MASS-SPECTROMETRIC IN-SITU DETERMINATION OF NO2 IN GAS-MIXTURES BY RESONANCE-ENHANCED MULTIPHOTON IONIZATION

被引：6

作者：

BENTER, T ^{[1
]}

LIESNER, M ^{[1
]}

SAUERLAND, V ^{[1
]}

SCHINDLER, RN ^{[1
]}

机构：

[1] CHRISTIAN ALBRECHTS UNIV KIEL,INST CHEM PHYS,D-24098 KIEL,GERMANY

来源：

FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY | 1995年 / 351卷 / 06期

关键词：

D O I：

10.1007/BF00322721

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

One- and two-colour photoionisation spectra for NO2 have been investigated using a time of flight mass spectrometer as detector to find the most efficient REMPI process for analytical applications. Two different inlet systems have been employed: a pulsed supersonic jet expansion stage and a flow reactor. Selective and sensitive mass spectrometric determinations of free NO2 have been possible even in the presence of high concentrations of organic nitrates, HNO3 and other NO2 precursors. Employing two-colour (1+1' + 1) excitation using a concentration of HNO3 less than or equal to 5.10(14) molecules/cm(3) a detection limit of 5.10(11) molecules/cm(3) has been found for NO2 whereas in the absence of HNO3 a detection limit of 5.10(10) molecules/cm(3) is reported.

引用

页码：489 / 492

页数：4

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