This standard specifies the test methods for the color, appearance, softening point, acid value, unsaponifiable matter, ethanol insoluble matter and ash of rosin. This standard is applicable to the test of rosin. GB/T 8146-2003 Rosin test method GB/T8146-2003 standard download decompression password: www.bzxz.net

ICSE5.353
National Standard of the People's Republic of China
CH/T8146-2003
Replaces GB/T 8116---987
Test methods for rosin
Testitiethodsforrosin
2003-06-17 Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China on December 1, 2003, and implemented by this standard/standard rosin test method 11 and [changes such as: GB/T9146-20G3. For the chromaticity index of the standard chromaticity device of rosin, the International Committee of Illumination (C[E) 931 standard chromaticity system is adopted, and the production site and light source are selected, the color grading standard of rosin sampling and grading is specified in the national standard ASTM115-1, so as to ensure the supply of rosin! The determination system of appearance is increased (see 3.3), and a comparative qualitative test method for transparency is now established: the relevant principles are added (1.1, 7., 8.1! 5.1, 6.2) and the conditions of the mixer are increased (4.8)
The softening point determination coupon 1 must be carried out under the following conditions: see Figure 2), so that it is consistent with the numerical values ​​of the international standard test methods for softening point determination (sphere and ball method) (H1:07-1599) 3 and 4 TME station-1599 non-sphere method for determining the softening point of the test fragrance and fat;
--Standard section The unit of the latter is gram per unit (mg/yuan,, 1); Appendix A
Requirements of this standard:
Standard Source: State Forestry Bureau of the People's Republic of China, Institute of Forestry Chemistry, China Forestry Science Research Institute, Institute of Forest Products Chemistry, Chinese Academy of Forestry, Main responsible persons for this standard: Chu Zhennai, Liu Guangzhang, Xue Min, Li Dong, This standard replaces the new standard, the second time of issuance: GHs146--037
1 Specification
Rosin test method
CB/T 8145—2003
This note specifies the color, appearance, softening point, acid value, unsaponifiable matter, acetyl esters and toothpaste of rosin. This note applies to the test method of rosin age.
2 Normative references
The following documents quote the efficacy of many approved drugs in their own standards. All references in the social period shall be followed by the whole collection (excluding local errors) or the whole adjustment of the minimum value for the wood standard. The efficacy of the whole shall be based on the agreement reached between the parties. The new version of this document shall be applicable to this standard: GB/T1 Chemical Test by Titration (Analysis by Volume) Preparation of Jiangyu Liquid 3 Determination of Color Reappearance
3.1 Color Grading
The color grading card of the test incense adopts the color standard of the whole world: the color standard of the whole world preserved by the Institute of Chemical Industry of the University of Science and Technology of China, which is formulated as the color standard of the test incense. The color of each level is the International Color Standard (CE3) of the International Color Standard System. See Table 1. Table 1 Color standard of the test incense is not the International Color Standard (CI1931 Standard Color Standard) (S20 Standard Blocks of Each Level)
Temperature and Color Standard
Temperature and Color Standard
R., 427 7
.1sf s
r, 482 5
, 49: 7
. :-5?
Text with 2 visual penetration, C light source.
3.2 Color group inspection
3.2.1 Sample accuracy
G, 482 4
T:, 46: 1
f, 454
Enough and)
Speed ​​through Y)
Main stream length
Push the sample to be measured according to the electric dot fast connection, the intermittent pool sense station length is slightly larger than 2%m grams of the text, and the production of each operation with soft paper or grid flowers is naturally clean. Finally, the analog color is used for the surface of the analog color. The surface should be parallel to the inner plane. The thickness of the head is 2 mr:te
3.2.2 Grading
The rosin color is compared with the rosin color standard by direct comparison: Use the natural scattered light from the north-facing window in the room or other stable white light sources. When the item has the following conditions, it is changed to a darker color than the standard:
The color is too dark;
The color is too dark;
The color is too dark;
The color is too dark;
The color is too dark;
GB/T 8146—2903
The color grade of the slightly fragrant sample after colorimetry should be determined by the colorimetric standard: Example: The color grade of the slightly fragrant sample after colorimetry should be determined by the small depth of the dried sample: Example: The color grade of the slightly fragrant sample should be determined by the colorimetric standard: Example: The color grade of the slightly fragrant sample should be determined by the colorimetric standard: Example: The color grade of the slightly fragrant sample should be determined by the colorimetric standard: Example: The color grade of the slightly fragrant sample should be determined by the colorimetric standard: Example: The color grade of the slightly fragrant sample should be determined by the colorimetric standard: Example: The color grade of the slightly fragrant sample should be determined by the colorimetric standard: Example: The color grade of the slightly fragrant sample should be determined by the colorimetric standard: Example: The color grade of the slightly fragrant sample should be determined by the colorimetric standard: Example: The color grade of the slightly fragrant sample should be determined by the colorimetric standard: Example: The color grade of the slightly fragrant sample should be determined by the colorimetric standard: Example: The color grade of the slightly fragrant sample should be determined by the colorimetric standard: Example: The color grade of the slightly fragrant sample should be determined by the colorimetric standard: Example: The color grade of the slightly fragrant sample should be determined by the colorimetric standard: Example: 4 Determination of softening point by ring and ball method
4.1 Summary
Pine resin has no fixed melting point and changes when heated. After being completely filled with rosin, two light balls of different mass and diameter are made, which are of different shapes and sizes. After being pulled up at a certain speed in a supernatant medium, the temperature at which the rosin balls fall from a fixed point is taken as the softening point of the rosin. 4.2 Instruments 4.2.1 Softening point setting instrument, the device is shown in Figure 1. The necessary elements are as follows: Frequency setting instrument: Frequency setting instrument: Ring plate: Dimensions in the figure are in millimeters, 1. Softening point setting instrument OT'0FF 2.15.5±0.9 Note: The dimensions in the figure are for all specifications (m:ne7gal..a.10).
