the sample particles under the sieve are less than 50 when the sieve is sieved with a clean sieve in another porcelain plate (plate C), it can be judged that the sieve is clean; otherwise, continue to sieving until it is clean. Collect the sample under the sieve in plate A in a measuring cylinder and compact it until the sample volume is constant. The read volume is recorded as V5. 8.2.3 Take a sieve with a pore size corresponding to the lower limit particle size and sieve the above sample under the sieve according to the method in 8.2.2. After the sieving is completed, the read volume is recorded as Vg.
9 Representation of results
9.1 Representation of wet test results
9.1.1 Calculation of range particle size
The range particle size is calculated according to formula (1):
Vz— Vi
×100%
Wherein P is the range of particle size;
V,——the volume of the sample under the first screening, mL; V2” is the volume of the sample under the second screening, mL. 9.1.2 Calculation of lower limit particle size
The lower limit particle size is calculated according to formula (2):
Wherein: F--lower limit particle size;
V--the volume of the sample under the screen, mL.
9.1.3 Calculation of upper limit particle size
The upper limit particle size is calculated according to formula (3):
Wherein: P2--upper limit particle size;
V---the volume of the sample under the screen, ml.
9.1.4 Expression of effective particle size and mean coefficient
X 100%
P. =- 100 =× 100%
（1）
（2）
（3）
9.1.4.7 The screening results are listed in a table (see Appendix A). 9.1.4.2 The volume of the resin on the sieve of this sieve is taken as the volume of the sample (100ml) minus the volume of the resin under the sieve, and the volume of the resin on the sieve is taken as the volume of the resin on the sieve. 5758—2001
fraction as the horizontal axis, and the sieve hole diameter as the vertical axis to draw the particle size distribution curve (see Appendix A). 9.1.4.3 Find out the sieve hole diameter at which the volume fraction of the sieve resin is 90%, which is the effective particle size dg, mm 9.1.4.4 Find out the sieve hole diameter at which the volume fraction of the sieve resin is 40%, which is d40, mm. And use the ratio of d4a and dg to express the uniformity coefficient:
In the formula: K-uniformity coefficient.
9.2 Expression of particle size in the range of thousands of samples||tt| |The range particle size of the dry sample is calculated according to formula (5):
Where: . Range particle size,
. Volume of the sample under the first sieving, mL, V. Volume of the sample under the second sieving, mL. 10 Allowable difference
10.1 Allowable difference of particle size
10.1.1 Allowable difference of range particle size
Indoor repeatability r (%) m9.600.094×pInter-laboratory reproducibility R (%) 46.57-0.460×P×100%
Where: P---range The measured value of particle size is in the range of 90% to 100%. 10.1.2 The allowable difference between the lower limit particle size and the upper limit particle size Indoor repeatability r%）m0.4860.064×P Inter-laboratory reproducibility R(%)m1.896-+0.076×P Where: P The measured value of the lower limit particle size and the upper limit particle size is in the range of 0-40%. 10.2 The allowable difference of effective particle size
Indoor repeatability r0.010mm, inter-laboratory reproducibility R=0.024mm 10.3 The allowable difference of mean coefficient
Indoor repeatability rm0.03Inter-laboratory reproducibility R=m0.08.11Test report
The test report should include the following items:
a) Reference to this standard:
b) Complete identification of the tested product: including product name, model, grade, manufacturer name, trademark, etc.:c) Range particle size, %,
d) Upper limit particle size, %,
e) Lower limit particle size, %,
) Effective particle size, mm
Name) Uniform coefficient;
h) Tester and test date.
GB/T5758---2001
(Suggested Appendix)
Example of determination of effective particle size and uniformity coefficient of ion exchange resin The screening determination results of a certain ion exchange resin sample are shown in Table A1. Table A1 Results of sieving and condensation of ion exchange resin samples Serial number
Sieve hole diameter
Volume of resin under the sieve
Volume of resin on the sieve
A2 According to Table A1, a curve is drawn on the coordinate paper with the pore diameter as the ordinate and the volume fraction of resin on the sieve as the abscissa, as shown in Figure A1.
