HJ 502-2009
Water quality.Determination of volatile phenolic compounds.Bromine method (English Version)

Standard No.

HJ 502-2009

Language

Chinese, Available in English version

Release Date

2009

Published By

Professional Standard - Environmental Protection

Latest

HJ 502-2009

Replace

GB/T 7491-1987

Scope

This standard specifies the sodium indigo disulfonate spectrophotometric method for the determination of ozone in ambient air. This standard applies to the determination of ozone in ambient air. The measurement of ozone in the air of relatively closed environments (such as indoors, cars, etc.) can also refer to this standard. When the sampling volume is 30L, the detection limit of this standard for measuring ozone in the air is 0.010 mg/m, and the lower detection limit is 0.040 mg/m. When the sampling volume is 30L and the mass concentration of the absorption liquid is 2.5 μg/ml or 5.0 μg/ml, the upper limit of determination is 0.50 mg/m or 1.00 mg/m respectively. When the ozone mass concentration in the air exceeds the upper limit, the sampling volume can be appropriately reduced.

HJ 502-2009 Referenced Document

• GB 7489-1987 Water guality-Determination of dissolved oxyqen-Iodometric method
• HJ/T 91 Technical Specifications Requirements for Monitoring of Surface Water and Waste Water

HJ 502-2009 history

• 2009 HJ 502-2009 Water quality.Determination of volatile phenolic compounds.Bromine method

HJ 502-2009 Water quality.Determination of volatile phenolic compounds.Bromine method has been changed from GB/T 7491-1987 Water quality--Determination of volatile phenolic compounds--After distillation with bromine method.