HJ 479-2009
Ambient air.Determination of nitrogen oxides.N-(1-Naphthyl)ethylene diamine dihydrochloride spectrophotometric method (English Version)

Standard No.

HJ 479-2009

Language

Chinese, Available in English version

Release Date

2009

Published By

Professional Standard - Environmental Protection

Status

Be replaced 2019-01

Replace By

HJ 479-2009(XG1-2018)

Latest

HJ 479-2009(XG1-2018)

Replace

GB/T 15436-1995 GB/T 8969-1988

Scope

This standard specifies a spectrophotometric method for the determination of nitrogen oxides in ambient air. This standard is applicable to the determination of nitrogen oxides, nitrogen dioxide, and nitric oxide in ambient air. The detection limit of this standard method is 0.12μg/10ml absorption solution. When the total volume of the absorption liquid is 10ml and the sampling volume is 24L, the detection limit of nitrogen oxides in the air is 0.005mg/m. When the total volume of the absorption liquid is 50ml and the sampling volume is 288L, the detection limit of nitrogen oxides in the air is 0.003 mg/m. When the total volume of the absorbing liquid is 10ml and the sampling volume is 12~24L, the measurement range of nitrogen oxides in ambient air is 0.020~2.5mg/m.

HJ 479-2009 history

• 0000 HJ 479-2009(XG1-2018)
• 2009 HJ 479-2009 Ambient air.Determination of nitrogen oxides.N-(1-Naphthyl)ethylene diamine dihydrochloride spectrophotometric method

HJ 479-2009 Ambient air.Determination of nitrogen oxides.N-(1-Naphthyl)ethylene diamine dihydrochloride spectrophotometric method has been changed from GB/T 15436-1995 Ambient air--Determination of nitrogen oxides--Saltzman method.

HJ 479-2009 Ambient air.Determination of nitrogen oxides.N-(1-Naphthyl)ethylene diamine dihydrochloride spectrophotometric method has been changed from GB/T 8969-1988 Air quality--Determination of nitrogen oxides in ambient air--Griess-saltzman method.