Volume fraction of resin on the sieve,
Particle size distribution curve
A3 Effective particle size and uniformity coefficient
From Figure A1, d. and dso are 0.610mm and 0.445mm respectively, so the effective particle size is 0.445mm, and the uniformity coefficient K is: K2 Take a sieve with a pore size corresponding to the lower limit particle size, operate according to 7.2.3 to 7.2.6, record the volume of the resin in the measuring tube, and record it as V3. 7.4 Sieving operation procedure for determining the upper limit particle size 7.4.1 Sample measurement and funnel setting: Measure 100 ml of sample according to 7.2.1 and set up the sieving funnel according to 7.2.2. 7.4.2 Take a sieve with a pore size corresponding to the upper limit particle size, operate according to 7.2.3 to 7.2.6, record the volume of the resin in the measuring tube, and record it as V. 7.5 Sieving operation procedure for determining the effective particle size and uniformity coefficient 7.5.1 Sample measurement and funnel setting Measure 100 mL of sample according to 7.2.1 and set up the funnel according to 7.2.2. 7.5.2 Estimate the sieve aperture according to the sample particle size. The first sieve aperture should allow 90% of the sample to pass through. Then use a sieve with a smaller aperture until the volume of resin collected under the last sieve is less than 5ml. Generally, each sample is screened through five sieves of 251.
GB/T 5758—2001
7.5.3 The screening operation method for each sieve is carried out in accordance with 7.2.3 to 7.2.6 until the volume of resin collected under the sieve is less than 5ml.
8 Dry sieving
8.1 Sampling
The sampling method is carried out in accordance with GB/T5475. 8.2 Sieving operation procedure
8.2.1 Sample measurement
Place the sample in a 100mL measuring tube and tap it until the sample volume is constant at 100mL. 8.2.2 Take a sieve with a pore size corresponding to the upper limit particle size and sieve the above 100mL sample in a porcelain plate (plate A). Move the sieve forward, backward, left and right, and prevent the sample from jumping out of the upper edge of the sieve during operation; if the mesh of the sieve is basically blocked by sample particles, the sieving should be stopped, and the sample on the sieve should be placed in another porcelain plate (plate B), and the sieve should be turned over and the sample particles in the mesh should be cleaned into plate B with a brush. When the mesh is basically cleaned, continue to sieve the sample in plate B in plate A. If the mesh of the sieve is basically not blocked or the sieve is sieved with a cleaned sieve in another porcelain plate (plate C), and the sample particles sieved out are less than 50 particles, it can be judged that the sieving is clean; otherwise, the sieving should be continued until the sieving is clean. Collect the sample under the sieve in the A plate in a measuring cylinder and compact it until the sample volume is constant. The read volume is recorded as V5. 8.2.3 Take a sieve with a pore size corresponding to the lower limit particle size and sieve the above sample under the sieve according to the method in 8.2.2. After the sieving is completed, the read volume is recorded as Vg.
9 Result expression
9.1 Expression of wet state test results
9.1.1 Calculation of range particle size
The range particle size is calculated according to formula (1):
Vz— Vi
×100%
Wherein P is the range of particle size;
V,——the volume of the sample under the first screening, mL; V2” is the volume of the sample under the second screening, mL. 9.1.2 Calculation of lower limit particle size
The lower limit particle size is calculated according to formula (2):
Wherein: F--lower limit particle size;
V--the volume of the sample under the screen, mL.
9.1.3 Calculation of upper limit particle size
The upper limit particle size is calculated according to formula (3):
Wherein: P2--upper limit particle size;
V---the volume of the sample under the screen, ml.
9.1.4 Expression of effective particle size and mean coefficient
X 100%
P. =- 100 =× 100%
（1）
（2）
（3）
9.1.4.7 The screening results are listed in a table (see Appendix A). 9.1.4.2 The volume of the resin on the sieve of this sieve is taken as the volume of the sample (100ml) minus the volume of the resin under the sieve, and the volume of the resin on the sieve is taken as the volume of the resin on the sieve. 5758—2001
fraction as the horizontal axis, and the sieve hole diameter as the vertical axis to draw the particle size distribution curve (see Appendix A). 9.1.4.3 Find out the sieve hole diameter at which the volume fraction of the sieve resin is 90%, which is the effective particle size dg, mm 9.1.4.4 Find out the sieve hole diameter at which the volume fraction of the sieve resin is 40%, which is d40, mm. And use the ratio of d4a and dg to express the uniformity coefficient:
In the formula: K-uniformity coefficient.
