Solvent desorption gas chromatography for determination of allyl chloride in workplace atmosphere / 中华劳动卫生职业病杂志

ABSTRACT

<p><b>OBJECTIVE</b>To establish a method for determination of allyl chloride in the workplace atmosphere by solvent desorption-capillary column gas chromatography.</p><p><b>METHODS</b>Allyl chloride in the atmosphere was adsorbed by activated charcoal tubes and desorbed using dichloromethane, and was then separated by capillary column gas chromatography and determined by flame ionization detector.</p><p><b>RESULTS</b>The concentration of allyl chloride showed a good linear relationship within the range of 0∼200 µg/ml. The linear regression equation was y = 1.27x-0.22 with the correlation coefficient r being 0.999 8. The limit of detection was 0.20 µg /mL. If 7.5 L of air was sampled, the minimum detectable concentration was 0.03 mg/m³. The intra-day and inter-day relative standard deviations (RSD) of repetitive measurement at the high, middle, and low concentration levels were 2.7%∼4.8%. The average sampling efficiency was 100%. The overall desorption efficiency was 94.4%. The breakthrough volume was over 0.59 mg (100 mg activated charcoal).</p><p><b>CONCLUSION</b>The method applies to the determination of allyl chloride in the workplace atmosphere.</p>