Some standard content:
National Standard of the People's Republic of China
Water clarifying agent ferric chloride
Water clarifying agent--Ferric chloride subject content and scope of application
GB4482—93
replaces GB4482—84
GB448384
This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of water purification agents anhydrous ferric fluoride and ferric chloride solution.
This standard applies to anhydrous ferric chloride and ferric fluoride solutions prepared by chlorination using iron filings as raw materials. This product is mainly used as a water purifier. Molecular formula: FeCls
Relative molecular mass: 162.21 (according to the 1989 international relative atomic mass) 2 reference standards
GB601
GB602
GB603
Chemical reagent Preparation of standard solutions for titration analysis (volume analysis) Chemical reagents
Preparation of standard solutions for impurity determination
Preparation of preparations and products used in chemical reagent test methods GB610.1
Chemistry General method for determination of arsenic in reagents (arsenic spot method) GB610.2 General method for determination of arsenic in chemical reagents (silver diethyldithiocarbamate method) GB1250
Expression method and judgment method of limit values ??GB6678||tt| |General rules for sampling of chemical products
GB6680￥
General rules for sampling of liquid chemical products
GB6682
Laboratory water specifications
3 product categories
The water purifying agent ferric chloride is divided into two types:
type 1 is anhydrous ferric fluoride;
type I is ferric chloride solution.
4 Technical requirements
4.1 Appearance
Type I should be brown-green crystal; Type I should be red-brown solution. 4.2 The water purification agent ferric chloride should comply with the requirements of Table 1: State Bureau of Technical Supervision approved on 1993-03-03 the 1993-12-01 implementation ||tt| FeCl), content
ferrous chloride (FeCl2) content
insoluble matter content
free acid (calculated as HCI) content
arsenic (As) content|| tt||Lead (Pb) content
5 test methods
Superior product
98.7
0.70
0.50
GB4482--93
Table 1
Type I
First class product
96.0
2.0
1.5
0.002 0||tt ||0.004 0
refers to
qualified product
93.0
3.5
3.0
label
excellent product|| tt||44.0
0.20
0.40
0.25
Type I
First class product
41.0
0.30| |tt||0.40
0.50
0.0020
0.0040
%
Qualified product
38.0
0.40|| tt||0.50
The reagents and water used in this standard, unless other requirements are specified, refer to analytically pure reagents and grade three water specified in GB6682. The standard solutions, impurity standard solutions, preparations and products required in the test shall be prepared in accordance with the provisions of GB601, GB602 and GB603 unless other provisions are noted.
5.1 Determination of ferric chloride content
5.1.1 Method summary
Under acidic conditions, ferric iron reacts with potassium iodide to precipitate iodine, using starch as an indicator and sulfide. Titrate with sodium sulfate standard titration solution. 5.1.2 Reagents and materials
5.1.2.1 Potassium iodide (GB1272);
5.1.2.2 Silver nitrate (GB670) solution: 10g/L; 5.1.2.3 Hydrochloric acid (GB622) solution: 1+1 Solution; 5.1.2.4 Hydrochloric acid (GB622) solution: 1+49 solution 5.1.2.5 Sodium thiosulfate (GB637) standard titration solution: c (NazS2O.) about 0.1mol/L 5.1.2.6 Soluble starch indicator solution: 10g/ L. 5.1.3 Instruments and equipment
General laboratory instruments and
5.1.3.1 type filter: The pore size of the filter plate is 5 ~ 15 μm. 5.1.4 Analysis steps
5.1.4.1 Preparation of test solution
Weigh about 10g Type I sample or 20g Type I sample (about 15mL) in a dry and clean weighing bottle, accurate to 0.001g, transfer into a 250mL beaker. For Type 1 samples, wash the weighing bottle with hydrochloric acid (5.1.2.4) in batches. Put the washing liquid into the beaker containing the sample. Add hydrochloric acid (5.1.2.4) to about 100mL. Stir to dissolve. Dissolve in water at 50±5℃. Keep it warm for 15 minutes; wash the weighing bottle with water for the sample several times, put the washing liquid into the beaker containing the sample, add water to about 100mL, and stir. Use a crucible filter that has been dried to constant weight at 105-110°C to suction filter, and wash the residue with water until the washing liquid does not contain chloride ions (check with silver nitrate solution). Transfer the filtrate and washing liquid into a 500mL volumetric flask, add water to the mark, and shake well to obtain test solution A. Test solution A is used for the determination of ferric chloride and ferrous chloride content. GB4482-93
Retain the crucible and residue for the determination of insoluble matter content. 5.1.4.2 Determination
Use a pipette to transfer 25mL of test solution A (5.1.4.1), place it in a 250mL iodine flask, add 25mL of water, 3g of potassium iodide and 10mL of hydrochloric acid (5.1.2.3), and cover it Cork the bottle, shake well, and place in a dark place for 30 minutes. Titrate with sodium thiosulfate standard titration solution to light yellow, add 3 mL of starch indicator solution, and continue titration until the blue color disappears. Do a blank test at the same time.