9.2 Expression of particle size in the range of thousands of samples||tt| |The range particle size of the dry sample is calculated according to formula (5):
Where: . Range particle size,
. Volume of the sample under the first sieving, mL, V. Volume of the sample under the second sieving, mL. 10 Allowable difference
10.1 Allowable difference of particle size
10.1.1 Allowable difference of range particle size
Indoor repeatability r (%) m9.600.094×pInter-laboratory reproducibility R (%) 46.57-0.460×P×100%
Where: P---range The measured value of particle size is in the range of 90% to 100%. 10.1.2 The allowable difference between the lower limit particle size and the upper limit particle size Indoor repeatability r%）m0.4860.064×P Inter-laboratory reproducibility R(%)m1.896-+0.076×P Where: P The measured value of the lower limit particle size and the upper limit particle size is in the range of 0-40%. 10.2 The allowable difference of effective particle size
Indoor repeatability r0.010mm, inter-laboratory reproducibility R=0.024mm 10.3 The allowable difference of mean coefficient
Indoor repeatability rm0.03Inter-laboratory reproducibility R=m0.08.11Test report
The test report should include the following items:
a) Reference to this standard:
b) Complete identification of the tested product: including product name, model, grade, manufacturer name, trademark, etc.:c) Range particle size, %,
d) Upper limit particle size, %,
e) Lower limit particle size, %,
) Effective particle size, mm
Name) Uniform coefficient;
h) Tester and test date.
GB/T5758---2001
(Suggested Appendix)
Example of determination of effective particle size and uniformity coefficient of ion exchange resin The screening determination results of a certain ion exchange resin sample are shown in Table A1. Table A1 Results of sieving and condensation of ion exchange resin samples Serial number
Sieve hole diameter
Volume of resin under the sieve
Volume of resin on the sieve
A2 According to Table A1, a curve is drawn on the coordinate paper with the pore diameter as the ordinate and the volume fraction of resin on the sieve as the abscissa, as shown in Figure A1.
Volume fraction of resin on the sieve,
Particle size distribution curve
A3 Effective particle size and uniformity coefficient
From Figure A1, d. and dso are 0.610mm and 0.445mm respectively, so the effective particle size is 0.445mm, and the uniformity coefficient K is: K2 Take a sieve with a pore size corresponding to the lower limit particle size, operate according to 7.2.3 to 7.2.6, record the volume of the resin in the measuring tube, and record it as V3. 7.4 Sieving operation procedure for determining the upper limit particle size 7.4.1 Sample measurement and funnel setting: Measure 100 ml of sample according to 7.2.1 and set up the sieving funnel according to 7.2.2. 7.4.2 Take a sieve with a pore size corresponding to the upper limit particle size, operate according to 7.2.3 to 7.2.6, record the volume of the resin in the measuring tube, and record it as V. 7.5 Sieving operation procedure for determining the effective particle size and uniformity coefficient 7.5.1 Sample measurement and funnel setting Measure 100 mL of sample according to 7.2.1 and set up the funnel according to 7.2.2. 7.5.2 Estimate the sieve aperture according to the sample particle size. The first sieve aperture should allow 90% of the sample to pass through. Then use a sieve with a smaller aperture until the volume of resin collected under the last sieve is less than 5ml. Generally, each sample is screened through five sieves of 251.
GB/T 5758—2001
7.5.3 The screening operation method for each sieve is carried out in accordance with 7.2.3 to 7.2.6 until the volume of resin collected under the sieve is less than 5ml.
