doi:10.16597/j.cnki.issn.1002-154x.2023.04.008
电感耦合等离子体质谱仪测定气体重金属
杨超杰1∗ 刘文水2 吴曼娜3
(1. 广东轻工职业技术学院,广东 佛山 528200; 2. 广东道予检测科技有限公司,广东 惠州 516000; 3. 东莞市新东欣环保投资有限公司,广东 东莞 523000)
Determination of Gaseous Heavy Metals by Inductively Coupled Plasma Mass Spectrometry
Yang Chaojie 1∗ Liu Wenshui 2 Wu Manna 3
(1. Guangdong Vocational and Technical College of Light Industry, Guangdong Foshan 528200; 2. Guangdong GGS Technology Co. , Ltd. , Guangdong Huizhou 516000; 3. Dongguan Xindongxin Environmental Protection Investment Co. , Ltd. , Guangdong Dongguan 523000)
摘要:
要 本文采用电感耦合等离子体质谱仪测定环境空气和固定污染源中 18 种重金属。 通过微波消解法和电热板 消解法两种前处理展开测试和比较,得出环境空气的电热板消解法检出限在 0.01 ~ 6 ng·m-3 ,微波消解法检出限在 0.01~ 8 ng·m-3 ;固定污染源的电热板消解法检出限在 0.004~ 2 μg·m-3 ,微波消解法检出限在 0.005~ 2 μg·m-3 ;变 异系数均在 6.5%以内,加标回收率均在 72% ~ 125%以内,证实了采用微波消解法或电热板消解法进行前处理测定气体重金属,结果均准确可靠。
关键词：电感耦合等离子体质谱仪 重金属 前处理 加标回收率 变异系数；
Abstract：
A inductively coupled plasma mass spectrometer was developed for the determination of 18 heavy metals in ambient air and stationary sources. The detection limits of electric heating plate digestion and microwave digestion were 0. 01 - 6 ng·m -3 and 0. 01 - 8 ng·m -3 , respectively. The detection limits were 0. 004 - 2 μg·m -3 for the electrothermal plate digestion method and 0. 005-2 μg·m -3 for the microwave digestion method, and the coefficients of variation were all within 6. 5%, and the recoveries were all within 72% - 125%. In this experiment, it was proved that the results of microwave digestion and electric heating plate digestion were both accurate and reliable.
Keywords：inductively coupled plasma mass spectrometer; heavy metals; pretreatment; standard recovery rate; coefficient of variation;