工作场所空气中丙烯腈测定的便携式气相色谱法  

Portable gas chromatography for determining airborne acrylonitrile in workplaces

作　　者：刘坚[1] 张锋[2] 朱宝立[2] 

机构地区：[1]江苏省昆山市卫生监督所,215301 [2]江苏省疾病预防控制中心,210009

出　　处：《中华劳动卫生职业病杂志》2013年第10期777-778,共2页Chinese Journal of Industrial Hygiene and Occupational Diseases

基　　金：江苏省医学创新项目与领军人才培养（LJ201130）

摘　　要：目的 建立便携式气相色谱仪快速测定空气中丙烯腈的方法.方法 在实验室配制丙烯腈单标样品,经便携式气相色谱仪的内置恒流泵采样,预浓缩器浓缩,热解吸进样,毛细管柱分离,微氩离子检测器检测等过程,确定保留时间,根据保留时间进行定性分析.在设定的气相色谱条件下,采用外标法,制定标准曲线,对丙烯腈进行定量分析.结果 便携式气相色谱测定丙烯腈的线性范围为0.25～3.00 mg/m^3,回归方程为：y=10^-5x-0.0275,相关系数为0.9977,最低检测限为5μg/m^3,定量下限为0.25 mg/m^3,精密度为7.09％,准确度为91.09％～ 105.54％.结论 便携式气相色谱仪检测丙烯腈,操作简便,重现性好,准确度高,适合用于空气中丙烯腈的快速检测.Objective To establish a method for rapid determination of airborne acrylonitrile using a portable gas chromatograph.Methods A single standard sample of acrylonitrile was prepared in a laboratory and sampled by the built-in constant flow pump of the portable gas chromatograph.The sample was then preconcentrated by the preconcentrator,thermally desorbed,separated by capillary columns,and detected by a micro argon ionization detector to determine the retention time.Retention time was then used to perform qualitative analysis.Under the set condition of gas chromatography,the external standard method was used to create a standard curve for quantitative analysis of acrylonitrile.Results The linear range of acrylonitrile on the portable gas chromatograph was 0.25 to 3.00 mg/m^3.The regression equation was y=10^-5x-0.0275,r=0.9977.The limit of detection was 0.005 mg/m^3,and the lower limit of quantification was 0.25 mg/m^3.The relative standard deviation was lower than 7.09%,and the degree of accuracy was 91.09-105.54%.Conclusion Portable gas chromatography is a simple,repeatable,and accurate method for rapid determination of airborne acrylonitrile.

关 键 词：色谱仪 气相 丙烯腈 

分 类 号：R134.4[医药卫生—劳动卫生] O657.71[医药卫生—公共卫生与预防医学]