HG/T 3484-1999Chemical reagent Standard of clear liquor, made from glass dust, and standard of transparence (English PDF)

Foreword

This standard is revised on the basis of the chemical industry standard HG/T

3484-1978 "Preparation and determination method of transparence standard

(glass emulsion method)".

The main differences between this standard and HG/T 3484-1978 are as

follows.

CHANGE the standard name from "Preparation and determination method of

transparence standard (glass emulsion method)" to "Chemical reagent -

Standard of clear liquor, made from glass dust, and standard of transparence";

CHANGE the name of non-volatile matter to solid content; MODIFY the amount

of standard glass emulsion which is used in the preparation of transparence

standard to 1.3 times that of the original standard.

The preparation of standard glass emulsions and the requirements for particle

size are given in Appendix A (Normative).

This standard replaces HG/T 3484-1978 from the date of implementation.

This standard was proposed by the Technical Supervision Department of the

former Ministry of Chemical Industry of the People's Republic of China.

This standard shall be under the jurisdiction of the Chemical Reagents Branch

of the National Chemical Standardization Technical Committee.

Drafting organization of this standard. Beijing Beihua Fine Chemicals Co., Ltd.

The main drafter of this standard. Guan Ruibao.

This standard was first published in 1978.

Chemical reagent - Standard of clear liquor, made

from glass dust, and standard of transparence

1 Scope

This standard specifies the requirements, test methods, testing rules,

packaging and marking of chemical reagent - standard of clear liquor, made

from glass dust.

This standard specifies the method of preparation of the standard of

transparence.

2 Normative references

The provisions contained in the following standards constitute provisions of this

standard by reference in this standard. At the time of publication, the editions

indicated were valid. All standards will be revised and parties using this

standard shall explore the possibility of using the latest version of the following

standards.

GB/T 619-88 Chemical reagent - Sampling and acceptance rules

GB/T 9721-88 Chemical reagent - General rules for molecular absorption

spectrophotometry (UV and visible light)

GB/T 6682-92 Water for analytical laboratory use - Specification and test

methods (neq ISO 3696.1987)

GB 15346-94 Chemical reagent - Packaging and marking

3 Standard glass emulsion