Development of a Sampling and Analysis Method for 4-Vinyl-1-cyclohexene in Air

• Published in: Journal of Occupational Health 2008-03, Vol.50 (2), p.122-129
• Main Authors: Kongtip, Pornpimol, Tangprakorn, Bantoon, Yoosook, Witaya, Chantanakul, Suttinun
• Format: Article
• Language: English
• Subjects: 4‐Vinyl‐1‐cyclohexene; Adsorption; Air flow; Air Pollutants, Occupational - analysis; Charcoal; Chemical Industry; Chromatography, Gas - methods; Cyclohexenes - analysis; Desorption; Environmental Monitoring - methods; Factories; Flow rates; Gas chromatography; Humans; Ionization; Occupational Exposure - analysis; Occupational health; Sampling and analysis; Vinyl Compounds - analysis; Working conditions
• ISSN: 1341-9145; 1348-9585; 1348-9585
• DOI: 10.1539/joh.L7115

Abstract:Development of a Sampling and Analysis Method for 4-Vinyl-1-cyclohexene in Air:Pornpimol KONGTIP, et al. Department of Occupational Health and Safety, Faculty of Public Health, Mahidol University, Thailand―The purpose of this research was to develop an applicable sampling and analytical method to determine airborne 4-vinyl-1-cyclohexene concentrations which are usually found in the atmosphere of polybutadiene factories. A solid sorbent tube, containing two sections (100mg in the front and 50mg in the back) of activated coconut-shell charcoal was chosen for sampling 4-vinyl-1-cyclohexene vapor. The 4-vinyl-1-cyclohexene in the charcoal samples was desorbed with carbon disulfide and analyzed by gas chromatography equipped with a flame ionization detector. The suitable air flow rate, adsorption capacity, sample storage stability, desorption efficiency and reliability of the method for sampling and analysis of 4-vinyl-1-cyclohexene were evaluated. The method was applied to sampling and analysis of 4-vinyl-1-cyclohexene in the rubber industry. The results indicated a suitable air flow rate of 0.3 to 1.5l/min. The adsorption capacity of 4-vinyl-1-cyclohexene on 100mg of charcoal was 0.2134mg. The 4-vinyl-1-cyclohexene adsorbed on the charcoal was stable for 7 d at room temperature or 21 d in a refrigerated condition. The average percent desorption efficiency of 4-vinyl-1-cyclohexene ranged from 90.45% to 97.04% with the loaded amount ranging from 0.412 to 8.250μg using 1ml carbon disulfide. The limit of detection of 4-vinyl-1-cyclohexene was 0.044 ng. The average percent recoveries (n=6) of 4-vinyl-1-cyclohexene adsorbed on charcoal ranging from 0.46 to 8.87μg were 96.78-102.87% with relative standard deviations (RSDs) of 0.34-1.92%, respectively. The concentrations of 4-vinyl-1-cyclohexene ranged from 0.011 to 0.105mg/m3 in the working environment of a polybutadiene factoty. (J Occup Health 2008;50:122-129)