大气与环境光学学报 ›› 2017, Vol. 12 ›› Issue (1): 43-49.

• “先进环境监测技术与设备”专辑 • 上一篇    下一篇

基于FID的机动车尾气THC测量模块设计与对比实验

尤坤1, 张玉钧1，刘国华,1,2，陈晨1，高彦伟1，何莹1，张恺1，贺春贵1，鲁一冰1,2，刘文清1   

  1. (1中国科学院环境光学与技术重点实验室，安徽光学精密机械研究所，安徽 合肥 230031;
    2 中国科学技术大学，安徽 合肥 230026）
  • 收稿日期:2016-07-11 修回日期:2016-08-31 出版日期:2017-01-28 发布日期:2017-01-13
  • 通讯作者: 尤坤（1986-），男，安徽桐城人，硕士，工程师, 主要从事环境光学污染气体检测技术方面的研究。 E-mail:kunyou@aiofm.ac.cn
  • 作者简介:尤坤（1986-），男，安徽桐城人，硕士，工程师, 主要从事环境光学污染气体检测技术方面的研究。
  • 基金资助:

    Supported by National Natural High Technology Research and Development Program of China(国家863计划, 2014AA06A503), National Key Scientific Instrument and Equipment Development Projects(国家重大科学仪器设备开发专项, 2012YQ22011902）

Design and Comparative Experiment of Vehicle Exhaust THC Measurement System Based on FID

YOU Kun1, ZHANG Yujun1, LIU Guohua1,2, CHEN Chen1, GAO Yanwei1, HE Ying1, ZHANG Kai1, HE Chungui1, LU Yibing1,2, LIU Wenqing1   

  1. (1 Key Laboratory of Environmental Optics& Technology, Anhui Institute of Optics and Fine Mechanics, the Chinese Academy of Sciences, Hefei 230031, China; 
    2 University of Science and Technology of China, Hefei 230026, China)
  • Received:2016-07-11 Revised:2016-08-31 Published:2017-01-28 Online:2017-01-13

摘要：

机动车排放的总碳氢化合物（total hydrocarbons, THC）是造成雾霾、光化学烟雾的重要原因，在城市大气污染的调查和影响人类健康的研究中，THC是必须的监测目标之一。着重开展了基于氢火焰离子化检测（hydrogen flame ionization detector, FID）的机动车尾气THC测量系统的设计和对比实验。主要介绍了FID测量THC的工作原理，根据FID的测量原理设计了机动车尾气THC测量模块。并根据离子化信号检测需求设计了微电流放大电路，满足大范围、高精度微电流信号检测的要求，获得了检测器对THC的响应峰信号。还对测量得到的THC色谱峰信号进行定性和定量的分析，通过标准曲线法计算了THC的浓度。最后结合美国的SENSORS-FID THC分析仪开展了对比实验，结果表明研发的THC测量模块检测的浓度偏高，测量偏差约为4.44%~8.43%，判断此系统误差主要为O2峰干扰。

关键词: 氢火焰离子化检测, 总碳氢化合物, 微电流放大电路, 标准曲线法

Abstract:

Total hydrocarbons (THC) of vehicle emissions is the major cause of haze and photochemical smog, so THC monitoring must be one of the goals in the investigation of urban air pollution and research of effects on human health. The design of the THC measurement system based on hydrogen flame ionization detector (FID) for vehicle exhaust is developed and comparative experiments are carried out. The working principle of the FID for measuring THC is introduced, and the THC measurement module of vehicle exhaust is designed according to the measuring principle of FID. A micro-current amplifier circuit is designed for detecting the ion signals to meet a wide range, high-precision and micro-current signal testing requirements, and the peak signal of the THC is obtained. Moreover, the THC peak signals are analyzed qualitatively and quantitatively. The concentration of the THC are calculated by standard curve method. The comparative experiments are carried out by using SENSORS-FID THC analyzer of the United States, and the results show that the measurements of the THC measurement module is higher, and the measurement error is about 4.44% ~ 8.43%, this systematic error is primarily caused by oxygen peak interference.

Key words: hydrogen flame ionization detector, total hydrocarbons, micro-current amplifier circuit, standard curve method

中图分类号: 

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