GB/T 609-2018 (English Version) PDF

Standard No.: GB/T 609-2018
Language: Chinese, Available in English version
Release Date: 2018
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 609-2018
Replace: GB/T 609-2006

Scope: This standard specifies the general method for the determination of the total amount of trace inorganic nitrogen compounds by Nessler's reagent colorimetric method and salicylic acid-hypochlorite colorimetric method. This standard applies to the determination of the total amount of trace inorganic nitrogen compounds (including nitrate, nitrite and ammonium salt) in chemical reagents. The detection range of Nessler's reagent visual colorimetry and spectrophotometry is 0.05 μg/mL~0.8 μg/mL (calculated as N); the detection of salicylic acid-hypochlorite visual colorimetry and spectrophotometry The range is 0.04 μg/mL~1 μg/mL (calculated as N).

GB/T 609-2018 Referenced Document

GB/T 601 Chemical reagent.Preparations of reference titration solutions
GB/T 602 Chemical reagent--Preparations of standard solutions for impurity
GB/T 603 Preparation of preparations and products used in chemical reagent test methods*， 2023-08-06 Update
GB/T 6682 Water for analytical laboratory use.Specification and test methods
GB/T 9721 chemical reagent General rules for the molecular absorption spectrophotometry (ultraviolet and visible)

2018 GB/T 609-2018 Chemical reagent.General method for the determination of total nitrogen
2006 GB/T 609-2006 Chemical reagent General method for the determination of total nitrogen
1988 GB/T 609-1988 Chemical reagent--General method for the determination of total nitrogen
0000 GB 609-1977