发明名称 |
METHOD FOR THE DETECTION OF A GAS USING PHOTOACOUSTIC SPECTROSCOPY |
摘要 |
In a process for the detection of a first gas in a gas mixture comprising a second gas, the absorption spectre of which interferes with the absorption spectre of the first gas, a photoacoustic measurement is carried out in the presence of a third gas which in combination with the first or the second gas exhibits kinetic cooling. During measurement the gas mixture is influenced by pulsating laser light having a constant repetition frequency where the frequency of the laser light is varied gradually. The measurement comprises at least one detection of the phase of the photoacoustic signal as a function of the laser light frequency. The invention further relates to an apparatus for carrying out the invention. |
申请公布号 |
WO9002935(A1) |
申请公布日期 |
1990.03.22 |
申请号 |
WO1989DK00211 |
申请日期 |
1989.09.12 |
申请人 |
FLS AIRLOQ AS |
发明人 |
HAMMERICH, MADS;HENNINGSEN, JES, O.;OLAFSSON, ARI |
分类号 |
G01N21/00;G01N21/17;G01N29/00;(IPC1-7):G01N21/17 |
主分类号 |
G01N21/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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