Standard No.:	GB 6682-1992
English Name:	Water for analytical laboratory use--Specification and test methods
Chinese Name:	分析实验室用水规格和试验方法
Chinese Classification:	G04    Basic standards and general methods
Professional Classification:	GB    National Standard
ICS Classification:	71.040.40 71.040.40    Chemical analysis 71.040.40
Source Content Issued by:	CSBTS
Issued on:	1992-06-02
Implemented on:	1993-5-1
Status:	superseded
Superseded by:	GB/T 6682-2008 Water for analytical laboratory use - Specification and test methods
Superseded on:	2008-11-1
Superseding:	GB 6682-1986 Water for Analytical Laboratory Use - Specification and Test Method
Target Language:	English
File Format:	PDF
Word Count:	2500 words
Translation Price(USD):	60.0
Delivery:	via email in 1 business day

This standard is equivalent to international standard ISO 3696 (1987) Water for Analytical Laboratory Use - Specification and Test Methods 1. Subject and the Aspect(s) Covered This standard regulates classes, specifications and test method of water for analytical laboratory use. This standard is applicable to water for test use of chemical analysis and inorganic trace analysis. Water of different classes can be adopted according to practical conditions. 2. Normative Reference GB/T601-1988 Chemical Reagent - Preparations of Standard Volumetric Solutions GB 602 Chemical Reagent - Preparations of Standard Solutions for Impurity GB/T 603-2002 Chemical Reagent - Preparations of Reagent Solutions for Use in Test Methods GB 9724 Chemical Reagent - General Rules for the Determination of pH GB 9740 Chemical Reagent - General Method for the Determination of Dry Residue after Evaporation 3. Appearance Water for analytical laboratory use shall be colorless transparent liquid through visual observation. 4. Classes Raw water for analytical laboratory use shall be drinking water or water with appropriate purity. Water for analytical laboratory use is classified into three classes: class-I water, class-II water and class-III water.