8 Dry sieving
8.1 Sampling
The sampling method is carried out in accordance with GB/T5475. 8.2 Sieving operation procedure
8.2.1 Sample measurement
Place the sample in a 100mL measuring tube and tap it until the sample volume is constant at 100mL. 8.2.2 Take a sieve with a pore size corresponding to the upper limit particle size and sieve the above 100mL sample in a porcelain plate (plate A). Move the sieve forward, backward, left and right, and prevent the sample from jumping out of the upper edge of the sieve during operation; if the mesh of the sieve is basically blocked by sample particles, the sieving should be stopped, and the sample on the sieve should be placed in another porcelain plate (plate B), and the sieve should be turned over and the sample particles in the mesh should be cleaned into plate B with a brush. When the mesh is basically cleaned, continue to sieve the sample in plate B in plate A. If the mesh of the sieve is basically not blocked or the sieve is sieved with a cleaned sieve in another porcelain plate (plate C), and the sample particles sieved out are less than 50 particles, it can be judged that the sieving is clean; otherwise, the sieving should be continued until the sieving is clean. Collect the sample under the sieve in the A plate in a measuring cylinder and compact it until the sample volume is constant. The read volume is recorded as V5. 8.2.3 Take a sieve with a pore size corresponding to the lower limit particle size and sieve the above sample under the sieve according to the method in 8.2.2. After the sieving is completed, the read volume is recorded as Vg.
9 Result expression
9.1 Expression of wet state test results
9.1.1 Calculation of range particle size
The range particle size is calculated according to formula (1):
Vz— Vi
×100%
Wherein P is the range of particle size;
V,——the volume of the sample under the first screening, mL; V2” is the volume of the sample under the second screening, mL. 9.1.2 Calculation of lower limit particle size
The lower limit particle size is calculated according to formula (2):
Wherein: F--lower limit particle size;
V--the volume of the sample under the screen, mL.
9.1.3 Calculation of upper limit particle size
The upper limit particle size is calculated according to formula (3):
Wherein: P2--upper limit particle size;
V---the volume of the sample under the screen, ml.
9.1.4 Expression of effective particle size and mean coefficient
X 100%www.bzxz.net
P. =- 100 =× 100%
（1）
（2）
（3）
9.1.4.7 The screening results are listed in a table (see Appendix A). 9.1.4.2 The volume of the resin on the sieve of this sieve is taken as the volume of the sample (100ml) minus the volume of the resin under the sieve, and the volume of the resin on the sieve is taken as the volume of the resin on the sieve. 5758—2001
fraction as the horizontal axis, and the sieve hole diameter as the vertical axis to draw the particle size distribution curve (see Appendix A). 9.1.4.3 Find out the sieve hole diameter at which the volume fraction of the sieve resin is 90%, which is the effective particle size dg, mm 9.1.4.4 Find out the sieve hole diameter at which the volume fraction of the sieve resin is 40%, which is d40, mm. And use the ratio of d4a and dg to express the uniformity coefficient:
In the formula: K-uniformity coefficient.
9.2 Expression of particle size in the range of thousands of samples||tt| |The range particle size of the dry sample is calculated according to formula (5):
Where: . Range particle size,
. Volume of the sample under the first sieving, mL, V. Volume of the sample under the second sieving, mL. 10 Allowable difference
10.1 Allowable difference of particle size
10.1.1 Allowable difference of range particle size
Indoor repeatability r (%) m9.600.094×pInter-laboratory reproducibility R (%) 46.57-0.460×P×100%
Where: P---range The measured value of particle size is in the range of 90% to 100%. 10.1.2 The allowable difference between the lower limit particle size and the upper limit particle size Indoor repeatability r%）m0.4860.064×P Inter-laboratory reproducibility R(%)m1.896-+0.076×P Where: P The measured value of the lower limit particle size and the upper limit particle size is in the range of 0-40%. 10.2 The allowable difference of effective particle size
Indoor repeatability r0.010mm, inter-laboratory reproducibility R=0.024mm 10.3 The allowable difference of mean coefficient
Indoor repeatability rm0.03Inter-laboratory reproducibility R=m0.08.11Test report
The test report should include the following items:
a) Reference to this standard:
b) Complete identification of the tested product: including product name, model, grade, manufacturer name, trademark, etc.:c) Range particle size, %,
d) Upper limit particle size, %,
e) Lower limit particle size, %,
) Effective particle size, mm
Name) Uniform coefficient;
h) Tester and test date.
