工作场所空气中苯乙烯时间加权平均浓度测定方法探讨  

STUDY ON THE DETERMINATION OF THE TIME WEIGHTED AVERAGE CONCENTRATION FOR STYRENE IN WORKPLACE AIR

作　　者：王先义[1] 

机构地区：[1]郧阳医学院医疗保健中心,十堰442000

出　　处：《现代预防医学》2008年第20期3927-3928,共2页Modern Preventive Medicine

摘　　要：[目的]建立工作场所空气中苯乙烯的时间加权平均浓度(TWA)气相色谱测定方法。[方法]通过活性炭管采样,溶剂解吸气相色谱法测定空气中苯乙烯。按照《工作场所空气中毒物检测方法的研究规范》的要求进行实验研究,并对其测定条件和气相色谱条件进行优化选择。[结果]方法线性范围为2.6～1000μg/ml。相关系数r=0.9997。检出限2.6μg/ml,相对标准偏差在3.1%～5.6%之间。每100mg活性炭对苯乙烯的穿透容量为28.6mg。样品在活性炭管中稳定至少可保存7d,方法重现性好。[结论]此方法的各项指标均达到了工作场所空气中毒物检测方法研究规范的要求,适用于工作场所空气中苯乙烯的时间加权平均浓度测定。由此为新颁布的《工作场所有害因素职业接触限值》(PC-TWA)积累苯乙烯相配套的检验方法。[Objective] To establish a gas chromatographic methods with carbon disulfide desorption for styrene in TWA eoncentration in the workplace air. [ Methods] Styrene Solvents was sampled with charcoal tube, and the styrene in the air were determined with solvent desorpfion with carbon disulfide. The method is based on the standardization of methods for determining of toxic substance in workplace air. The determination and chromatographic conditions were optimized. [ Results] Linear limits of the methods was at the range of 2.6 to 1 000μg/ml. The coefficient of curtelation was 0.999 7. Limit of detection of the solvents was 2.6μg/ml. The coefficient of variation in sample determination was ranged from 3.1%to 5.6%. The breakthrough capacity of 100mg charcoal for the solvent was 28.6mg. The samples could be stored stability under normal conditions for at least 7 days. [Conclusion ] This method is corresponding to the Chinese guidelines of the method for determination of toxic substances in workplace air. The method is established and confirmed suitable of determine Styrene in TWA concentration in workplace air, which makes contribution to putting the new limit of occupational exposure into practice..

关 键 词：空气有毒物质 苯乙烯 TWA浓度 活性炭管 溶剂解吸 气相色谱 

分 类 号：R134.4[医药卫生—劳动卫生]