HG/T 3484-1999 Chemical reagent standard Glass emulsion and clarity standard HG/T3484-1999 Standard download decompression password: www.bzxz.net

Record number: 3870-1999
HG/T 3484-1999
This standard is revised on the basis of the chemical industry standard HG/T3484-1978 "Preparation and determination method of clarity standard (glass emulsion method)".
The main differences between this standard and HG/T3484-1978 are: the name of the standard is changed from "Preparation and determination method of clarity standard (glass emulsion method)" to "Standard glass emulsion and clarity standard"; the name of non-volatile matter is changed to solid content; the amount of standard glass emulsion used in the preparation of clarity standard is 1.3 times that of the original standard. The preparation of standard glass emulsion and the requirements for particle size are shown in Appendix A (Appendix to the standard). This standard will replace HG/T3484-1978 from the date of implementation. This standard is proposed by the Technical Supervision Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of the Chemical Reagent Branch of the National Technical Committee for Chemical Standardization. The drafting unit of this standard is Beijing Beihua Fine Chemicals Co., Ltd. The main drafter of this standard is Guan Ruibao.
This standard was first issued in 1978.
1 Scope
Chemical Industry Standard of the People's Republic of China
Chemical Reagent
Standard of Clear Liquor and Standard of Clarity
Chemical Reagent
Standard of Clear Liquor,made from Glass Dust,and Standard of TransparenceHG/T3484—1999
Replaces HG/T 3484--1978
This standard specifies the requirements, test methods, detection rules, packaging and marking of standard glass emulsion for chemical reagents. This standard specifies the preparation method of clarity standard. 2
Cited Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard was published, the versions shown were all valid. All standards will be revised. All parties using this standard should explore the possibility of using the latest version of the following standards. GB/T619-1988 Sampling and acceptance rules for chemical reagents GB/T9721--1988
Chemical reagent molecular absorption spectrophotometry (ultraviolet and visible light parts) GB/T6682-1992 Specifications and test methods for water for analytical laboratories (neqISO3696:1987) GB15346--1994 Chemical reagent packaging and marking 3 Standard glass emulsion
3.1 Properties
Standard glass emulsion is a suspension containing fine glass powder, which can settle after standing and remains suspended after shaking. 3.2 Indicators
The indicators of standard glass emulsion are shown in Table 1.
Table 1 Indicators of standard glass emulsion
Percent transmittance, %
Solid content, mg/L
3.3 Test
The experimental water used in this test shall meet the specifications of grade 3 water in GB/T6682. 3.3.1 Percent transmittance
It shall be determined in accordance with the provisions of GB/T 9721, where: 3.3.1.1 Determination conditions
Thickness of absorption cell: 1cm;
Reference solution: water;
Approved by the State Administration of Petroleum and Chemical Industry on June 16, 1999, 284
87.5~88.5
Implemented on June 1, 2000
Wavelength: 360nm.
3.3.1.2 Determination method
HG/T 3484—1999
After fully shaking the standard glass emulsion [the preparation of the standard glass emulsion is shown in Appendix A (Standard Appendix)], open the ampoule, draw the standard glass emulsion and place it in the absorption cell to determine the percent transmittance. Determine 8 times and take the average value. 3.3.2 Solid content
Measure 100mL of the standard glass emulsion, place it in an evaporating liquid that has been kept constant at (105±2)℃, evaporate it to dryness on a water bath, and dry it in an electric oven at (105±2)℃ until the mass is constant. The solid content is calculated according to formula (1):
Where: X—solid content, mg/L,
residue and empty liquid mass, mg,
empty dish mass, mg.
3.4 ​​Inspection rules
Sampling and acceptance shall be carried out in accordance with the provisions of GB/T619. 3.5 Packaging and marking
× 1 000
·(1)
Packaging, storage and transportation shall be carried out in accordance with the provisions of GB15346, and marking shall be given, including: standard glass emulsion packaged in ampoules, with a shelf life of three months.
Packing unit: Class 6 and 7,
Inner packaging form: NB-39;
Medium packaging form: ZB-8
Outer packaging form: WB-2, WB-3.
4 Preparation of purity standards
4.1 Preparation of double distilled water
Add a small amount of potassium permanganate to distilled water (third-grade water) and perform double distillation, and collect for later use. 4.2 Preparation of Clarity Standard
After fully shaking the standard glass emulsion, open the ampoule and, according to the provisions of Table 2, pipette the specified volume of standard glass emulsion and the corresponding volume of newly prepared double distilled water and spread evenly. Measure the volume accurately to 0.1 mL. After preparation, place it in a bottle with a ground stopper. Table 2 Preparation of Clarity Standard
Clarity Standard
4.3 Use of Clarity StandardbzxZ.net
The prepared clarity standard is valid for two weeks. Standard glass emulsion, mL
Water, mL
HG/T 3484—1999
Appendix A
(Standard Appendix)
Preparation of standard glass emulsion
Place B40 glass (length 2~3cm, width 1~~1.5cm, diameter 0.3~~0.4cm) in a grinding bottle made of B40 glass, add appropriate amount of newly prepared double distilled water (4.1), grind on an oscillator at a speed of (275±5) times/min until the glass piece has a smooth and sharp surface, discard the water layer, and repeat the operation twice.
Take 150g of the treated glass piece and place it in a grinding bottle, add 250mL of newly prepared double distilled water, oscillate intermittently for about 40h, and let it stand for 4h. Carefully draw the solution from 1/3 of the liquid surface, and measure the particle size under a microscope using a 10×100 or 15×100 magnifying glass. The particles of 1 to 2 μm should be about 80%. Draw another 25 mL from 1/3 of the liquid surface, and dilute with freshly prepared double distilled water until the percent transmittance is within the range of 87.5% to 88.5%. Immediately seal with an ampere.
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