GB/T 23773-2009 Active National standards

GB/T 23773-2009 Inorganic chemicals for industrial use—General method for determination of Ammonium content—Nessler's reagent colorimetric method

Publish Date: 2009-05-13 Implement Date: 2010-01-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Basic Information

Standard Code: GB/T 23773-2009

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Inorganic chemical raw materials

ICS Name: Comprehensive Inorganic Chemistry

Publish Date: 2009-05-13

Implement Date: 2010-01-01

Pages: 8 pages

Scope

This standard specifies a general method for determining the ammonium content in inorganic chemical products: the Nessler's reagent colorimetric method. It includes a method summary, safety tips, general provisions, reagents, instruments, equipment, analysis steps, and result calculation.
This standard is applicable to the determination of trace ammonium ions in inorganic chemical products. When the volume of the test solution is 100 mL, the ammonium ion concentration (NH4) shall be ≤2 mg/L. When the volume of the test solution is 100 mL, the minimum detectable concentration by visual observation shall be 0.02 mg/L. When using a 1 cm pathlength cuvette in spectrophotometry, the minimum detectable concentration shall be 0.05 mg/L. When ρ(NH4) = 1.0 mg/L, the sensitivity is approximately 0.2 absorbance units.