PXRF法测定土壤中铅的应用研究  

作　　者：刘畅 苑芷茜 

机构地区：[1]辽宁省生态环境监测中心,辽宁沈阳110161

出　　处：《环境保护与循环经济》2023年第5期77-79,共3页environmental protection and circular economy

摘　　要：当前测定土壤中铅的国标方法为石墨炉原子吸收分光光度法(GFAAS法),准确度高但时效性差,如何快速测定是目前支撑土壤应急监测亟须解决的问题。采用GFAAS法与便携式X射线荧光光谱法(PXRF法)测定土壤中的铅,比对2种方法的差异,分析土壤应急监测应用PXRF法测定土壤中铅的可行性。实验结果表明,检出限、精密度和正确度均满足规范要求,且PXRF法测定标准样品和实际样品的精密度均优于GFAAS法,因此在土壤应急监测及初步监测中应用PXRF法测定土壤中的铅可行。At present,the national standard method for the determination of lead in soil is graphite furnace atomic absorption spectrophotometry(GFAAS method),which has high accuracy but poor timeliness.How to measure lead quickly is an urgent problem to support soil emergency monitoring.GFAAS method and portable X-ray fluorescence spectrometry(PXRF method)were used for the determination of lead in soil.The differences between the two methods were compared and the feasibility of using PXRF method for soil emergency monitoring was analyzed.The experimental results showed that the detection limit,precision and accuracy met the requirements of the code,and the precision of the standard and actual samples determined by PXRF method was superior to that of GFAAS method.Therefore,it was feasible to apply PXRF method to the determination of lead in soil in emergency monitoring and preliminary monitoring.

关 键 词：PXRF 土壤 铅 

分 类 号：X502[环境科学与工程—环境工程]