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| 便携式GC-MS仪快速测定水中硝基苯及其在应急监测中的应用 |
| Portable GC MS for Rapid Detection of Nitrobenzene in Water and Its Application in Emergency Monitoring |
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| DOI： |
| 中文关键词: 硝基苯 快速测定 便携式GC-MS 应急监测 水质 |
| 英文关键词: Nitrobenzene Rapid detection Portable GC MS Emergency monitoring Water quality |
| 基金项目:江苏省环境监测科研基金资助项目(1719) |
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| 中文摘要: |
| 采用便携式GC-MS仪快速测定水中硝基苯，通过优化水中离子强度和顶空加热时间，使方法在0 μg/L～300 μg/L范围内线性良好，方法检出限为25 μg/L。标准溶液6次测定结果的RSD为78%～109%，实际水样的加标回收率为807%～103%。同步测定试验表明，硝基苯与7种苯系物分离良好。与国标方法对比，该方法单个样品测定时间由2 h缩短为15 min。将该方法用于应急监测工作中，及时有效的数据可为污水处理及事故调查提供分析和研判依据。 |
| 英文摘要: |
| A new method of portable gas chromatography coupled with mass spectrometry(GC MS)was established to rapidly analyze nitrobenzene in water. Ion intensity in solution and heating time of headspace were optimized. Results showed that the concentration of nitrobenzene in water had good linear relationship with the chromatographic peak area in the range of 0 μg/L～300 μg/L. The method detection limit was 2.5 μg/L. The relative standard deviations of standard solution by 6 duplicate measurements were between 7.8% and 10.9%， the recoveries were between 80.7% and 103%(n=6). Furthermore， it was found out that Nitrobenzene and seven kinds of VOCs could be separated effectively by synchronous determination.Compared with the national standard method， the determination time of this method for single sample was greatly shortened from 2 hours to 15 minutes. When applied in emergency monitoring， this method could provide timely and effective data for the investigation and handling of pollution accidents. |
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