Improved analyzer for nitrogen dioxide by laser-induced fluorescence technique
Improved analyzer for nitrogen dioxide by laser-induced fluorescence technique
复制标题
采用激光诱导荧光技术改进二氧化氮分析仪
DOI：
10.1016/j.atmosenv.2003.08.023
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发表时间：
2003
影响因子：
5
通讯作者：
Y. Kajii
中科院分区：
文献类型：
--
作者：
J. Matsumoto;Y. Kajii
改进了一种紧凑、快速响应的单波长激发激光诱导荧光（LIF）技术测量大气NO2的仪器。利用更强大的脉冲激光的单程对准来实现检测限（LOD）的pptv（=10 - 12体积）。结果，1分钟平均值的LOD达到1.8pptv（S/N=1）。为了准确地确定仪器零点，利用涂有二氧化钛（TiO 2）和羟基磷灰石的混合物的NO2洗涤管来消除颗粒的干扰。因此，它被证实，改进的单波长激光诱导荧光仪器与洗涤器的组合是合理的，用于测量大气NO2。
A compact, fast-response instrument for measuring atmospheric NO2by single-wavelength excitation laser-induced fluorescence (LIF) technique was improved. A single-pass alignment of a more powerful, pulsed laser was utilized to realize the pptv (=10−12by volume) of the limit of detection (LOD). As a result, the LOD reached 1.8pptv for 1-min averaging (S/N=1). To determine the instrumental zero accurately, interference by particles was cancelled out utilizing an NO2scrubber tube coated with a mixture of titanium dioxide (TiO2) and hydroxyapatite. Consequently, it was confirmed that the combination of the improved single-wavelength LIF instrument with the scrubber was reasonable for measuring atmospheric NO2.