| 摘要: |
| 真空罐/气相色谱-质谱法是我国目前用于环境空气中挥发性有机物（VOCs）监测的主要方法。对该方法的采样前及采样环节的技术细节（包括流量控制器和过滤器的校准检查，采样罐的性能检查，样品的采集、运输及保存），以及实验室分析环节的技术细节（包括色谱柱的选择，内标物的选择，湿度及气体稀释仪对分析结果的影响，标准曲线绘制方式和系统性能优劣的判断）进行讨论和分析。并针对以上技术细节提出解决方案和注意事项，以期为分析人员提供技术参考。 |
| 关键词: 环境空气 挥发性有机物 监测 真空罐/气相色谱-质谱法 |
| DOI： |
| 分类号:X831；O657.7+1 |
| 基金项目:国家标准制修订基金资助项目（2019-4） |
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| Refinement Study on Monitoring Technologies of Volatile Organic Compounds in Ambient Air |
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WANG Hui, LI Yuan, LI Chenet al1,2
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1. Jiangsu Provincial Environmental Monitoring Center，Nanjing, Jiangsu 210019, China;2. State Environmental Protection Key Laboratory of Monitoring and Analysis for Organic Pollutants in Surface Water, Nanjing, Jiangsu 210019, China
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| Abstract: |
| Specially prepared canisters/gas chromatography mass spectrometry is currently the main method for the monitoring of VOCs in ambient air in our country. In this paper, the technical details of the sampling procedure (including the calibration of the flow controller and filter, the performance check on canister, sampling, transportation and preservation of the sample), and the technical details of laboratory (including the selection of column, the selection of internal standard, the influence of humidity and gas diluter on the analysis results, the drawing of standard curve and the judgment of system performance) are discussed and analyzed. Solutions and reminders for the above technical details are provided as references for the analysts. |
| Key words: Ambient Air VOCs Monitoring Specially prepared canisters / gas chromatography-mass spectrometry |
