This standard specifies the preparation method of standard solutions for the determination of impurities in chemical reagents. This standard is applicable to the preparation of solutions containing accurate quantities of substances (elements, ions or molecules) per unit volume, applicable to the determination of impurities in chemical reagents, and can also be used by other industries.
GB/T 602-2002 history
2002GB/T 602-2002 Chemical reagent--Preparations of standard solutions for impurity
1988GB 602-1988 Preparation of Standard Solution for Determination of Impurities in Chemical Reagents