GB/T5758---2001
(Suggested Appendix)
Example of determination of effective particle size and uniformity coefficient of ion exchange resin The screening determination results of a certain ion exchange resin sample are shown in Table A1. Table A1 Results of sieving and condensation of ion exchange resin samples Serial number
Sieve hole diameter
Volume of resin under the sieve
Volume of resin on the sieve
A2 According to Table A1, a curve is drawn on the coordinate paper with the pore diameter as the ordinate and the volume fraction of resin on the sieve as the abscissa, as shown in Figure A1.
Volume fraction of resin on the sieve,
Particle size distribution curve
A3 Effective particle size and uniformity coefficient
From Figure A1, d. and dso are 0.610mm and 0.445mm respectively, so the effective particle size is 0.445mm, and the uniformity coefficient K is: K2 Take a sieve with the same aperture as the upper limit particle size and sieve the above 100mL sample in a porcelain plate (plate A). Move the sieve forward, backward, left and right. Prevent the sample from jumping out of the upper edge of the sieve during operation. If the mesh of the sieve is basically blocked by the sample particles, stop sieving, place the sample on the sieve in another porcelain plate (plate B), and turn the sieve over and use a brush to clean the sample particles in the mesh into plate B. When the mesh is basically clean, continue to sieve the sample in plate B in plate A. If the mesh of the sieve is basically not blocked or the sieve is sieved in another porcelain plate (plate C) with a cleaned sieve, and the sample particles sieved are less than 50, it can be judged that the sieving is clean; otherwise, continue sieving until the sieving is clean. Collect the sieved sample in plate A in a measuring cylinder and compact it until the sample volume is constant. The read volume is recorded as V5. 8.2.3 Take a sieve with the same aperture as the lower limit particle size and sieve the above sieved sample according to the method in 8.2.2. After sieving, the volume is read and recorded as Vg.
9 Result expression
9.1 Expression of wet state measurement results
9.1.1 Calculation of range particle size
The range particle size is calculated according to formula (1):
Vz— Vi
×100%
Wherein P is the range of particle size;
V,——the volume of the sample under the first screening, mL; V2” is the volume of the sample under the second screening, mL. 9.1.2 Calculation of lower limit particle size
The lower limit particle size is calculated according to formula (2):
Wherein: F--lower limit particle size;
V--the volume of the sample under the screen, mL.
9.1.3 Calculation of upper limit particle size
The upper limit particle size is calculated according to formula (3):
Wherein: P2--upper limit particle size;
V---the volume of the sample under the screen, ml.
9.1.4 Expression of effective particle size and mean coefficient
X 100%
P. =- 100 =× 100%
（1）
（2）
（3）
9.1.4.7 The screening results are listed in a table (see Appendix A). 9.1.4.2 The volume of the resin on the sieve of this sieve is taken as the volume of the sample (100ml) minus the volume of the resin under the sieve, and the volume of the resin on the sieve is taken as the volume of the resin on the sieve. 5758—2001
fraction as the horizontal axis, and the sieve hole diameter as the vertical axis to draw the particle size distribution curve (see Appendix A). 9.1.4.3 Find out the sieve hole diameter at which the volume fraction of the sieve resin is 90%, which is the effective particle size dg, mm 9.1.4.4 Find out the sieve hole diameter at which the volume fraction of the sieve resin is 40%, which is d40, mm. And use the ratio of d4a and dg to express the uniformity coefficient:
In the formula: K-uniformity coefficient.
9.2 Expression of particle size in the range of thousands of samples||tt| |The range particle size of the dry sample is calculated according to formula (5):
Where: . Range particle size,
. Volume of the sample under the first sieving, mL, V. Volume of the sample under the second sieving, mL. 10 Allowable difference
10.1 Allowable difference of particle size
10.1.1 Allowable difference of range particle size
Indoor repeatability r (%) m9.600.094×pInter-laboratory reproducibility R (%) 46.57-0.460×P×100%
Where: P---range The measured value of particle size is in the range of 90% to 100%. 10.1.2 The allowable difference between the lower limit particle size and the upper limit particle size Indoor repeatability r%）m0.4860.064×P Inter-laboratory reproducibility R(%)m1.896-+0.076×P Where: P The measured value of the lower limit particle size and the upper limit particle size is in the range of 0-40%. 10.2 The allowable difference of effective particle size
Indoor repeatability r0.010mm, inter-laboratory reproducibility R=0.024mm 10.3 The allowable difference of mean coefficient
Indoor repeatability rm0.03Inter-laboratory reproducibility R=m0.08.11Test report
The test report should include the following items:
a) Reference to this standard:
b) Complete identification of the tested product: including product name, model, grade, manufacturer name, trademark, etc.:c) Range particle size, %,
d) Upper limit particle size, %,
e) Lower limit particle size, %,
) Effective particle size, mm
Name) Uniform coefficient;
h) Tester and test date.
