GB/T 9853-2008 in English

《GB/T 9853-2008化学试剂 无水硫酸钠》由TC63（全国化学标准化技术委员会）归口，TC63SC3（全国化学标准化技术委员会化学试剂分会）执行，主管部门为中国石油和化学工业联合会。

1 Scope
This standard specifies the characteristics, specifications, tests, inspection rules, packaging and marking of sodium sulfate anhydrous reagent.
This standard is applicable to the inspection of sodium sulfate anhydrous reagent.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated reference, subsequent amendments (excluding correction of error) to, or revisions of, any of these publications do not apply. However, parties to agreements based on this national standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the document referred to applies.
GB/T 601 Chemical reagent—Preparations of reference titration solutions
GB/T 602 Chemical reagent—Preparations of standard solutions for impurity (GB/T 602-2002, ISO 6353-1: 1982, NEQ)
GB/T 603 Chemical reagent—Preparations of reagent solutions for use in test methods (GB/T 603-2002, ISO 6353-1: 1982, NEQ)
GB/T 609 Chemical reagent—General method for the determination of total nitrogen (GB/T 609-2006, ISO 6353-1: 1982, NEQ)
GB/T 6682 Water for analytical laboratory use—Specification and test methods (GB/T 6682-2008, ISO 3696: 1987, MOD)
GB/T 9723-2007 Chemical reagent—General rule for flame atomic absorption spectrometric analysis
GB/T 9724 Chemical reagent—General for the determination of pH (GB/T 9724-2007, ISO 6353-1: 1982, NEQ)
GB/T 9727 Chemical reagent—General method for the determination of phosphate (GB/T 9727-2007, ISO 6353-1: 1982, NEQ)
GB/T 9729 Chemical reagent—General method for the determination of chloride (GB/T 9729-2007, ISO 6353-1: 1982, NEQ)
GB/T 9735 Chemical reagent—General method for the determination of heavy metals (GB/T 9735-2008, ISO 6353-1: 1982, NEQ)
GB/T 9738 Chemical reagent—General method for the determination of water insoluble matter (GB/T 9738-2008, ISO 6353-1: 1982, NEQ)
GB/T 9739 Chemical reagent—General method for the determination of iron (GB/T 9739-2006, ISO 6353-1: 1982, NEQ)
GB 15346 Chemical reagent—Packaging and marking
HG/T 3484 Chemical reagent—Standard of clear liquor, made from glass dust, and standard of transparence
HG/T 3921 Chemical reagent—Regulations for sampling and acceptance
3 Characteristics
This reagent is transparent crystal or powder, soluble in water.

Foreword i
1 Scope
2 Normative references
3 Characteristics
4 Specifications
5 Tests
6 Inspection rules
7 Packaging and marking
Annex A (Informative) Treatment and regeneration method for strong acidic cation exchange resin
A.1 Instruments
A.2 Treatment method
A.3 Regeneration method