Charcoal Sampling and Gas Chromatographic Determination of N, N-dimethylformamide in Air Samples from a Polyurethane Plant

Valentino Rimatori ； Giovanni Carelli

《Scandinavian Journal of Work, Environment & Health》 8卷1期 (1982/01) Pp. 20-23

並列摘要

A charcoal sampling method and a gas chromatographic determination of N,N-dimethylformamide in the air of a plant producing polyurethane lumps is described. The collection efficiency was checked by drawing standard N, N-dimethylformamide air mixtures through the sampling tube at 0.1 1/min and detecting the organic vapors spectrophotometrically at 215.4 nm. At 1,000 mg/m^3, samplings could be carried out for 190 min with negligible N, N-dimethylformamide losses (lower than 1%). The analysis of N, N-dimethylformamide was performed by gas chromatography on Porapack Q and Tenax GC after extraction with 2 ml of acetone/100 mg of charcoal, with a mean recovery of 90 (SD 2) %, in the range of 0.05-0.5 mg of N, N-dimethylformamide/100 mg of charcoal. The relative standard deviation of the entire procedure was 3.5 %. Because of the good adsorbing efficiency of the characoal, short-term sampling could be carried out at a relatively high N, N-dimethylformamide concentration. Stationary and personal sampling resulted in mean values ranging between 1.26 and 1.60 mg/m^3. The method is particularly suitable in instances where other pollutants are present, and therefore it can be used also for other work areas as well.

並列關鍵字

air pollution ； frontal analysis ； industrial hygiene