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对TH_PKU-300B挥发性有机物快速在线监测系统的改进
引用本文:母应锋,傅寅,陆晓波,喻义勇,张予燕,朱志锋.对TH_PKU-300B挥发性有机物快速在线监测系统的改进[J].环境监控与预警,2016,8(1):19-23.
作者姓名:母应锋  傅寅  陆晓波  喻义勇  张予燕  朱志锋
作者单位:江苏省空气预警监测重点实验室,南京市环境监测中心站,江苏 南京 210013
基金项目:江苏省环境监测科研基金资助项目(1206)
摘    要:针对现有 TH_PKU -300B 挥发性有机机物快速在线监测系统在测定含氧挥发性有机化合物(OVOCs)、含氮挥发性有机物(NVOCs)和高沸点挥发性有机物时存在灵敏度低、精密度差、线性响应较差、记忆效应明显等不足,根据其原理,对其 GC -MS 通道的部分气路进行改进。通过实验对比分析,证明改进后的仪器系统响应更加灵敏、线性拟合度更高、精密度及解析效率均显著提高,同时检出限也由改进前的体积分数0.1×10-9~1.0×10-9降低至0.02×10-9~0.08×10-9,并解决了记忆效应问题。改进后的系统在 OVOCs、NVOCs 和高沸点挥发性有机物测定方面要优于原系统。

关 键 词:TH_PKU  -300B  系统  挥发性有机化合物  在线监测
收稿时间:5/7/2015 12:00:00 AM
修稿时间:2015/9/30 0:00:00

Improvement on the TH_PKU-300B Fast On-line Monitoring System for Volatile Organic Compounds
MU Ying feng,FU Yin,LU Xiao bo,YU Yi yong,ZHANG Yu yan,ZHU Zhi feng.Improvement on the TH_PKU-300B Fast On-line Monitoring System for Volatile Organic Compounds[J].Environmental Monitoring and Forewarning,2016,8(1):19-23.
Authors:MU Ying feng  FU Yin  LU Xiao bo  YU Yi yong  ZHANG Yu yan  ZHU Zhi feng
Abstract:For the existing TH_PKU -300B fast on -line monitoring system for volatile organic compounds ,some deficiencies were present such as low sensitivity,poor precision,poor linear response and serious memory effect in the determination of oxygenated vol -atile organic compounds (OVOCs),nitrogenous volatile organic compounds (NVOCs) and high boiling point volatile organic com -pounds.According to its working principles,part of the gas path in the GC -MS system was improved.The experimental results showed that the modified instrument was advantageous in sensitivity ,linear fitting degree,precision and thermal desorption efficiency . The detection limit was lowered from 0.1 ×10-9 ~1.0 ×10 -9 to 0.02 ×10-9 ~0.08 ×10 -9 ,and the problem of memory effect was solved.The modified instrument is superior to the original instrument in the determination of OVOCs ,NVOCs and high boiling point volatile organic compounds.
Keywords:TH_PKU -300B  Volatile organic compounds (VOCs)  On-line monitoring
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