2023年1月云南化工Jan．2023第50卷第1期YunnanChemicalTechnologyVol.50，No.1doi:10.3969/j.issn.1004-275X.2023.01.11超声萃取－气相色谱法测定土壤中可萃取性石油烃的关键环节研究*黄承韫，李强，肖美玲，周雅琪，蒋文杰(成都综合岩矿测试中心/稀有稀土战略资源评价与利用四川省重点实验室/王雪莲创新工作室，四川成都610081)摘要:针对土壤中可萃取性石油烃(C10～C40)的检测方法，研究了样品提取和净化等样品处理中的关键环节。以正己烷/丙酮(5+3)为萃取剂，通过超声萃取方式提取石油烃类;在净化步骤中，用溶剂置换的方式代替水洗萃取去除丙酮，并采用铜粒进行脱硫处理。结果表明，方法的检出限为1.5mg/kg，精密度2.9%～9.6%，加标回收率86.4%～106%。该方法降低了丙酮的使用量，简化了分析流程，提升了检测效率，可以实现针对大批量土壤样品的快速检测;通过使用可回收的铜粒等方式，节约了分析成本;方法操作流程简单，易于推广，可快速的为场地调查工作中石油烃污染状况提供准确结果。关键词:可萃取性石油烃;探针式超声萃取;气相色谱法中图分类号:X831文献标识码:A文章编号:1004－275X(2023)01－0040－04ＲesearchontheKeytotheDeterminationofExtractablePetroleumHydrocarbons(C10～C40)inSoilbyUltrasonicExtraction－GC－FIDAnalysis*HuangChengyun，LiQiang，PeiLiangfang，PiLu(ChengduAnalytical＆TestingCenterforMinerals＆Ｒocks/EvaluationandUtilizationofStrategicＲareMetalsandＲearEarthＲesourceKeyLaboratoryofSichuan，Chengdu610081，China)Abstract:Analyticalmethodfordeterminationoftheextractablepetroleumhydrocarbons(C10～C40)inthesoilwasoptimizedinthispaper．Pretreatmentstepsincludingextractionandpurificationwerethoroughlyexplored．Theresultssuggestthathexane/acetone(5+3)canbeusedtoeffectivelyextractthetargethydrocarbonsinthesoilsamplesbyultrasonicprocesserwithprobe．Acetonecanthenbesuccessfullyremovedbyrotaryevaporatorduringsolventevaporationinsteadofbeingextractedbywaterwhichsimplifiedthepurificationstep．Cupperpowderwhichwastraditionallyaddedtoremovesulfideinthesoilsamplecanbereplacedbycupperparticleforconvenienthandlingandrecyclepurpose．Thede-terminationlimitofthismethodis1．5mg/kg．Theprecisionis2．8%～9．5%andtherecoveryofthesoilsampleswithadded...