Figure 2 Main parts of the chemical point measuring plate
1. The main parts are the ring, the period positioner, and the ring frame plate should be made of yellow steel 4.2.3 steel ball, white diameter 9.5mm upper 0.1mm layer = 3.45g~3.56, the surface should be smooth and rust-free CE/Y8146-2CC3
4.2.4 The distance between the frame and the plate is 25.4m. The distance between the half plate and the bottom of the plate is 13m. The distance between the frame plate and the plate is y5-ma.
4. 2. 5 The roughness of the ring frame plate and the flat plate should be greater than, not less than c. 1 mm/Loc mm.4.2. No. 3000 meter, internal standard type, height m, length 100m, range 33-10, layer size 0, water ball diameter 5.0mm:5.5mm, mercury ball length 8mm:2mm, full range 380m10omm.4.2.7 cup, capacity about 100ml. diameter J0mm. height not less than 11.0rr.4.2.3 stirrer, a three-stage stirrer is used, and a mechanical or electric stirrer can also be used. The user should be uniform, six should be considered according to the flow, should not produce original movement, should not produce a small amount of gas pool, 4.3 heating medium
4.3.1 new hot water
Put the hot water into the beaker and heat it to the softening point below 3 degrees, and then cool it down to the loose set sample.
4.3.2 propylene glycol (glycerol)
5, analysis: the general product of the product with a large melting point should be tested according to CB/T8146-2303Www.bzxZ.net
4.4 operation method
4.4.1 drop the sample once and test it under the same conditions. 4..2 take the powder to the diameter of the medicine: mm, slowly heat it at the temperature as possible, and avoid the generation of gas. The melted product should be placed flat on the preheated round ring on the front plate immediately, and then lightly clean it. The ring should be full of looseness, and there should be no bulges on the surface. If the loose product is outside or there is gas, it should be made in a new way.
4.4.3 put the unprepared test ring on the ring stand, install the steel positioner on the ring, and then put the steel into the steel center.From the top of the outer rack, draw the mercury ball so that the bottom is level with the blood and then return the entire rack to the inside. After the light is on, pour the newly distilled water into the beaker until the water is only 5mm above the rack. 11.11. Heat the water with an adjustable temperature control furnace and heat it for 5 minutes (5 minutes). Keep the light on and keep the temperature constant until the temperature is 2 liters.
4.4.4 If the sample temperature is too high, the heat transfer medium in the device should be changed to two enzymes. 4.5 Results and Reports
4. 5. 1 Determination of the melting point of rosin The melting point of rosin is expressed in terms of the temperature of the single ball and the unit of measurement (4.5.2 Reporting the values ​​of the two determinations at the beginning and the end of the test, the arithmetic mean is calculated and the value after the minimum recording point is expressed as 5 digits. 5.1 Principle The main components of rosin are aldehydes and acid. The initial reaction can be carried out; The acid content of rosin is 1.1777 g/cm2 and the acid content is 0.1777 g/cm2. Therefore, it can be determined by the chemical method. The acid content of rosin is shown in the table below. 5.2 Reagents 5.2.1 Neutral acetic acid is mixed with ethanol (67%) and separated into pure potassium hydroxide emulsion with indicator solution until the chain is separated. 5.2.2.1. Prepare indicator solution (1 or 1). 5.2.3 C.5uHL/L potassium hydroxide standard titration solution (comply with 3.5 μL/L analytical pure potassium hydroxide, add water to dilute to 100%, and then add 1% standard reagent (comply with 1257) to dissolve the base material in the solution. Follow the standard method of 1/T501!3.mol/1.0.0 oxidation solution. 001m/. 5.3 Operation method
5.3.1 Make two samples
5.2 Remove the upper surface part and crush it immediately. Weigh 2 (accurate to 0.0) 1) 25) mL of the sample and add 53% neutral ethanol to the sample (heat it in a water bath if necessary. Let the sample cool down) and add 50% indicator to the sample. Titrate with gold complex potassium standard solution until the reddish valence is not considered as a mountain. 5.4 Calculation and report of results
5. 4.1 Calculation of the acid value The acid value is given by the mass of hydrogenated isocyanate (RI), expressed in grams (mR) using the formula (1): The standard titration solution of hydrogenated isocyanate (5.2.3) is titrated in grams [\:.); The standard rapid oxidation solution is 5 grams per liter (m/.) The total value is accurate and the test volume is in grams (g): The mass of potassium hydroxide is expressed in grams per liter (m/.).
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