气相色谱-质谱法对环境水体中三卤甲烷的测定方法研究
Study on the Determination Method of Trihalomethane in Environmental Water by Gas Chromatography-mass Spectrometry
柴珊1
作者信息
- 1. 临汾市环境应急与环境投诉受理中心, 山西 临汾 041000
- 折叠
摘要
为了解决水体中三卤甲烷测定效率低、精度差的不足,提出了一种新的气相色谱-质谱法联合测定技术.在采集到待测样品后,将其转移到空瓶内,然后经过吹扫捕集除理后,把水体中的三卤甲烷脱出并使用捕集器将待测吸附,最后经过热解以后进入气相色谱柱分离、质谱检测器测定、外标法定量获取测定结果.根据实际应用表明,新测定方法的检出限为 0.001～0.03 μg/L,测定的相对标准偏差在 0.95%～2.2%之间,具有较高的测试精度,能够满足5 种三卤甲烷的同时测定.
Abstract
In order to address the shortcomings of low efficiency and poor accuracy in the determination of trihalomethanes in water,a new gas chromatography-mass spectrometry combined determination technology is proposed.After collecting the sample to be tested,it is transferred to an empty bottle.After being purged,captured,and cleaned,the trihalomethane in the water is removed and adsorbed using a collector.Finally,after pyrolysis,it enters the gas chromatography column for separation,mass spectrometry detector for measurement,and external standard method for quantification to obtain the measurement results.According to practical applications,the detection limit of the new measurement method is 0.001 to 0.03 μg/L,with a relative standard deviation of 0.95%to 2.2%,has high testing accuracy and can meet the simultaneous determination of 5 types of trihalomethanes.
关键词
气相色谱-质谱法/三卤甲烷/吹扫捕集/测定精度Key words
gas chromatography-mass spectrometry/trihalomethane/blowing and trapping/measurement accuracy引用本文复制引用
出版年
2024
NETL
NSTL
万方数据