摘要
建立了简便快捷的消除汞记忆效应的冲洗方法,蠕动泵以35 r/min的转速吸取清洗液冲洗管路30 s,清洗液为抗坏血酸(ω=0.05%)、硫脲(ω=0.1%)和盐酸(φ=5%)所组成的混合溶液,该方法能够有效消除电感耦合等离子体质谱仪测汞的记忆效应,适用于地表水、地下水、污水中汞的电感耦合等离子体质谱法的准确测定及仪器管路中汞记忆效应的消除。
A quick and easy flushing method was established to eliminate the memory effect of mercury measurement.The peristaltic pump was used to absorb the cleaning fluid to wash the line for 30 s at 35 r/min.The cleaning fluid was the mixture of ascorbic acid,thiourea and hydrochloric acid.In the mixture,the concentrations of ascorbic acid and thiourea were 0.05%and 0.1%.The volume ratio of hydrochloric acid was 5%.This method can effectively eliminate the memory effect of mercury measurement by ICP-MS.It was suitable for the accurate determination of mercury in surface water,groundwater and wastewater by ICP-MS and the elimination of residual mercury.
作者
战锡林
葛璇
孟鑫
ZHAN Xilin;GE Xuan;MENG Xin(Jinan Environmental Monitoring Center,Jinan 250102,China)
出处
《环境科学与技术》
CAS
CSCD
北大核心
2019年第7期167-171,共5页
Environmental Science & Technology
关键词
ICP–MS
汞
硫脲
抗坏血酸
盐酸
记忆效应
ICP-MS
mercury
thiourea
ascorbic acid
hydrochloric acid
memory effect
