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KMID : 0895420010110030249
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Journal of Korean Society of Occupational and Enviromental Hygiene
2001 Volume.11 No. 3 p.249 ~ p.253
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The Determination of Methyl Isocyanate in the Workplace by Gas Chromatography with Flame Ionization Detector
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Abstract
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The purpose of this study is the development of the simple and precise sampling and analysis method of methyl isocyanate(MIC) in the work place as their secondary aliphatic amine derivatives by gas chromatography with flame ionization detector.
The urea derivatives are quantitatively and simultaneously derived from MIC with secondary aliphatic amines such as dipropylamine(DPA), dibutylamine(DBA), and dipentylamine(DDA) in methylene chloride.
The method is based on sampling glass tube in XAD-2 resin which is coated with secondary aliphatic amines. The samples are desorbed by 2 ㎖ methylene chloride and analysed using gas chromatography with flame ionization detector(GC/FID).
In the result, the detection limit of the overall procedure and reliable quantity are 0.020-0.027 ㎍(1.347-1.740)㎍/㎥(0.529-0.684 ppb) based on a 15 L air volume) MIC per sample. The average desorption efficiencies are 97.96 - 101.23％. The results of versus storage time are high and stable recovery rates.
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