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1000
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Abstract/Summary
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This analytical method is a validated procedure for the determination of carbon monoxide in workplace air after personal or stationary sampling. Portable, electrically‐powered gas measurement devices with integrated air sampling are used. The sample flow rate is set to 0.5 or 2.0 L/min. The air sample is transferred to the measurement cell by means of an internal sampling pump. Measurement is carried out by comparison of the IR signals of a concentration‐dependent measurement cuvette and the IR signal of the sealed reference cuvette. The current CO concentration is calculated electronically from the respective differences of these cuvettes and then immediately displayed as the measurement result for the CO concentration. This method is suitable for measurement at the workplace over long time periods as well as for short‐term measurements. Also readings of the current CO concentration can be taken any time. The limit of quantification (LOQ) is 1.6 ppm in the measurement range of 0 to 100 ppm. Joint Publication of the Analytical Subcommittee of the Chemistry Board of Experts of the Expert Committee Raw Materials and Chemical Industry of the German Social Accident Insurance and the working group “Air Analyses” of the Permanent Senate Commission of the Deutsche Forschungsgemeinschaft for the Investigation of Health Hazards of Chemical Compounds in the Work Area.
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