4. 1-Etylo-2-pirolidon. Metoda oznaczania w powietrzu na stanowiskach pracy z zastosowaniem chromatografii gazowej

Abstract

1-Ethyl-2-pyrrolidone (NEP) is a colorless liquid with ammonia-like odor. It belongs to the organic compounds from the lactam group, i.e., the ethyl derivative of 2-pyrrolidone. 1-Ethyl-2-pyrrolidone, due to similar physicochemical proper-ties, is used in industry as a substitute for 1-methyl-2-pyrrolidone (NMP). It is used as a solvent in polymer, petroche-mical, paint and varnish, and electronic industries. Moreover, it has been used as a cleaning agent for removing paints, varnishes, adhesives, oil or grease. 1-Ethyl-2-pyrrolidone can be absorbed through the skin as well as through inhalation and food. The aim of the this study was to develop and validate a method for determining 1-ethyl-2-pyrrolidone in work-place air. The developed method of NEP determination consists in adsorption of vapors of this substance on coconut shell charcoal, extraction with a dichloromethane and chromatographic analysis of the obtained solution. The study was performed using a gas chromatograph coupled with mass spectrometer (GC-MS), equipped with a polar ZB-WAXplus capillary column (length 60 m, diameter 0.25 mm and the film thickness of the stationary phase 0.5 µm). The developed method is linear in the concentration range of 15.0–320.0 µg/ml, which corresponds to the range of 1.5–32.0 mg/m3 for a 10-L air sample. The analytical method described in this paper makes it possible to determine 1-ethyl-2-pyrrolidone in workplace air in the presence of comorbid substances. The method is precise, accurate and it meets the criteria for procedure for measuring chemical agents listed in Standard No. PN-EN 482. Developed method of determining 1-ethyl- 2-pyrrolidone at workplace air has been recorded as an analytical procedure (see Appendix). This article discusses the problems of occupational safety and health, which are covered by health sciences and environmental engig.