5.1.5 Expression of analysis results
The ferric chloride content (X,) expressed as mass percentage is calculated according to formula (1): X, = c: (VV)X0 162 2 × 100 = 324.4c · (V- Vo)
m
Where: c—actual concentration of sodium thiosulfate standard titration solution, mol/L: consumption of sodium thiosulfate standard titration solution during titration Volume, mL; V
V. The volume of sodium thiosulfate standard titration solution consumed in a blank test, mL; m
-the mass of the sample, g;
(1)
0.1622——with 1.00mL sulfur The standard titration solution of sodium sulfate (c(NazS0.) = 1.000mol/L) is equivalent to the mass of ferric chloride expressed in grams.
5.1.6 Allowable difference
Take the arithmetic mean of the parallel measurement results as the measurement result; the absolute difference of the parallel measurement results shall not be greater than 0.2%. 5.2 Determination of ferrous chloride content
5.2.1 Method summary
In sulfuric acid and phosphoric acid medium, use sodium diphenylamine sulfonate as indicator and titrate with potassium dichromate standard titration solution. 5.2.2 Reagents and materials
5.2.2.1 Phosphoric acid (GB1282);
5.2.2.2 Sulfuric acid (GB625) solution: 1+5 solution; 5.2.2.3 Potassium dichromate (GB642) standard titration Solution: c(-K,Cr0,) is about 0.05mol/L, prepared before use. Use a pipette to transfer 100 mL of potassium dichromate standard titration solution prepared and calibrated according to GB601, place it in a 200 mL volumetric flask, dilute to the mark with water, and shake well.
5.2.2.4, sodium diphenylamine sulfonate indicator solution: 5g/L. 5.2.3 Analysis step
Use a pipette to transfer 100mL of test solution A (5.1.4.1), place it in a 250mL Erlenmeyer flask, add 20mL of sulfuric acid, 5mL of phosphoric acid and 3 to 4 drops of sodium diphenylamine sulfonate Indicator solution, titrate with potassium dichromate standard titration solution until it reaches blue-violet color. 5.2.4 Expression of analysis results
The ferrous chloride content (X,) expressed as mass percentage is calculated according to formula (2): X, = C: V× 0. 126 8 ,
63.4cv
/LVwww.bzxz.net
The volume of potassium dichromate standard titration solution consumed in one titration, mL; (2)
m——the mass of the sample, g;
GB4482-93| |tt||0.1268 is equivalent to 1.00mL potassium dichromate standard titration solution Cc(+K,Cr,0,)=1.000mol/L), the mass of ferrous chloride expressed in grams.
5.2.5 Allowable difference
Take the arithmetic mean of the parallel measurement results as the measurement result. The absolute difference of the parallel measurement results is not greater than: 0.1% for Type I first-class products and qualified products, 1 Type 1 premium products and type 1 are 0.02%. 5.3 Determination of insoluble matter content
5.3.1 Instruments and equipment
5.3.1.1 Electric constant temperature drying oven: the temperature can be controlled at 105~110℃. 5.3.2 Analysis steps
Put the crucible and residue retained in 5.1.4.1 into an electric constant temperature drying oven and dry to constant weight at 105~110℃. 5.3.3 Expression of analysis results
The insoluble matter content (X,) expressed as mass percentage is calculated according to formula (3): -The mass of the crucible filter together with the residue, g; where: m1—
-The mass of the filter, g
mz
m-
sample mass, g.
