Infrared spectrometry portable

The unique appearance of an infrared spectrum has resulted in the extensive use of infrared spectrometry to characterize such materials as natural products, polymers, detergents, lubricants, fats and resins. It is of particular value to the petroleum and polymer industries, to drug manufacturers and to producers of organic chemicals. Quantitative applications include the quality control of additives in fuel and lubricant blends and to assess the extent of chemical changes in various products due to ageing and use. Non-dispersive infrared analysers are used to monitor gas streams in industrial processes and atmospheric pollution. The instruments are generally portable and robust, consisting only of a radiation source, reference and sample cells and a detector filled with the gas which is to be monitored. 

Fourier transform/infrared spectrometry (FT/IR) detects and identifies CWAs by measuring the infrared spectrum of the air sample noninvasively and instantly (Mukhopadhyay 2004). Considering the interference of water and carbon dioxide, characteristic absorbance peaks in the low-wave number region are used as the specific marker. Portable FT-IR equipment is commercially available. IGA-1700 (Otsuka Electronics, Japan) and DX-4000 (Temet, Finland) showed... 

Carbon dioxide may be readily analyzed by various instrumental techniques, such as IR, GC, and GC/MS. Many portable infrared analyzers are available commercially for rapid, on site monitoring of CO2. Also, it can be analyzed by GC using a TCD or an FID. It readily may be identified by mass spectrometry from its characteristic ionic mass 44. Dissolved CO2 in water... 

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