| 用于低浓度卤代烃及多卤代烃标准气体研制的分析测试方法优化及应用 |
| Optimization and Application of Measurement for the Development of Low-Concentration Halogenated Hydrocarbons and Polyhalogenated Hydrocarbons Standard Gas |
| 投稿时间：2024-06-26 修订日期：2024-09-26 |
| DOI：10.19316/j.issn.1002-6002.2026.01.09 |
| 中文关键词: 卤代烃 标准气体 内标法 |
| 英文关键词:halogenated hydrocarbons standard gas internal standard method |
| 基金项目:国家重点研发计划项目(2022YFF0606401) |
| 作者 | 单位 | E-mail | | 黄伟 | 生态环境部环境发展中心环境标准样品研究所, 北京 100029
国家环境保护污染物计量和标准样品研究重点实验室, 北京 100029 | | | 杨静 | 生态环境部环境发展中心环境标准样品研究所, 北京 100029
国家环境保护污染物计量和标准样品研究重点实验室, 北京 100029 | | | 杜健 | 生态环境部环境发展中心环境标准样品研究所, 北京 100029
国家环境保护污染物计量和标准样品研究重点实验室, 北京 100029 | | | 王帅斌 | 生态环境部环境发展中心环境标准样品研究所, 北京 100029
国家环境保护污染物计量和标准样品研究重点实验室, 北京 100029 | | | 樊强 | 生态环境部环境发展中心环境标准样品研究所, 北京 100029
国家环境保护污染物计量和标准样品研究重点实验室, 北京 100029 | | | 高冰 | 生态环境部环境发展中心环境标准样品研究所, 北京 100029
国家环境保护污染物计量和标准样品研究重点实验室, 北京 100029 | gbing315@163.com | | 封跃鹏 | 生态环境部环境发展中心环境标准样品研究所, 北京 100029
国家环境保护污染物计量和标准样品研究重点实验室, 北京 100029 | |
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| 中文摘要: |
| 卤代烃作为环境空气质量改善、气候变化应对、臭氧层保护等领域的共同研究对象,是大气光化学监测、含卤温室气体监测等监测体系中的重要指标项目。开展卤代烃标准气体配套研究,可为碳污协同监测提供必要的技术支撑。然而,在低浓度卤代烃及部分多卤代烃标准气体的研制过程中,传统的外标法进样+气相色谱-氢火焰离子化检测器(GC-FID)检测的分析测试方法难以满足标准气体精确定量的要求,而气相色谱-质谱(GC-MS)因信号波动相对较大,在采用外标法进样时难以获得稳定的测量结果。此外,标准气体因需要逐瓶定值,且存在在线混合时不易在短时间内混匀等问题,在内标定值方面存在一定的制约。针对这一问题,通过改进GC-MS进样装置,建立了采用内标法进样且无需混匀步骤的标准气体分析测试方法。经两类气体标准样品检验,该方法有效避免了仪器信号波动、压力变化带来的干扰,分析测试结果的稳定性得到明显改善。利用该方法对全氟化碳混合标准气体的关键参数进行了考察,得到了满意的实验结果,表明改进后的分析测试方法可为低浓度卤代烃及多卤代烃标准气体研制提供技术借鉴和参考。 |
| 英文摘要: |
| As common study subjects in areas including ambient air quality improvement,climate change response,and ozone layer protection etc.,halogenated hydrocarbons are considered to be one of the key indicators in monitoring systems such as atmospheric photochemical monitoring and halogenated greenhouse gases detection.Research on corresponding standard gases can provide essential technical support for the synergistic monitoring of greenhouse gases and air pollutants.However,during the development of standard gases for low-concentration halogenated hydrocarbons or certain polyhalogenated hydrocarbons,traditional measurement with external standard method using GC-FID is hard to meet the requirements for precise quantification.GC-MS due to its relatively high signal fluctuation,also fails to obtain stable measurement results when using external standard method.Moreover,since standard gases require individual bottle certification and face challenges such as inhomogeneity during online mixing over short periods,their application in internal standard-based quantification is also constrained.To address these issues,an optimized GC-MS sampling device was developed,establishing an internal standard-based analytical method that eliminates the need for a mixing step.Validation with two types of gas standard reference materials demonstrated that this method can effectively avoids interference from instrument signal fluctuations and pressure variations,significantly improving the stability of analytical results.Using this method,key parameters of perfluorocarbon mixed standard gases were investigated,yielding satisfactory experimental results.This indicates that the optimized analytical approach can serve as a valuable reference for the development of standard gases for low-concentration halogenated hydrocarbons and polyhalogenated hydrocarbons. |
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