5.3.4 Allowable difference
(3)
Take the arithmetic mean of the parallel measurement results as the measurement result; the absolute difference of the parallel measurement results is not greater than: Type 1 first-class product and qualified products are 0.1%, Type 1 premium products and Type I are 0.02%. 5.4 Determination of free acid content
5.4.1 Method summary
Use sodium fluoride and iron ions to react to generate trisodium hexafluoroferric(I)ate precipitate, filter to remove the iron ions, and take a quantitative filtrate , using phenolphthalein as indicator and titrating with sodium hydroxide standard titration solution. 5.4.2 Reagents and materials
5.4.2.1 Sodium fluoride (GB1264) solution: 40g/L. Weigh 4g of sodium fluoride into a 250mL beaker, add 100mL of water, stir to dissolve, add 2 drops of phenolic acid indicator solution (5.4.2.3), if the solution is colorless, use sodium hydroxide standard titration solution (5.4.2.2) Neutralize until it just turns reddish. If the solution turns red, use hydrochloric acid (1 + 120) solution to drip it until it becomes colorless, and then neutralize with sodium hydroxide standard titration solution until it just turns reddish. 5.4.2.2 Sodium hydroxide (GB629) standard titration solution: c (NaOH) is about 0.05mol/L. 5.4.2.3 Phenol (GB10729) indicator liquid: 10g/L. 5.4.3 Analysis steps
Weigh about 2g of type I sample in a dry and clean weighing bottle, accurate to 0.01g, place a small funnel at the mouth of the 100mL volumetric flask, and move the sample into the volumetric flask. Wash the weighing bottle several times with a small amount of water, wash it and put it into the volumetric flask. Slowly add 80 mL of sodium fluoride solution, add water to the mark, shake well, and leave for 10 minutes. Dry filter with medium-speed filter paper into a dry and clean beaker. Use a pipette to transfer 50 mL of the filtrate into an Erlenmeyer flask. Add 2 drops of phenolphthalein indicator solution and titrate with sodium hydroxide standard titration solution until it becomes slightly red and does not fade in 30 seconds. as the end point. The waste liquid after measurement shall be disposed of in accordance with the provisions of Appendix A. 5.4.4: Expression of analysis results
The free acid (based on HCI) content (X) expressed as mass percentage is calculated according to formula (4): X,
GB4482-93||tt| |C: V× 0. 036 46 × 100 =
m×50
100
Where: c Actual concentration of sodium hydroxide standard titration solution, mol/L, V The volume of the sodium hydroxide standard titration solution consumed in the titration, mL; m
The mass of the sample, g;
7.292cV
m
0.03646--and 1.00 mL sodium hydroxide standard titration solution Cc (NaOH) = 1.000mol/L) is equivalent to the mass of hydrogen chloride expressed in grams
5.4.5 Allowable difference
Take the arithmetic mean of the parallel measurement results It is the measurement result; the absolute difference of parallel measurement results is not greater than 0.05%. 5.5 Determination of arsenic content
5.5.1 Method 1 Arsenic spot method
5.5.1.1 Method summary
(4)
In acidic solution, use potassium iodide and fluorine Stannite reduces As(V) to As(I), adds zinc particles and acts with acid to produce new ecological hydrogen, which further reduces As(I) to arsine, and the hydrogen gas reacts with the mercury bromide test paper. Brownish-yellow spots are produced and visually compared with standard spots. 5.5.1.2 Reagents and materials
5.5.1.2.1 Arsenic-free zinc (GB2304).
5.5.1.2.2 Potassium iodide (GB1272).
5.5.1.2.3 Sulfuric acid (GB625) solution: 1+1 solution. 5.5.1.2.4 Stannous chloride (GB638) hydrochloric acid solution: 400g/L. 5.5.1.2.5 Monument standard solution: 1mL solution contains 0.0100mg arsenic (As). Prepare before use. Use a pipette to transfer 10 mL of arsenic standard solution prepared according to GB602, place it in a 100 mL volumetric flask, add water to the mark, and shake. 5.5.1.2.6 Mercury bromide (GB1398) test paper. 5.5.1.2.7, lead acetate (HG3-974) cotton. 5.5.1.3 Instruments and equipment
General laboratory instruments and
5.5.1.3.1 Monument set: See the provisions of Article 5.2 of GB610.1. 5.5.1.4 Analysis steps
Use a dry and clean weighing bottle to weigh 1.00g of the sample, accurate to 0.01g, place it in the wide-mouth bottle of the arsenic determiner, add water to about 50mL, and dissolve the sample. Add 4 mL of sulfuric acid solution, 1 g of potassium iodide and 2 mL of stannous chloride solution, shake well, and leave for 15 minutes. Add 3g of arsenic-free zinc, immediately plug the glass tube containing lead acetate cotton and mercuric bromide test paper onto the jar, and place it in a dark place for 1 hour. The yellow color of the mercury bromide reagent should not be darker than the standard color.
