Detection of small quantities of gaseous contamination in a gas by using a differential optical method

被引:3
作者
Djaozandry, R
St Arnaud, JM [1 ]
Bose, TK
Frechette, MF
机构
[1] Univ Quebec, Inst Rech Hydrogene, Dept Phys, Trois Rivieres, PQ G9A 5H7, Canada
[2] Inst Rech Hydro Quebec, Varennes, PQ J3X 1S1, Canada
关键词
D O I
10.1063/1.1148772
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
We present a differential optical method (DOM) based on an interferometric technique at lambda = 632.9 nm, for the detection of small amounts of gaseous contaminants in a gas, The DOM is based on comparative measurements of the refractive index of pure gas and mixtures of gaseous contaminant and the pure gas, This method allows detection of small amounts (ppmv) of contaminant as a function of pressure and temperature, The DOM was applied to gaseous SF6 contaminated with 0.49% and 10.5% of CO2 at 294.1+/-0.5 K, up to 0.5 MPa and 350, 700, 1244, and 1489 ppmv of water vapor at 304.1+/-0.1 K, up to 1 MPa, Comparative measurements with a hygrometer (MCM, Dewmatic 600 D) show good agreements at 350+/-25 and 700+/-50 ppmv of water, (C) 1998 American Institute of Physics, [S0034-6748(98)04203-8].
引用
收藏
页码:1398 / 1402
页数:5
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