GB/T 603-2002 Chemical reagent--Preparations of reagent solutions for use in test methods (Text of Document is in English) - Beijing translation compay

1. Scope

This standard regulates method for preparation of reagent solution for use in test method.

This standard is applicable to preparation of reagent and substance used for analysis on chemical reagent, and it can also be used by other industries.
The following documents contain contents which, through reference in this text, composite provisions of this standard. For dated reference, subsequent amendments (excepting corrigenda content)to, or revisions of, any of these publications do not apply. Parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. For undated references, the latest edition of the normative document referred to applies.

GB/T 601-2002 Chemical Reagent - Preparations of Standard Volumetric Solutions

GB/T602-2002 Chemical Reagent - Preparations of Standard Solutions for Impurity

GB/T 6682-1992 Water for Analytical Laboratory Use - Specification and Test Methods (neq ISO 3696:1987)

GB/T9733-1988 Chemical Reagent - General Method for the Determination of Carbonyl Compounds (eqv ISO 6353-1:1982)

3. General Provisions

3.1 Unless otherwise stated herein, purity of reagent shall be higher than purity of analytical reagent, standard volumetric solution and standard solution used for measurement of impurity shall be prepared according to provisions of GB/T 601-2002 and GB/T 602-2002, and water for laboratory use shall comply with specifications of class-III water of GB/T 6682-1992.

3.2 When solution has turbidity and deposit or its color changes, new solution shall be prepared.

3.3 Symbol "%" used to express solution herein refers to mass fraction of solution; and only symbol "%" of ethanol (95%) refers to its volume fraction.