Preparation of standard stain: Use a pipette to transfer 2 mL of arsenic standard solution, place it in the wide-mouth bottle of the arsenic determiner, and process it in the same manner as the sample at the same time. 5.5.2 Method 2 Silver diethyldithiocarbamate method (arbitration method).5.5.2.1 Method summary
In acidic solution, use potassium iodide and stannous chloride to reduce As(V) to As (I), add zinc particles and react with acid to generate new ecological hydrogen, which further reduces As (I) to arsine, and the arsine gas is absorbed by the silver diethyldithiocarbamate-triethylamine chloroform solution , generate a purple-red product, which is measured with a spectrophotometer. 5.5.2.2 Reagents and materials
5.5.2.2.1 Arsenic-free zinc (GB2304);
5.5.2.2.2 Potassium iodide (GB1272);
5.5.2.2.3 Sulfuric acid ( GB625) solution: 1+1 solution; 5.5.2.2.4 Stannous chloride (GB638) hydrochloric acid solution: 400g/L, GB4482-93
5.5.2.2.5 Arsenic standard solution: 1mL solution contains 0.0100mgAs , prepare before use. Use a pipette to transfer 10 mL of arsenic standard solution prepared according to GB602, place it in a 100 mL volumetric flask, add water to the mark, and shake well. 5.5.2.2.6 Silver diethyldithiocarbamate-triethylamine chloroform (GB682) solution (hereinafter referred to as the absorption liquid); 5.5.2.2.7 Lead acetate (HG3--974) cotton. 5.5.2.3 Instruments and equipment
General laboratory instruments and
5.5.2.3.1 Arsenic determiner: see the provisions of GB610.2 Article 5.3; 5.5.2.3.2 Spectrophotometer: with 1cm absorption pool. 5.5.2.4 Analysis steps
5.5.2.4.1 Drawing of working curve
Use a pipette to pipette 0, 0.5, 1.0, 1.5, 2.0, 2 respectively.5mL of arsenic standard solution was placed in six arsenic determination bottles. Add water to each solution to approximately 50 mL, add 4 mL of sulfuric acid solution, 1 g of potassium iodide, and 2 mL of stannous chloride solution, shake well, and leave for 15 min. Use a pipette to transfer 5 mL of absorption solution into the absorption tube. Quickly add 3g of arsenic-free zinc to the arsenic determination bottle. Immediately connect all parts of the arsenic determination device to avoid air leakage. Use 25 ml at room temperature (room temperature is lower than 15°C). ~30℃ water bath) for 45 min. Remove the absorption tube and replenish the volume of the absorption solution to 5 mL with chloroform.
At a wavelength of 510nm, use a 1cm absorption cell, use chloroform as a control, adjust the absorbance of the spectrophotometer to zero, and measure the absorbance of each solution.
Subtract the absorbance of the reagent blank solution from the absorbance of each standard solution, take the arsenic content as the abscissa and the corresponding absorbance as the ordinate, and draw a working curve.
5.5.2.4.2 Determination
Weigh about 1g sample in a dry and clean weighing bottle, accurate to 0.01g, place it in an arsenic determination bottle, add water to about 50mL to dissolve the sample . The following operations are as described in 5.5.2.4.1, add 4mL of sulfuric acid solution from \. "Start to \Measure the absorbance of each solution". At the same time, do a reagent blank test.
5.5.2.5 Expression of analysis results
The stele content (X,) expressed as mass percentage is calculated according to formula (5): × 100 = 0. 1 (m - mo)||tt| |mmo
X, =
m×1000
m
where: mi
mo-
m-||tt ||According to the measured absorbance of the test solution, the mass of arsenic detected from the working curve, mg; According to the measured absorbance of the reagent blank solution, the mass of arsenic detected from the working curve, mg; The mass of the sample, g.
