GB/T 23943-2009 (English Version) PDF

Standard No.: GB/T 23943-2009
Language: Chinese, Available in English version
Release Date: 2009
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 23943-2009

Scope: This standard specifies the general method for the determination of hexavalent chromium in inorganic chemical products - the principle of diphenylcarbazide spectrophotometry, safety tips, general regulations, reagents, instruments, equipment, analysis procedures and result calculations. This standard is applicable to the determination of hexavalent chromium ions in inorganic chemical products. The hexavalent chromium ion (Cr) is linear in the range of 0.004mg/L~1.000mg/L. The volume of the test solution is 50mL, using a cuvette with an optical path length of 3cm, the minimum detection amount of this method is 0.2μg hexavalent flower chromium, and the minimum detection concentration is 0.004mg/L; use a colorimetric cuvette with an optical path length of 1cm Dish, the upper limit concentration of determination is 1.000mg/L (see Appendix A for ions that do not interfere with the determination).

GB/T 23943-2009 Referenced Document

GB/T 6682-2008 Water for analytical laboratory use.Specification and test methods
HG/T 3696.2 Inorganic chemicals for industrical use.Preparations of standard and reagent solutions for chemical analysis.Part 2: Preparations of standard solutions for impurity *， 2011-12-20 Update
HG/T 3696.3 Inorganic chemicals for industrical use.Preparations of standard and reagent solutions for chemical analysis.Part 3: Preparations of reagent solutions *， 2011-12-20 Update

2009 GB/T 23943-2009 Inorganic chemicals for industrial use.General method for the determination of chromium(Ⅵ)content.1,5-Diphenylcarbohydrazide spectrophotometric method