Citation: Bin QI, Yan MA, Xiao Qian LI, Xiao Yan TANG. Determination of the Amplification Factor for 2-Hydroxy-ethylperoxy Radicals in PERCA[J]. Chinese Chemical Letters, ;2006, 17(7): 957-960. shu

Determination of the Amplification Factor for 2-Hydroxy-ethylperoxy Radicals in PERCA

Bin QI ^1, ,
Yan MA ¹ ,
Xiao Qian LI ² ,
Xiao Yan TANG ²

1.
School of Chemistry and Material Sciences, Shaanxi Normal University, Xian 710062;
2.
College of Environmental Sciences, Peking University, Beijing 100871

Received Date: 28 September 2005

A new method is proposed to determine the amplification factor for 2-hydroxy ethylperoxy radicals (HOC₂H₄O₂·) in chemical amplifier.The radical source comes from the reaction of excess ethene with HO·radicals generated in the photolysis of water vapor at the wave length of 185 nm in air in a flow tube.This produces a radical source which contains equal amount of HO₂· and HOC₂H₄O₂·.The amplification factor is derived from the slopes of the lines between produced NO₂ in chemical amplifier and total initial radical concentrations measured for the source of HO₂·and that of the same amount of HO₂·and HOC₂H₄O₂·respectively.The amplification factor of HOC₂H₄O₂·was similar to that of HO₂·, indicating that HOC₂H₄O₂·can be measured with the same sensitivity as HO₂· by chemical amplifier.
- 2-Hydroxy ethylperoxy radical,
- amplification factor,
- chemical amplification
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