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KMID : 0365220110480010042
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Korean Journal of Public Health
2011 Volume.48 No. 1 p.42 ~ p.46
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Desorption efficiency and comparison of passive sampler and active sampler for the measurement of ethylene glycol monomethyl ether and ethylene glycol monomethyl ether acetate
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Park Ji-Young
Byun Hyae-Jeong
Hwang Gwi-Seo
Kim Yang-Ho
Park Dong-Uk
Ha Kwon-Chul
Chung Eun-Kyo
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Abstract
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Objectives: The objectives of this study were to determine the desorption efficiency of carbon disulfide (CS₂) and a mixture of methylene chloride/methanol, compare measurements by charcoal tubes and diffusive samplers of EGME and EGMEA.
Methods: To compare desorption efficiency, Three different concentrations (low, medium, and high) of EGME and EGMEA were injected into the charcoal tubes and diffusive samplers and desorbed using carbon disulfide (CS₂) and a mixture (95:5) of methylene chloride and methanol .
The active and passive samplers of the airborne samples were placed alongside in order to observe any differences between them. All samples were analyzed with gas chromatography/flame ionization detector. Comparisons between samplers were analyzed using a paired t-test.
Results: The desorption efficiencies were 39% and 96% for CS₂ and the mixture of methylene chloride/methanol, respectively. The airborne concentrations by the passive samplings were lower than those of the active samplings (p < 0.05), but had a moderate correlation.
Conclusion: Desorption must be carried out using a mixture of methylene chloride/methanol in EGME and EGMEA samples. Passive sampling should be applied in EGME- and EGMEA-exposed workplaces very carefully because of its possibility of low estimation.
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KEYWORD
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Charcoal tube, Desorption efficiency, Ethylene Glycol Monomethyl Ether (EGME), Ethylene Glycol Monomethyl Ether Acetate (EGMEA), Passive sampler, Organic solvent
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