Standard No.:	HG/T 3696.2-2011
Chinese Name:	无机化工产品 化学分析用标准溶液、制剂及制品的制备 第2部分：杂质标准溶液的制备
English Name:	Inorganic chemicals for industrical usePreparations of standard and reagent solutions for chemical analysisPart 2: Preparations of standard solutions for impurity
Professional Classification:	G10 Inorganic chemicals in general
ICS Classification:	71.060.01 Inorganic chemicals in general 71.060.99 Other inorganic chemicals
Issued by:
Issued on:	2011-12-20
Implemented on:	2012-07-01
Status:	VALID
Replace:	HG/T3696.2-2002 Inorganic chemical products Preparations of standard solutions for chemical analysis
Language:	English
File Format:	PDF
Word Count:
Price(USD):	please email coc@codeofchina.com for quotation
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1 Scope

This part specifies the methods of preparing standard solutions for impurity for chemical analysis of inorganic chemicals for industrial use.

It applies to the preparation of standard solution containing exact amount of certain element, ion or molecule in certain volume required for the determination of impurities in analysis of inorganic chemicals for industrial use. It may also be used for chemical analysis of other chemical products for industrial use.

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the dated edition is applicable to this document. For undated references, the latest edition of the referenced document (including any amendments) applies.

GB/T 6682-2008 Water for analytical laboratory use - Specification and test methods
HG/T 3696.1 Inorganic chemicals for industrial use - Preparations of standard and reagent solutions for chemical analysis - Part 1: Preparations of standard volumetric solutions
HG/T 3696.3 Inorganic chemicals for industrial use - Preparations of standard and reagent solutions for chemical analysis - Part 3: Preparations of reagent solutions

3 General requirements

3.1 Unless otherwise specified, the water adopted in this part refers to Grade 3 water specified in GB/T 6682-2008.

3.2 The purity of any reagent used in this part is above analytically pure. Surface treatment shall be conducted before applying easily oxidized metals.

3.3 Unless otherwise specified, the required standard and reagent solutions in annexes of this part are prepared in accordance with HG/T 3696.1 and HG/T 3696.3.

3.4 In diluting standard solutions for impurity, accurate measuring instruments (pipette and volumetric flask) shall be used for integral multiple dilution, and the volume of standard solution measured each time shall not be less than 1.00mL.