土壤中砷汞样品同步消解测试和消解液保存条件探究  

Simultaneous digestion test of arsenic and mercury samples in soil and exploration of storage conditions of digestion solution

作　　者：陈诚 金德周 章军 赵亮 李冬林 禹凤琳 CHEN Cheng;JIN Dezhou;ZHANG Jun;ZHAO Liang;LI Dongling;YU Fenglin(Changyang County Environmental Monitoring Station,Yichang Hubei 443000;Yichang Ecological Environment Monitoring Center,Yichang Hubei 443000;Wujiagang District CDC,Yichang Hubei 443000)

机构地区：[1]长阳县环境监测站,湖北宜昌443000 [2]宜昌市生态环境环境监测中心,湖北宜昌443000 [3]宜昌市伍家岗区疾控中心,湖北宜昌443000

出　　处：《天津化工》2024年第2期79-83,共5页Tianjin Chemical Industry

摘　　要：为提升大批量土壤样品砷汞分析测试时的效率,重点考察了砷汞土壤样品同步水浴消解后分别测试的准确度和精密度,同时考察了定容试剂、保存温度、保存时间对砷汞消解液测试结果的影响。经测定,2类不同类型砷汞土壤标准样品测试值均在质控范围内,6次测定的精密度在2.5%~7.4%。砷汞土壤标准样品经水浴消解后定容试剂为10%盐酸溶液,在5℃以下存放5 d时,其测定值仍在土壤标准样品质控范围内。研究表明,砷汞土壤标准样品经同步消解后分开测试满足质控要求,其消解液可在10%盐酸溶液的介质、5℃以下存放5 d,在大批量砷汞土壤样品分析时,有助于分析人员合理安排时间,统筹完成工作任务。In order to improve the efficiency of arsenic and mercury analysis and testing in large quantities of soil samples,the accuracy and precision of the simultaneous water bath digestion of arsenic and mercury soil samples were mainly investigated.At the same time,the effects of constant volume reagents,storage temperature,and storage time on the test results of arsenic and mercury digestion solution were also investigated.After measurement,the test values of two different types of arsenic mercury soil standard samples are all within the quality control range,with a precision of 2.5%~7.4%for six measurements.The arsenic mercury soil standard sample was digested in a water bath and the constant volume reagent was a 10%hydrochloric acid solution.When stored below 5℃for 5 days,the measured value was still within the quality control range of the soil standard sample.This study shows that the arsenic and mercury soil standard samples are tested separately after synchronous digestion to meet the quality control requirements.The digestion solution can be stored in a medium of 10%hydrochloric acid solution for 5 days below 5℃.When analyzing large quantities of arsenic and mercury soil samples,it helps analysts to arrange time reasonably and complete work tasks as a whole.

关 键 词：土壤 砷汞 同步消解 消解液 保存条件 

分 类 号：TQ016.1[化学工程]