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

A charcoal sampling method and a gas Chromatographie 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 detec...

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Bibliographic Details
Published in:Scandinavian Journal of Work, Environment ＆ Health Environment ＆ Health, 1982-03, Vol.8 (1), p.20-23
Main Authors: Rimatori, Valentino, Carelli, Giovanni
Format: Article
Language:English
Subjects:
Adsorption
Air Pollutants - analysis
Air Pollutants, Occupational - analysis
air pollution
Air sampling
Charcoal
Chromatography, Gas - methods
dimethylformamide
Dimethylformamide - analysis
Formamides
Gas chromatography
Gas samples
health and welfare
Industrial hygiene
Industry
Methods
monitoring instruments
occupational exposure
plastics industry
pollution
Polyurethanes
sampling methods
Solvents
spectrophotometry
Standard deviation
Urine
Vapors
working conditions
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Summary:A charcoal sampling method and a gas Chromatographie 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.
ISSN:0355-3140
1795-990X
DOI:10.5271/sjweh.2501