2 Importance of Gas Analysis Economic Value Natural Gas (calorific value) Chemical process industry (ethylene,etc.) Electronic industry (reactive gases, H 2 O) Food industry and health care (purity, composition) Environmental regulations Industrial stack emissions (NO x, SO 2, HCl, etc.) Automotive gases (CO, CO 2, C 3 H 8, NO) Occupational hygiene (VOC, particles) Ambient air quality (Benzene, O 3, CH 4, N 2 O, VOC, etc.) Legislation Breath Analysis (ethanol) Odor Control (n-butanol)
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