工作场所空气中正戊醇测定的溶剂解吸气相色谱法.pdfVIP

304 中华劳动卫生职业病杂志2015 年4 月第33 卷第4 期 Chin J Ind Hyg Occup Ois, Apr 2015 ,VoI.33 ,No.4 ·监测与检验技术· 工作场所空气中正戊醇测定的溶剂解吸气相色谱法 李添姊刘奋林怡然谢玉敢闰慧芳 [摘要} 目的 建立工作场所空气中正戊醇的溶剂解吸气相色谱测定方法。 方法 采用活性炭 管采集工作场所空气中正戊醇，2%异丙醇二硫化碳溶液解吸，经硝基对苯二甲酸改性的聚乙二醇 (FFAP)毛细管色谱柱分离，火焰离子化检测器测定。 结果 该方法正戊醇检出限为0.2 mg/L，定量下 限为 0.6 mgfL. 测定程围为0.6-4072.0 mg/L;最低检出质量浓度为 0.2mg阳3 (以采集1.5 L 空气样品 计);该方法重现性好，相对标准偏差为 2.3%-5.4%.平均解吸效率为 86.9%-94.2%，采样效率为 1 ∞%. 1∞mg 活性炭的穿透容量大子8.0mg，样品在室温下至少可保存 14 d。 结论该方法适用于工作场所 空气中正戊醇的测定。 [关键词] 正戊醇;工作场所;色谱法，气相 Deten时nation of n-pentanol in workplace 创r by solvent des。叩.tion gas chromatograpby Li Ti.an.di. Liu Fen ,Lin Yiran , Xie Yuxu棚， Yan Hu协略 Shenzhen 丹evenlÎQn and Treatment Centerfor OCCI毛patωnal Diseωes .Shenzhen 518，ωJ , Chin.a Corresponding aut阳r: Yan Hu协ng(E-mail :yan-hu扩àng@yeah.net} [Abstract] Objective To develop a solvent desorption gas chromatographic method for determination of n-pentanol in the workplace air. M etbods n-Pentanol in the workplace air was collected with activated carbon tubes , desorbed with 2% 2-propanol in carbon disulfide. separated with a nitroterephthalic acid-modified FFAP capillary column, and detected with f1 ame ionization detector. Results 币le limit of detection was 0.2 mg/L; the lower limit of quantification was 0.6 mg/L; the linear range was 0.6-4072.0 mg/L. The minimum detectable mass concentration was 0.2 mgfm3 for 1.5 L of air sample. 币l1S me由od was highly repeatable. The relative standard deviations were 2.3%-5.4%. 币le average desorption efficiencies we陀 86.9%-94.2%.ηle absorption efficiencies were 1∞%. The b町akthrough volume was above 8.0 mg in 1 ∞-mg activated carbon. The samples in activated carbon tubes could be stored for at least 14 days at r.ωm temperature. Conclusion The method is feasible for determination of n-pentanol in