GBZ/T 300.9-2017
Determination of Toxic Substances in Workplace Air Part 9: Chromium and Its Compounds (English Version)

Standard No.

GBZ/T 300.9-2017

Language

Chinese, Available in English version

Release Date

2017

Published By

Occupational Health Standard of the People's Republic of China

Latest

GBZ/T 300.9-2017

Replace

GBZ/T 160.7-2004

Scope

This part of GBZ/T300 specifies the acid digestion-flame atomic absorption spectrometry, solution absorption-diphenylcarbazide spectrophotometry, trivalent chromium and hexavalent chromium respectively determination methods of chromium and its compounds in the workplace air. This part applies to the detection of the concentration of aerosol chromium and its compounds (including hexavalent chromium compounds such as chromium trioxide, chromate and dichromate, and trivalent chromium compounds) in the air of workplaces.

GBZ/T 300.9-2017 Referenced Document

• GBZ 159 Specifications of air sampling for hazardous substances monitoring in the workplace
• GBZ/T 210.4 Guide for establishing occupational health standards-Part 4: Determination methods of air chemicals in workplace

GBZ/T 300.9-2017 history

• 2017 GBZ/T 300.9-2017 Determination of Toxic Substances in Workplace Air Part 9: Chromium and Its Compounds
• 2004 GBZ/T 160.7-2004 Methods for determination of chromium and its compounds in the air of workplace
• 1996 GB/T 16020-1995 Workplace air--Determination of chromium trioxide--Flame atomic absorption spectrophotometric method

GBZ/T 300.9-2017 Determination of Toxic Substances in Workplace Air Part 9: Chromium and Its Compounds has been changed from GBZ/T 160.7-2004 Methods for determination of chromium and its compounds in the air of workplace.