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ISO 8186:1989 Ambient air - Determination of the mass concentration of carbon monoxide - Gas chromatographic method
standard by International Organization for Standardization, 07/01/1989
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The procedure is intended for the measurement of less than 25 mg/m3 although it can be successfully applied to concentrations up to 1 000 mg/m3 at 25 C and 101,3 kPa. Concentrations of less than 1 mg/m3 can be obtained with careful operation. The automatic technique is continuous only in so far as several discrete air samples can be drawn and analysed each hour.