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1000
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Abstract/Summary
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This analytical method is a validated measurement procedure for the determination of long‐chain phthalates such as diisononyl phthalate, di‐n‐decyl phthalate, diisodecyl phthalate, diundecyl phthalate and didodecyl phthalate present in the workplace air in the gaseous and particulate state. Sampling is performed by drawing a defined volume of air through a cellulose acetate filter located in the sampling head with an adsorption tube filled with silica gel connected downstream using a suitable pump. The flow rate is set to 1 L/min with a recommended air sample volume of 60 or 120 litres after 1 or 2 hours. The collected phthalates are desorbed with methanol and then analysed by means of liquid chromatography using a UV detector (HPLC‐UV). Quantitative determination is based on calibration functions obtained by means of multiple‐point calibrations using an internal standard. The limits of quantification (LOQs) for a phthalate are between 0.003 and 0.26 mg/m3 for an air sample volume of 240 litres. The expanded uncertainty for these parameters is between 16 and 22%, depending on the phthalate and concentration. 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 Monitoring Methods” of the Permanent Senate Commission of the DFG for the Investigation of Health Hazards of Chemical Compounds in the Work Area.
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