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  • Title: [Determination of Cyclohexene in workplace air by Solvent desorption gas chromatography].
    Author: Liu MM, Zhang J, Zhang MC, Zhao SL, Zeng Q.
    Journal: Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi; 2020 May 20; 38(5):381-384. PubMed ID: 32536080.
    Abstract:
    Objective: To establish a solvent desorption gas chromatography method for determination of cyclohexene in workplace air. Methods: Cyclohexene in the air of workplace was collected with carbon tube and desorbed by carbon disulfide. The target toxicant was separated with the GC column and analyzed with FID detector, identified by retention time, and quantified by peak area. Results: The linear range of cyclohexene in the air of workplace was 0.77~4 050.00 μg/ml, with a correlation coefficient of 0.9999. The limit of detection was 0.23 μg/ml. The lower limit of quantification was 0.77 μg/ml. The minimum detectable concentration was 0.15 mg/m(3) under1.5 L sampling volume and 1.0 ml extraction solution volume. The within-run precision of different cyclohexene concentrations was 0.62%~1.9% and the between-run precisions was 1.5%~3.5%; The average extraction efficiency was 96.4%; Penetration capacity (100 mg of carbon tube) was 29.4 mg; The average collection efficiency was 100%; The samples could be stored for 7 days at room temperature. When placed in 4 ℃ refrigerator, the samples could be stored for 14 days. The potential coexistence of cyclohexane, hexane, benzene, toluene and ethylbenzene with cyclohexene in the air did not interfere with the results of determination. Conclusion: This method has high sensitivity, precision, accuracy and lower limit of detection and it is applicable for determination of cyclohexene in workplace air. 目的： 建立工作场所空气中环己烯的溶剂解吸-气相色谱测定方法。 方法： 工作场所空气中环己烯用活性炭管采集，二硫化碳解吸后，经气相色谱柱分离，氢火焰离子化检测器检测，以保留时间定性，峰面积定量。 结果： 环己烯在0.77~4 050.00 μg/ml范围内呈线性关系，相关系数为0.999 9；方法检出限为0.23 μg/ml，定量下限为0.77 μg/ml，在采样体积为1.5 L，解吸液体积为1.0 ml的条件下，方法的最低检出浓度为0.15 mg/m(3)；批内和批间精密度（RSD）分别为0.62~1.9%、1.5~3.5%；平均解吸效率为96.4%；穿透容量（100 mg活性炭吸附剂）为29.4 mg；平均采样效率为100%；样品在室温下可保存7 d，置于4 ℃冰箱内可保存14 d；空气中可能与环己烯共存的环己烷、正己烷、苯、甲苯和乙苯，在该方法条件下不干扰测定。 结论： 本方法灵敏度高，精密度好，准确度好，检出限低，适用于工作场所空气中环己烯的现场监测。.
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