5.5.2.6 Allowable difference
Take the arithmetic mean of the parallel measurement results as the measurement result; the absolute difference of the parallel measurement results shall not be greater than 0.0002%. 5.6 Determination of lead content
5.6..1 Method 1 disulfide visual colorimetry
5.6.1.1 Method summary
·(5)
Dissolve in water From the sample, extract the ferric iron with ether, adjust the pH value of the aqueous phase to 8-10, add a masking agent, and extract the lead with a disulfide-carbon tetrachloride solution to generate a brick-red disulfide salt, which is the same as the standard colorimetric solution. View comparison. 5.6.1.2. Reagents and materials
5.6.1.2.1 Diethyl ether (HG3-1002)
5.6.1.2.2 Triammonium citrate solution: 100g/L; 5.6.1.2.3 Hydroxylamine hydrochloride (GB6685) solution: 100g/L; 5.6.1.2.4 Potassium cyanide solution: 200g/L; GB4482-93
5.6.1.2.5 Hydrochloric acid (GB622) solution: 1+1 solution; 5.6.1.2 .6 Nitrogen water (GB631) solution: 1+1 solution; 5.6.1.2.7 Diphenylthiobacteria (disulfonate)-chloroform solution: 0.02g/L chloroform solution, prepared before use. Pipette 5 mL of the disulfide-trifluoromethane solution prepared according to Appendix B, place it in a 100 mL volumetric flask, add chloroform to the mark, and shake well.
5.6.1.2.8 Lead standard solution: 1mL solution contains 0.0010mgPb, prepared before use. Use a pipette to transfer 5 mL of the lead standard solution prepared according to GB602, place it in a 500 mL volumetric flask, add (1 + 199) nitric acid solution to the mark, and shake well.
5.6.1.3 Instruments and equipment
General laboratory instruments and
5.6.1.3.1 Colorimetric tube: the volume is 50mL; 5.6.1.3.2 Separating funnel: the volume is 100mL5.6.1.4 Analysis steps
Weigh 0.20g sample in a dry and clean weighing bottle, accurate to 0.01g, wash it into a separatory funnel with 20mL hydrochloric acid solution, add 20mL ether for extraction, and discard Organic phase, and then repeatedly extract the aqueous phase with 20 mL of diethyl ether until colorless. Move the water phase into a beaker, heat and evaporate on an electric stove until it is nearly dry, add 5 mL of water, 5 mL of triammonium citrate solution, 2 mL of hydroxylamine hydrochloride solution and 2 mL of ammonia water, and transfer to a 50 mL colorimetric tube. Add 2 mL potassium cyanide solution, 5 mL disulfide gland-chloroform solution, add water to the mark, shake well, and leave for 10 minutes. The brick red color of the organic layer should not be darker than the standard colorimetric solution. Preparation of standard colorimetric solution: Use a pipette to transfer 8 mL of lead standard solution, place it in a colorimetric tube, add 5. mL of triammonium citrate solution, 2 mL of hydroxylamine hydrochloride solution, and 2 mL of ammonia water, and shake well. Then add 2 mL of potassium cyanide solution, 5 mL of disulfide trichloromethane solution, add water to the mark, shake well, and leave for 10 minutes.
The measurement of the sample should be carried out at the same time as the preparation of the standard colorimetric solution. The waste liquid after measurement should be disposed of in accordance with the provisions of Appendix C. 5.6.2 Method 2 Atomic Absorption Spectrometry (Arbitration Method) 5.6.2.1. Method Summary
Add nitric acid and hydrogen peroxide to the sample to dissociate the lead in various lead compounds into lead ions, using atoms Determination of lead content by absorption spectrometry.
5.6.2.2 Reagents and materials
5.6.2.2.1 Nitric acid (GB626) solution: superior grade pure, 1+1 solution; 5.6.2.2.2 Nitric acid (GB626) solution: superior grade pure , 1+199 solution; 5.6.2.2.3 Hydrogen peroxide (GB684): superior grade pure; 5.6.2.2.4 Lead standard solution: 1mL solution contains 0.0010mg/Pb, prepare before use, pipette with pipette Place 5 mL of lead standard solution prepared according to GB602 in a 500 mL volumetric flask, add nitric acid solution (5.6.2.2.2) to the mark, and shake well.
5.6.2.3. Instruments and equipment
All glass instruments must be cleaned with nitric acid (1+1) and then washed with water. General laboratory instruments, equipment and
5.6.2.3.1 Argon gas cylinders and argon gas;
5.6.2.3.2 Atomic absorption spectrometer: with graphite furnace control device, lead hollow cathode lamp , Er lamp or Zeeman background subtraction device; 5.6.2.3.3 Micro quantitative sampler: 20 μL. 5.6.2.4 Analysis steps
5.6.2.4.1 Drawing of working curve
GB4482-93
Use a pipette to pipette 0, 1, 3, 5, 7, 9mL respectively Lead standard solution is placed in six 100mL volumetric flasks, add nitric acid (5.6.2.2.2) solution to the mark, and shake well.
