Aimed at monitoring emission of organic gases such as CH4, C2H6, C3H8, iso-C4H10, n-C4H10, C2H4, C3H6, C2H2, CO, and CO2, from coal mines, petroleum refineries, and other plants, a Fourier Transform Infrared (FT-IR) spectrometer was used to develop a portable gas analyzer for patrolling and examining gas exhaust. Firstly, structure of the instrument was introduced. Then, a spectral analysis approach was presented. Finally, instrument was tested with standard gases and with actual gases emitted from a petroleum refinery. For the latter test, a gas chromatograph (GC) was used as a reference instrument. The test results showed that the detection limit of every component of analyte was less than 10 × 10−6. The maximum test error of every analyte was less than 15 × 10−6 when its practical concentration was no more than 500 × 10−6. A final comparison showed that the result curves of analytes obtained with FT-IR spectrometer almost overlapped with those obtained with GC, and their resulting noise was less than 6.4% when the practical gas concentration was above 100 × 10−6. As a result, our instrument was suitable to be used as a portable instrument for monitoring exhaust gases.
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机译：在监测有机气体如CH 4，C 2 H 6，C 3 H 8，异C4H10，正C4H10，C2H4，C3H6，C2H2，CO，和CO 2的排放量的目的，从煤矿，石油精炼厂，和其他植物中，傅立叶变换红外（ FT-IR）光谱仪用于开发便携式气体分析仪，用于巡逻和检查气排气排气。首先，介绍了仪器的结构。然后，提出了一种光谱分析方法。最后，用标准气体测试仪器，并从石油炼油厂发出的实际气体。对于后一试，将气相色谱仪（GC）用作参考仪器。测试结果表明，分析物的每个组分的检测限小于10×10-6。当其实际浓度不超过500×10-6时，每个分析物的最大测试误差小于15×10-6。最后的比较表明，用FT-IR光谱仪获得的分析物的结果曲线几乎与GC获得的那些，当实际气体浓度高于100×10-6时，它们的所得噪声小于6.4％。结果，我们的仪器适合用作用于监测废气的便携式仪器。
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