title: Development of a sampling and analysis method for 4-vinyl-1-cyclohexene in air.
abstract: 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 (100 mg in the front and 50 mg 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 1.5 l/min. The adsorption capacity of 4-vinyl-1-cyclohexene on 100 mg of charcoal was 0.2134 mg. 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 8.250 microg using 1 ml 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 8.87 microg 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 0.105 mg/m(3) in the working environment of a polybutadiene factory.
authors.affiliation: Department of Occupational Health and Safety, Faculty of Public Health, Mahidol University, Bangkok, Thailand. phpkt@mahidol.ac.th
authors.forename: Pornpimol
authors.initials: P
authors.lastname: Kongtip
authors.forename: Bantoon
authors.initials: B
authors.lastname: Tangprakorn
authors.forename: Witaya
authors.initials: W
authors.lastname: Yoosook
authors.forename: Suttinun
authors.initials: S
authors.lastname: Chantanakul
mesh_terms: D000327:Adsorption; D000395:Air Pollutants, Occupational / Q000032:analysis*; D002606:Charcoal; D002617:Chemical Industry; D002849:Chromatography, Gas / Q000379:methods; D053138:Cyclohexenes / Q000032:analysis*; D004784:Environmental Monitoring / Q000379:methods*; D006801:Humans; D016273:Occupational Exposure / Q000032:analysis; D014753:Vinyl Compounds / Q000032:analysis*
chemical_list: D000395:Air Pollutants, Occupational; D053138:Cyclohexenes; D014753:Vinyl Compounds; D002606:Charcoal; C012606:4-vinyl-1-cyclohexene dioxide