According to the instrument manual, adjust the atomic absorption spectrometer to the best condition. After zeroing the instrument, measure the absorbance of each standard solution. The graphite furnace atomization parameters can be referenced in Table 2: Table 2
dry
temperature, ℃
ramp temperature, s
hold, s
argon Air flow, mL/min
200
20
10
300
ashing
600
10| |tt||20
.300
atomization
2 300.
1
5
50
clear
2500
1
3
300
Subtract the absorbance of the reagent blank solution from the absorbance of each standard solution to give the lead content The abscissa is the corresponding absorbance and the ordinate is the corresponding absorbance, and the working curve is drawn.
5.6.2.4.2 Measurement
Weigh about 3g of the sample in a dry and clean weighing bottle, accurate to 0.01g, transfer it to a 1000mL volumetric flask, add water to the mark; shake well.
Use a pipette to transfer 50mL of test solution, place it in a 250mL beaker, add water to about 100mL, carefully add 2mL hydrogen peroxide and 2mL nitric acid (5.6.2.2.1), heat and evaporate until the solution is about 40mL. Cool to room temperature, transfer completely to a 100mL volumetric flask, add water to the mark, and shake well. Measure the absorbance using an atomic absorption spectrometer under the same conditions as the absorbance of the standard solution. At the same time, do a reagent blank test.
5.6.2.5 Expression of analysis results
The lead content (X.) expressed as mass percentage is calculated according to formula (6): X.
Where: m
mi-mo
2(m -mo)
×100=
50
m×10 %×1 000
m
According to the measured absorbance of the test solution, the mass of lead found from the working curve, mg; m. - According to the measured absorbance of the reagent blank solution, the mass of lead found from the working curve, mg; m-
- the mass of the sample, g.
5.6.2.6 Allowable difference
Take the arithmetic mean of the parallel measurement results as the measurement result, and the absolute difference of the parallel measurement results shall not be greater than 0.0003%. 6 Inspection Rules
(6)
6.1 Water purification agent iron nitride should be inspected by the quality supervision and inspection department of the manufacturer in accordance with the provisions of this standard. The manufacturer should ensure that all products shipped out of the factory comply with requirements of this standard.
Each batch of products leaving the factory should be accompanied by a quality certificate, which includes: manufacturer name, product name, model, grade, net weight, batch number or production date, proof that the product quality complies with this standard and this standard serial number. 6.2 The user has the right to inspect and accept the water purification agent ferric fluoride received in accordance with the provisions of this standard. 6.3 Each batch of water purifying agent ferric chloride shall not exceed: 20t for type I and 60t for type 1. 6.4 The number of sampling units for sampling of anhydrous ferric fluoride shall be determined in accordance with Article 6.6 of GB6678. When sampling, peel off the sample about 5cm thick on the surface, and insert the sampler vertically from the center of the packaging unit to 3/4 of the depth of the material layer to sample. After mixing the sampled products in a closed container, the average sample taken out shall not be less than 500g.
GB4482-93
The sampling of ferric chloride solution shall be carried out according to the packaging, storage and transportation tools, and in accordance with the provisions of Article 2 of GB6680. After mixing the sampled products, the average sample taken should not be less than 500mL.
Divide the collected samples into two clean, dry reagent bottles with ground stoppers and seal them. A label should be attached to the reagent bottle, indicating the name of the manufacturer, product name, model, grade, batch number, sampling date and name of the sampler. One bottle is for inspection and the other bottle is for future reference. The shelf life is 3 months.
6.5 If one of the inspection results does not meet the requirements of this standard, samples from twice the amount of packaging units should be re-sampled for verification. Even if one of the inspection results does not meet the requirements of this standard, the entire batch of products Cannot be accepted. 6.6 When the supply and demand parties have objections to product quality, they shall be handled in accordance with the provisions of the "National Product Quality Arbitration and Inspection Interim Supervision Measures". 6.7 Use the rounded value comparison method specified in GB1250 to determine whether the inspection results meet the standards. , 7 signs, packaging, transportation, storage
7.1 The water purifier ferric chloride packaging container should have a firm and clear mark, including: manufacturer name, product name, trademark, model, grade, net weight, batch number Or production date and this standard number. 7.2 There are three packaging methods for anhydrous ferric fluoride (see 7.2.1, 7.2.2 and 7.2.3) and two packaging methods for ferric fluoride solution (see 7.2.4 and 7.2.5).
