Thermal desorption-gas chromatography for the determination of benzene, aniline, nitrobenzene and chlorobenzene in workplace air.
Sampling on Tenax TA of different mesh sizes followed by thermal desorption and gas chromatography was evaluated as a simple method for the determination of benzene, aniline, nitrobenzene and chlorobenzene in the workplace air. An alternative sampling technique in place of pump sampling was developed. Quantitative recoveries were obtained in the mass range 0.04-10 micrograms. It was found that air humidity had no effect on recovery. The charged tubes can be stored at room temperature for 5 days with no change in recovery. The particle size of Tenax TA has no significant effect on adsorption and desorption.
Patil
S F
SF
Department of Chemistry and School of Environmental Sciences, University of Poona, India.
Lonkar
S T
ST
D000395:Air Pollutants, Occupational / Q000032:analysis*; D016902:Air Pollution, Indoor; D000814:Aniline Compounds / Q000032:analysis*; D001554:Benzene / Q000032:analysis*; D002617:Chemical Industry; D002722:Chlorobenzenes / Q000032:analysis*; D002849:Chromatography, Gas / Q000379:methods; D009578:Nitrobenzenes / Q000032:analysis*; D011108:Polymers; D013696:Temperature
D000395:Air Pollutants, Occupational; D000814:Aniline Compounds; D002722:Chlorobenzenes; D009578:Nitrobenzenes; D011108:Polymers; C010514:tenax; C036077:nitrobenzene; D001554:Benzene; C031294:chlorobenzene; C023650:aniline