GB/T5758---2001
(Suggested Appendix)
Example of determination of effective particle size and uniformity coefficient of ion exchange resin The screening determination results of a certain ion exchange resin sample are shown in Table A1. Table A1 Results of sieving and condensation of ion exchange resin samples Serial number
Sieve hole diameter
Volume of resin under the sieve
Volume of resin on the sieve
A2 According to Table A1, a curve is drawn on the coordinate paper with the pore diameter as the ordinate and the volume fraction of resin on the sieve as the abscissa, as shown in Figure A1.
Volume fraction of resin on the sieve,
Particle size distribution curve
A3 Effective particle size and uniformity coefficient
From Figure A1, d. and dso are 0.610mm and 0.445mm respectively, so the effective particle size is 0.445mm, and the uniformity coefficient K is: K2 Take a sieve with the same aperture as the upper limit particle size and sieve the above 100mL sample in a porcelain plate (plate A). Move the sieve forward, backward, left and right. Prevent the sample from jumping out of the upper edge of the sieve during operation. If the mesh of the sieve is basically blocked by the sample particles, stop sieving, place the sample on the sieve in another porcelain plate (plate B), and turn the sieve over and use a brush to clean the sample particles in the mesh into plate B. When the mesh is basically clean, continue to sieve the sample in plate B in plate A. If the mesh of the sieve is basically not blocked or the sieve is sieved in another porcelain plate (plate C) with a cleaned sieve, and the sample particles sieved are less than 50, it can be judged that the sieving is clean; otherwise, continue sieving until the sieving is clean. Collect the sieved sample in plate A in a measuring cylinder and compact it until the sample volume is constant. The read volume is recorded as V5. 8.2.3 Take a sieve with the same aperture as the lower limit particle size and sieve the above sieved sample according to the method in 8.2.2. After sieving, the volume is read and recorded as Vg.
9 Result expression
9.1 Expression of wet state measurement results
9.1.1 Calculation of range particle size
The range particle size is calculated according to formula (1):
Vz— Vi
×100%
Wherein P is the range of particle size;
V,——the volume of the sample under the first screening, mL; V2” is the volume of the sample under the second screening, mL. 9.1.2 Calculation of lower limit particle size
The lower limit particle size is calculated according to formula (2):
Wherein: F--lower limit particle size;
V--the volume of the sample under the screen, mL.
9.1.3 Calculation of upper limit particle size
The upper limit particle size is calculated according to formula (3):
Wherein: P2--upper limit particle size;
V---the volume of the sample under the screen, ml.
9.1.4 Expression of effective particle size and mean coefficient
X 100%
P. =- 100 =× 100%
（1）
（2）
（3）
9.1.4.7 The screening results are listed in a table (see Appendix A). 9.1.4.2 The volume of the resin on the sieve of this sieve is taken as the volume of the sample (100ml) minus the volume of the resin under the sieve, and the volume of the resin on the sieve is taken as the volume of the resin on the sieve. 5758—2001
fraction as the horizontal axis, and the sieve hole diameter as the vertical axis to draw the particle size distribution curve (see Appendix A). 9.1.4.3 Find out the sieve hole diameter at which the volume fraction of the sieve resin is 90%, which is the effective particle size dg, mm 9.1.4.4 Find out the sieve hole diameter at which the volume fraction of the sieve resin is 40%, which is d40, mm. And use the ratio of d4a and dg to express the uniformity coefficient:
In the formula: K-uniformity coefficient.