7.2.1 Hard fiber board drum packaging: The inner packaging bag is made of food-grade vinyl plastic film bag, the size is 600mm×400mm, the thickness is 0.1mm, the outer packaging is made of hard fiber board drum, the size is $400 mm×500mm, thickness is 4mm, its performance and inspection methods should comply with relevant regulations. The net weight of each barrel of water purifying agent ferric chloride is 50kg. 7.2.2 Polyethylene plastic barrel packaging: The inner packaging bag is made of food-grade polyethylene plastic film bags with dimensions of 600mm×400mm and thickness of 0.1mm; the outer packaging is made of polyethylene plastic barrels with dimensions of 360mm×500mm. Its performance and inspection methods should comply with relevant regulations. The net weight of each barrel of water purifying agent anhydrous ferric fluoride is 50kg. 7.2.3 Iron drum packaging: The specifications and dimensions of the iron drum are 350mm×485mm and the thickness is 0.5mm. Its performance and inspection methods should comply with relevant regulations. The net weight of each barrel of water purifying agent anhydrous ferric chloride is 50kg. 7.2.4 Special tank truck packaging: The ferric chloride solution is packed in a tank truck made of fiberglass, and its specifications and dimensions should comply with the loading dimensions of the transportation vehicle.
7.2.5 Polyethylene plastic drum packaging: The specifications and dimensions of the plastic drum are $360mm×500mm, and its performance and inspection methods should comply with relevant regulations. The net weight of each barrel of ferric fluoride solution is 50kg. 7.3 The water purifying agent anhydrous ferric chloride is packaged using 3 sealing methods (see 7.3.1, 7.3.2 and 7.3.3). The water purifying agent ferric chloride solution is packaged using 2 sealing methods (see 7.3.4 and 7.3. 5) 7.3.1 When packed in hard fiberboard drums, the inner bag should be manually tied with Vinyl rope or other ropes of equivalent quality, or other equivalent methods should be used to seal the fiberboard drums with a lid nailed with a cross-shaped supporting wooden block. OK, use iron reinforcing ribs to nail the lid and barrel body tightly. 7.3.2 When packaging in vinyl plastic barrels, the inner bag should be manually tied with Vinyl rope or other ropes of equivalent quality, or sealed in other equivalent ways. The plastic barrel should be padded with a rubber gasket between the lid and the mouth of the barrel. seal. 7.3.3. When packaging in iron drums, the middle-opening drums should be sealed with a gland. For full-opening drums, a semicircular rubber gasket should be placed between the lid and the mouth of the drum to seal, and a seal with a keyhole should be used. The arc-shaped snap ring is clamped tightly and sealed with lead. 7.3.4 When packaging in a special tank car, the opening of the tank car should be tightly covered with an iron cover and stuck firmly. 7.3.5 When packaging ferric chloride solution in vinyl plastic barrels, seal the plastic barrel with an inner cover and a rubber gasket inside the outer cover to tighten it. 7.4 The water purifier ferric chloride should be covered during transportation to prevent rain, impact and contamination by toxic substances. 7.5 Anhydrous ferric fluoride should be stored in a dry and ventilated warehouse and should not be stacked in the open. Ferric fluoride solution should be stored in special steel storage tanks and tankers.2 Polyethylene plastic barrel packaging: The inner packaging bag is made of food-grade polyethylene plastic film bags with dimensions of 600mm×400mm and thickness of 0.1mm; the outer packaging is made of polyethylene plastic barrels with dimensions of 360mm×500mm. Its performance and inspection The method should comply with relevant regulations. The net weight of each barrel of water purifying agent anhydrous ferric fluoride is 50kg. 7.2.3 Iron drum packaging: The specifications and dimensions of the iron drum are 350mm×485mm and the thickness is 0.5mm. Its performance and inspection methods should comply with relevant regulations. The net weight of each barrel of water purifying agent anhydrous ferric chloride is 50kg. 7.2.4 Special tank truck packaging: The ferric chloride solution is packed in a tank truck made of fiberglass, and its specifications and dimensions should comply with the loading dimensions of the transportation vehicle.
