作 者：
薛瑞敏;王蓉慧;朱雪梅;张增强;刘锋;何洁;于泓锦
单 位：
中国环境科学研究院固体废物污染控制技术研究所;西北农林科技大学资源环境学院
关键词：
王水水浴消解;原子荧光分光光度计;土壤;总汞
摘 要：
建立污染土壤中总汞分析的前处理和分析测试方法。以标准土样(GBW07405-GSS5)为供试土壤,从样品量、消解液体积、消解时间、不同分析仪器效果方面优化分析测试条件。结果表明,土壤样品前处理条件为,0.5g土壤样品中加入1∶1王水8mL,冷消解18h后,沸水浴消解1h;分析测试条件为,原子分光光度计(AFS-3000)的光电倍增光负高压280V,灯电流25mA。本法总汞的检出限为0.005μg/L,相对标准偏差为2.7%,回收率为94.4%～107%。用某化工厂含汞盐泥堆存场地附近、某电石法聚氯乙烯生产车间周边、某曾经进行过汞法烧碱的车间周边污染土壤进行方法验证,相对标准偏差为0.24%～0.98%,结果没有显著性差异。方法重现性好,分析结果准确、可靠。
译 名：
Analytical Method of Total Mercury in Contaminated Soils Using Atomic Fluorescence Spectrophotometer
作 者：
XUE Ruimin1,2,WANG Ronghui2,3,ZHU Xuemei2,ZHANG Zengqiang1, LIU Feng2,HE Jie2 and YU Hongjin2 (1.College of Resources and Environment,Northwest A&F University,Yangling Shaanxi 712100,China; 2.Institute of Solid Waste Management,Chinese Research Academy of Environmental Sciences,Beijing 100012,China; 3.Civil & Environment Engineering School,University of Science and Technology Beijing,Beijing 100083,China)
关键词：
Aqua regia digestion in water bath;Atomic fluorescence spectrometry;Soil;Total mercury
摘 要：
The preparation treatment and the measurement method were developed to determine the total mercury in contaminated soils.The standard soil(GBW07405-GSS5) was used,and different parameters were tried and selected including the quantity of the soil,digestion solution volume,digestion time,and analytical instruments.The selected preparation parameters were as follows: 8 mL of 1∶1 aqua regia solution,0.5 g soil samples,18 h digestion in room temperature,and then digestion 60 min in the boiled water bath.The atomic spectrophotometer(AFS-3000) was used to determine the mercury in the digestion solutions.The detection limit of total mercury was 0.005 μg/L,relative standard deviation was 2.7%,the recovery ranged from 94.4 % to 107%.The total mercury of Hg-contaminated soils from different contaminated sites were analyzed using this measurement method,the relative standard deviation ranged from 0.24% to 0.98%,and the statistical results showed that there was no significance among triplicate samples,indicating the method could provide reliable and accurate data.
