应急监测用多组分挥发性有机物气体标准物质研制
Development of multi-component organic gas standard for emergency monitoring
余楠 1李鹏辉 1张鹏辉 1蒋昌怀 1刘季业 1袁娇阳 1杨嘉伟1
作者信息
- 1. 四川中测标物科技有限公司,四川成都 610052
- 折叠
摘要
介绍了瓶装 1 μmol/mol氮中 52组分挥发性有机物气体标准物质的研制过程.所选 52种目标组分满足中国环境标准HJ 1223-2021《环境空气挥发性有机物的应急测定便携式气相色谱-质谱法》中所规定的环境空气中有害挥发性有机物的监测需求,建立质谱选择离子扫描(SIM)的分析方法.通过气瓶筛选实验,选取配备硅烷化阀门的特殊气瓶作为充装容器,使用GC-MS研究目标化合物的均匀性及长期稳定性.结果表明:该气体标准物质分析平衡时间短,大幅提高分析效率,1年内稳定性良好,满足现场应急测定需求.同时,严格按照GB/T 5274.1-2018中给出的不确定度计算公式评定研制标物的不确定度,其相对扩展不确定度为U=5%(k=2).
Abstract
The paper introduces the development process of multi-component VOCs gas in nitrogen at 1 μmol/mol level which was checked using GC-MS coupled with select ion scanning mode.The 52 target components were selected to meet the monitoring requirements of hazardous volatile organic compounds specified in Chinese environmental standard HJ 1223-2021 Ambient air—Emergency determination of volatile organic compounds—Portable gas chromatography-mass spectrometry.The special gas cylinder equipped with a silanization valve was selected as the filling container through a gas cylinder screening experiment.The homogeneity and stability of the target compounds were tested using GC-MS.The results showed that the purge time was short,which improved the analysis efficiency,and better stability could meet the needs of on-site emergency determination.According to the uncertainty calculation formula given in GB/T 5274.1-2018,the relative expanded uncertainty was calculated as U=5%(k=2).
关键词
挥发性有机物/环境空气监测/硅烷化/重量法/不确定度Key words
volatile organic compounds/atmospheric monitoring/silanization/gravimetric method/uncertainty引用本文复制引用
基金项目
四川省重大科学仪器设备专项(2019ZDZX0035)
出版年
2024
NETL
NSTL
万方数据