9.2 Expression of particle size in the range of thousands of samples||tt| |The range particle size of the dry sample is calculated according to formula (5):
Where: . Range particle size,
. Volume of the sample under the first sieving, mL, V. Volume of the sample under the second sieving, mL. 10 Allowable difference
10.1 Allowable difference of particle size
10.1.1 Allowable difference of range particle size
Indoor repeatability r (%) m9.600.094×pInter-laboratory reproducibility R (%) 46.57-0.460×P×100%
Where: P---range The measured value of particle size is in the range of 90% to 100%. 10.1.2 The allowable difference between the lower limit particle size and the upper limit particle size Indoor repeatability r%）m0.4860.064×P Inter-laboratory reproducibility R(%)m1.896-+0.076×P Where: P The measured value of the lower limit particle size and the upper limit particle size is in the range of 0-40%. 10.2 The allowable difference of effective particle size
Indoor repeatability r0.010mm, inter-laboratory reproducibility R=0.024mm 10.3 The allowable difference of mean coefficient
Indoor repeatability rm0.03Inter-laboratory reproducibility R=m0.08.11Test report
The test report should include the following items:
a) Reference to this standard:
b) Complete identification of the tested product: including product name, model, grade, manufacturer name, trademark, etc.:c) Range particle size, %,
d) Upper limit particle size, %,
e) Lower limit particle size, %,
) Effective particle size, mm
Name) Uniform coefficient;
h) Tester and test date.
GB/T5758---2001
(Suggested Appendix)
Example of determination of effective particle size and uniformity coefficient of ion exchange resin The screening determination results of a certain ion exchange resin sample are shown in Table A1. Table A1 Results of sieving and condensation of ion exchange resin samples Serial number
Sieve hole diameter
Volume of resin under the sieve
Volume of resin on the sieve
A2 According to Table A1, a curve is drawn on the coordinate paper with the pore diameter as the ordinate and the volume fraction of resin on the sieve as the abscissa, as shown in Figure A1.
Volume fraction of resin on the sieve,
Particle size distribution curve
A3 Effective particle size and uniformity coefficient
From Figure A1, d. and dso are 0.610mm and 0.445mm respectively, so the effective particle size is 0.445mm, and the uniformity coefficient K is: K08.11 Test report
The test report shall include the following items:
a) Reference to this standard:
b) Complete identification of the product under test: including product name, model, grade, manufacturer name, trademark, etc.:c) Range particle size, %,
d) Upper limit particle size, %,
e) Lower limit particle size, %,
) Effective particle size, mm
Name) Uniform coefficient;
h) Tester and test date.
GB/T5758---2001
(Suggested Appendix)
Example of determination of effective particle size and uniformity coefficient of ion exchange resin The screening determination results of a certain ion exchange resin sample are shown in Table A1. Table A1 Results of sieving and condensation of ion exchange resin samples Serial number
Sieve hole diameter
Volume of resin under the sieve
Volume of resin on the sieve
A2 According to Table A1, a curve is drawn on the coordinate paper with the pore diameter as the ordinate and the volume fraction of resin on the sieve as the abscissa, as shown in Figure A1.
Volume fraction of resin on the sieve,
Particle size distribution curve
A3 Effective particle size and uniformity coefficient
From Figure A1, d. and dso are 0.610mm and 0.445mm respectively, so the effective particle size is 0.445mm, and the uniformity coefficient K is: K08.11 Test report
The test report shall include the following items:
a) Reference to this standard:
b) Complete identification of the product under test: including product name, model, grade, manufacturer name, trademark, etc.:c) Range particle size, %,
d) Upper limit particle size, %,
e) Lower limit particle size, %,
) Effective particle size, mm
Name) Uniform coefficient;
h) Tester and test date.
GB/T5758---2001
(Suggested Appendix)
Example of determination of effective particle size and uniformity coefficient of ion exchange resin The screening determination results of a certain ion exchange resin sample are shown in Table A1. Table A1 Results of sieving and condensation of ion exchange resin samples Serial number
Sieve hole diameter
Volume of resin under the sieve
Volume of resin on the sieve
A2 According to Table A1, a curve is drawn on the coordinate paper with the pore diameter as the ordinate and the volume fraction of resin on the sieve as the abscissa, as shown in Figure A1.
Volume fraction of resin on the sieve,
Particle size distribution curve
A3 Effective particle size and uniformity coefficient
From Figure A1, d. and dso are 0.610mm and 0.445mm respectively, so the effective particle size is 0.445mm, and the uniformity coefficient K is: K
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