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Determination of NO_2 in Air by Chemiluminescence Detection

Zhang Hui-tan

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Abstract

Nitrogen dioxide absorbed by 0.2% triethanolamine(TEA)solution and transformed quantatively to nitrite was detected by potassium bromate-Acid Chrome Blue K(ACBK)chemiluminescence system.The new method was developed to detect nitrogen dioxide in atmosphere,and the linear range for nitrite was 6.0×10-9～1.0×10-5 mol/L with a detection limit of 8.5×10-11mol/L,relative standard deviation(RSD)of 1.8% for 1.0×10-8mol/L nitrite solution and 2.2% for 1.0×10-6mol/L nitrite solution.The method developed was applied to determining nitrogen dioxide in atmosphere with satisfactory results.

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What this paper is about

Nitrogen dioxide absorbed by 0.2% triethanolamine(TEA)solution and transformed quantatively to nitrite was detected by potassium bromate-Acid Chrome Blue K(ACBK)chemiluminescence system.The new method was developed to detect nitrogen dioxide in atmosphere,and the linear range for nitrite was 6.0×10-9～1.0×10-5 mol/L with a detection limit of 8.5×10-11mol/L,relative standard deviation(RSD)of 1.8% for 1.0×10-8mol/L nitrite solution and 2.2% for 1.0×10-6mol/L nitrite solution.The method developed was applied to determining nitrogen dioxide in atmosphere with satisfactory results.

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Available abstract

Nitrogen dioxide absorbed by 0.2% triethanolamine(TEA)solution and transformed quantatively to nitrite was detected by potassium bromate-Acid Chrome Blue K(ACBK)chemiluminescence system.The new method was developed to detect nitrogen dioxide in atmosphere,and the linear range for nitrite was 6.0×10-9～1.0×10-5 mol/L with a detection limit of 8.5×10-11mol/L,relative standard deviation(RSD)of 1.8% for 1.0×10-8mol/L nitrite solution and 2.2% for 1.0×10-6mol/L nitrite solution.The method developed was applied to determining nitrogen dioxide in atmosphere with satisfactory results.

Key concepts: Chemiluminescence, Nitrogen dioxide, Triethanolamine, Nitrite, Detection limit, Chemistry, Potassium bromate, Relative standard deviation

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