DOI:10.3969/j.issn.1674-6732.2023.01.004便携式XRF在污染地块土壤金属元素调查中的应用杨正标,何青青,王珂,刘宁(江苏省南京环境监测中心,江苏南京210013)摘要:研究了便携式X荧光光谱仪(PXRF)测定土壤中砷、铅、铬、铜、锌和镍的性能,评估其检出限、精密度和准确度,探索了土壤水分和粒径对测定结果的影响程度,并与常规实验室分析方法测定结果进行比对。结果表明,PXRF测定土壤中砷、铅、铬、铜、锌和镍的检出限为5~15mg/kg,标准物质测定结果的相对标准偏差(RSD)≤8.6%,相对误差在±15%以内。随着土壤水分含量的增加,各金属元素测定结果均呈下降趋势,而RSD有上升趋势。土壤粒径对测定结果的影响较小,随着土壤粒径减少,各金属元素测定结果的RSD略有下降趋势。PXRF可以简单、快速地测定多种重金属元素,适用于污染地块重金属元素的现场实时监测。关键词:便携式X荧光光谱仪;土壤;重金属;快速测定;现场实时调查中图分类号:X833文献标志码:B文章编号:1674-6732(2023)01-0023-04收稿日期:2022-04-25;修订日期:2022-06-07基金项目:江苏省环境监测科研基金资助项目(2115)作者简介:杨正标(1979—),男,高级工程师,硕士,从事环境监测和质量管理工作。ApplicationofPortableX-rayFluorescenceSpectrometerintheInvestigationofContaminatedSiteYANGZheng-biao,HEQing-qing,WANGKe,LIUNing(JiangsuNanjingEnvironmentalMonitoringCenter,Nanjing,Jiangsu210013,China)Abstract:TheperformanceofportableX-rayfluorescencespectrometer(PXRF)fordetectingAs,Pb,Cr,Cu,ZnandNiinsoilswasstudied,includingdetectionlimit,precisionandaccuracy.TheinfluenceofsoilmoisturecontentandparticlesizeonthePXRFdeterminationresultswasexplored.ThedetectionresultsbetweenPXRFandconventionallaboratorydetectionmethodswerecomparedforfurtherevaluation.TheresultsshowedthatthedetectionlimitsofAs,Pb,Cr,Cu,ZnandNiwerebetween5and15mg/kg,wheretherelativestandarddeviationsofreferencematerialsdetectionresultswerenotgreaterthan8.6%,andtherelativeerrorswerewithin±15%.Withanincreaseinthesoilmoisturecontent,anoveralldecreaseinthedetectionresultsofeachelementwasobserved,alongwithanincreasingRSD.Thesoilparticlesizehadlittleeffectonthedetectionresults,andwiththede...