GB/T 21057-2007 (English Version) PDF

Standard No.: GB/T 21057-2007
Language: Chinese, Available in English version
Release Date: 2007
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 21057-2007

Scope: This standard specifies the general method for the determination of fluorine content in inorganic chemical products - ion selective electrode method. This standard applies to the determination of fluorine content in inorganic chemical products. The standard specifies the determination method of fluorine content. When preparing the test solution, it should refer to the relevant standards of the product to be analyzed and make necessary modifications to this standard to make it suitable for the determination of the product. This standard applies to the mass concentration of fluoride ions in the test solution taken from 0.04 μg/mL to 40 μg/mL.

GB/T 21057-2007 Referenced Document

GB/T 6682-1992 Water for analytical laboratory use--Specification and test methods
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

2007 GB/T 21057-2007 Inorganic chemicals for industrial use- General method for determination of fluorine content- Ion selective electrode method