便携式气相色谱法测定工作场所中苯、甲苯及其他挥发性有机溶剂

发布时间：2018-01-06 21:35

本文关键词：便携式气相色谱法测定工作场所中苯、甲苯及其他挥发性有机溶剂　出处：《卫生研究》2016年02期 　论文类型：期刊论文

【摘要】：目的建立工作场所中空气中环氧乙烷、呋喃、二氯甲烷、苯、甲苯的便携式气相色谱现场快速检测方法。方法利用动态气体稀释仪配制标准气体,标准气体和空气样品内置恒流采样泵抽取,经色谱柱分离后用Voyager便携式气相色谱仪(光离子化检测器)检测,以保留时间定性,峰面积定量。结果便携式气相色谱仪在柱温60℃,柱前压9psi条件下,5种物质分离效果良好,环氧乙烷在0.45~90.72mg/m~3、呋喃在0.22~44.50 mg/m~3、二氯甲烷在2.19~437.4 mg/m~3、苯在0.32~13.29 mg/m~3、甲苯在0.38~15.68 mg/m~3范围内具良好线性关系,均R~2≥0.999,检出限分别为0.03、0.04、0.2、0.008和0.03 mg/m~3,相对标准偏差分别为0.79%~2.4%、1.5%~1.9%、0.97%~1.8%、2.3%~3.2%和3.4%~4.6%,回收率分别为101.4%~108.4%、85.49%~94.98%、97.78%~106.2%、99.29%~103.5%和95.54%~101.7%。空气样品同时采用7890A台式气相色谱仪进行对比测定,结果环氧乙烷、呋喃、二氯甲烷、苯、甲苯的相对误差分别为0.091%~8.8%、3.8%~6.7%、0.77%~9.4%、0.24%~1.6%和0.31%~8.0%。结论该方法操作简便、准确、灵敏,分离效果好,分析周期短,可用于职业危害现场的快速检测。
[Abstract]:Objective to establish the workplace in the air of epoxy ethane, furan, dichloromethane, benzene, toluene and the rapid detection method of portable gas chromatography. By means of dynamic gas dilution instrument preparation of standard gas, standard gas and air samples with built-in constant current sampling pump, using Voyager portable gas chromatograph by chromatographic column separation (photoionization detector) detection by retention time qualitative, quantitative peak area. The portable gas chromatograph in column temperature of 60 DEG C, column pressure under the condition of 9psi, 5 kinds of material with good separation effect, ethylene oxide in 0.45~90.72mg /m~3, 0.22~44.50 mg/m~3 furan in dichloromethane at 2.19~437.4, mg/m~3, mg/m~3, 0.32~13.29 in benzene, toluene has a good linear relationship in the 0.38~15.68 mg/m~3 range, R~2 = 0.999, the detection limits were 0.03,0.04,0.2,0.008 and 0.03 mg/m~3, the relative standard deviation is 0.79%~2.4%, 1.5%~1.9%, 0.97%~ 1.8%, 2.3%~3.2% and 3.4%~4.6%, the recovery rate of 101.4%~108.4%, 85.49%~94.98%, 97.78%~106.2%, 99.29%~103.5% and 95.54%~101.7%. air samples at the same time using the 7890A desktop gas chromatograph was compared by results, ethylene oxide, furan, dichloromethane, benzene, toluene and the relative error is 0.091%~8.8% and 3.8%~6.7% respectively, 0.77%~9.4%, 0.24%~1.6% and 0.31%~8.0%. conclusion the method is simple and accurate, sensitive, good separation effect, short analysis period, can be used for rapid detection of occupation hazard site.

【作者单位】：浙江省医学科学院;北京博赛德科技有限公司;
【基金】：浙江省科技厅分析测试科技计划项目(No.2013C37094);浙江省科技厅科技条件建设项目(No.2013F10051);浙江省科技厅培育创新载体项目(No.2015F10033)
【分类号】：R134.4
【正文快照】： 便携式气相色谱仪具有测定速度快、重量轻、灵敏度高(ppb级)、连续测量、适用范围宽、无需任何化学试剂和载气就可以直接检测的特点,可检测离子化电位≤12e V的任何化合物。由于我国快速检测技术国家标准的缺乏和便携式气相色谱仪器系统性研究的不足,导致运用便携式气相色谱仪

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