7.2.5 Polyethylene plastic drum packaging: The specifications and dimensions of the plastic drum are $360mm×500mm, and its performance and inspection methods should comply with relevant regulations. The net weight of each barrel of ferric fluoride solution is 50kg. 7.3 The water purifying agent anhydrous ferric chloride is packaged using 3 sealing methods (see 7.3.1, 7.3.2 and 7.3.3). The water purifying agent ferric chloride solution is packaged using 2 sealing methods (see 7.3.4 and 7.3. 5) 7.3.1 When packed in hard fiberboard drums, the inner bag should be manually tied with Vinyl rope or other ropes of equivalent quality, or other equivalent methods should be used to seal the fiberboard drums with a lid nailed with a cross-shaped supporting wooden block. OK, use iron reinforcing ribs to nail the lid and barrel body tightly. 7.3.2 When packaging in vinyl plastic barrels, the inner bag should be manually tied with Vinyl rope or other ropes of equivalent quality, or sealed in other equivalent ways. The plastic barrel should be padded with a rubber gasket between the lid and the mouth of the barrel. seal. 7.3.3. When packaging in iron drums, the middle-opening drums should be sealed with a gland. For full-opening drums, a semicircular rubber gasket should be placed between the lid and the mouth of the drum to seal, and a seal with a keyhole should be used. The arc-shaped snap ring is clamped tightly and sealed with lead. 7.3.4 When packaging in a special tank car, the opening of the tank car should be tightly covered with an iron cover and stuck firmly. 7.3.5 When packaging ferric chloride solution in vinyl plastic barrels, seal the plastic barrel with an inner cover and a rubber gasket inside the outer cover to tighten it. 7.4 The water purifier ferric chloride should be covered during transportation to prevent rain, impact and contamination by toxic substances. 7.5 Anhydrous ferric fluoride should be stored in a dry and ventilated warehouse and should not be stacked in the open. Ferric fluoride solution should be stored in special steel storage tanks and tankers.2 Polyethylene plastic barrel packaging: The inner packaging bag is made of food-grade polyethylene plastic film bags with dimensions of 600mm×400mm and thickness of 0.1mm; the outer packaging is made of polyethylene plastic barrels with dimensions of 360mm×500mm. Its performance and inspection The method should comply with relevant regulations. The net weight of each barrel of water purifying agent anhydrous ferric fluoride is 50kg. 7.2.3 Iron drum packaging: The specifications and dimensions of the iron drum are 350mm×485mm and the thickness is 0.5mm. Its performance and inspection methods should comply with relevant regulations. The net weight of each barrel of water purifying agent anhydrous ferric chloride is 50kg. 7.2.4 Special tank truck packaging: The ferric chloride solution is packed in a tank truck made of fiberglass, and its specifications and dimensions should comply with the loading dimensions of the transportation vehicle.
7.2.5 Polyethylene plastic drum packaging: The specifications and dimensions of the plastic drum are $360mm×500mm, and its performance and inspection methods should comply with relevant regulations. The net weight of each barrel of ferric fluoride solution is 50kg. 7.3 The water purifying agent anhydrous ferric chloride is packaged using 3 sealing methods (see 7.3.1, 7.3.2 and 7.3.3). The water purifying agent ferric chloride solution is packaged using 2 sealing methods (see 7.3.4 and 7.3. 5) 7.3.1 When packed in hard fiberboard drums, the inner bag should be manually tied with Vinyl rope or other ropes of equivalent quality, or other equivalent methods should be used to seal the fiberboard drums with a lid nailed with a cross-shaped supporting wooden block. OK, use iron reinforcing ribs to nail the lid and barrel body tightly. 7.3.2 When packaging in vinyl plastic barrels, the inner bag should be manually tied with Vinyl rope or other ropes of equivalent quality, or sealed in other equivalent ways. The plastic barrel should be padded with a rubber gasket between the lid and the mouth of the barrel. seal. 7.3.3. When packaging in iron drums, the middle-opening drums should be sealed with a gland. For full-opening drums, a semicircular rubber gasket should be placed between the lid and the mouth of the drum to seal, and a seal with a keyhole should be used. The arc-shaped snap ring is clamped tightly and sealed with lead. 7.3.4 When packaging in a special tanker, the tanker mouth should be tightly covered with an iron cover and stuck firmly. 7.3.5 When packaging ferric chloride solution in vinyl plastic barrels, seal the plastic barrel with an inner cover and a rubber gasket inside the outer cover to tighten it. 7.4 The water purifier ferric chloride should be covered during transportation to prevent rain, impact and contamination by toxic substances. 7.5 Anhydrous ferric fluoride should be stored in a dry and ventilated warehouse and should not be stacked in the open. Ferric fluoride solution should be stored in special steel storage tanks and tankers.
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