应急监测中便携式顶空GC-MS法测定水中VOCs的初步研究.pdfVIP

第 23 卷第12 期 环境科学研究 Vol. 23 ,No. \2 2010 年 12 月 Reseatch of Environmental Scíences Dec. ,2010 应急监测中便携式顶空IGC-MS 法测定水中 VOCs 的初步研究 孙晓慧1 ，吕怡兵2 ，谭 丽2 ，冯元群1 ，刘劲松1 ，潘荷芳1 1.浙江省环搅监测中心，浙江杭州 310012 2. 中国环境监测总站，北京 1ω012 摘襄:通过对实验室加标水样和实际水样的测定，研究了便携式躏窍/气相色谱m 质谱法(GC 呻 MS) 与吹扫捕集IGC 础 MS法测 定水中 VOCs 的性能比较，探讨了利用Loop 环测定水中商浓度 VOCs 的准确度.结果表明:便携式顶~/GC - MS测定水中 54 种低浓度 VOCs 的检出限各高于吹扣捕集IGC MS系统，准确度和精精度分别为 67.4% -1369品和 9.08% 呻 19.80% ，均满足 环榄应急监测分析的要求:利用Loop 环，便携式顶空IGC 峭 MS 可对水中高浓股级(mg/L) VOCs 进行较为准确地测定，回收率 为 1ω% -149%;复杂的实际样品篡本不干扰便携式顶窍IGC 呻 MS的测定，与吹扫捕集IGC 阳 MS法相比，二者对实际水样的测 定结果相对偏盖小于209岛;便携式顶空IGC - MS 在水污染事故现场可得到基本准确的编果，可为事故后续处理提供有效的数 据支持. 关键诩:便携式顶空IGC 明 MS; 挥发性有机物;准确度;应急监测; Loop 环 中阳分类号: X830.2 文撇标志码:A 文章编号: 1001-6929(2010)12 -1511-的 在valuation of Accuracy of VOC Analysìs in Water Samples by Portable Headspace/GC-MS in Emergency Monitoring 2 SUN Xiao.hui • LÛ Yi.bing • TAN Li2 , FENG Yuan.qun , LIU Jing-song , PAN He翩fang 1. Zhejiang Environmental Monitoring Center , Hangzhou 310012 , China 2. China National Environmental Monitoring Center , Beijing 100012 , Chína Abstract: In this study ，由e operating performances of Portahle Headspace/GC-MS and Purge and Trap/GC-MS to evaluate lahoratory. spiked w创er samples and actual water samples were compared. The accuracy of the Loop Ringωmeasure high concentrations o( VOCs in water was also discussed. Results indícated that for the examined 54 kinds of VOCs at low concentration串， the detection limit wω ølighdy higher for Portable Headspace/GC-MS as compared with the Purge and Trap/GC-MS system. The accuracy of the Portable Headspace/GC-MS was in the range of 67. 4% -136% , with pr朋ision in the range of 9. 08% -19. 809岛; both met the requirements for e