Chlorobenzene. Determination in workplace air
Journal Title: Podstawy i Metody Oceny Środowiska Pracy - Year 2019, Vol 35, Issue 1
Abstract
Chlorobenzene is a colorless, flammable liquid that has an almond-like odor. It is used in industry as a solvent: resins, paints and fats, raw material for the production of plastics, as well as for the production of phenol, aniline and nitrobenzene. Occupational exposure to chlorobenzene vapors can occur through inhalation, absorption through the skin or ingestion. Harmful if inhaled, it causes skin irritation. Long-term exposure affects the central nervous system. The study aimed to amend Standard No. PN-Z-04022-03:2001 withdrawn from the Polish set of standards, and tovalidate the method for determining concentrations of chlorobenzene in workplace air in the range from 1/10 to 2 MAC values, in accordance with the requirements of Standard No. PN-EN 482. The study was performed using a gas chromatograph (GC) with a flame ionization detector (FID) equipped with a capillary column HP-5 (30 m × 0.32 mm, 0.25 μm). This method is based on the adsorption of chlorobenzene vapors on activated charcoal, desorption with carbon disulfide, and analyzed by GC-FID. Application of HP-5 column allows selective determination of chlorobenzene in the presence of carbon disulfide, aniline, phenol and nitrobenzene. The measurement range was 2.3–46 mg/m3 for a 15-L air sample. Limit of detection: 6.75 ng/ml and limit of quantification: 20.25 ng/ml. The analytical method described in this paper enables selective determination of chlorobenzene in workplace atmosphere in the presence of other solvents at concentrations from 2.3 mg/m3 (1/10 MAC value). The method is characterized by good precision and accuracy and it meets the criteria for the performance of procedures for measuring chemical agents, listed in Standard No. EN 482. The method may be used for assessing occupational exposure to chlorobenzene and the associated risk to workers’ health. The developed method of determining chlorobenzene 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 engineering.<br/><br/>
Authors and Affiliations
Anna Jeżewska, Agnieszka Woźnica
Keywords
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- EP ID EP518553
- DOI 10.5604/01.3001.0013.0792
- Views 99
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