坩埚灰化-ICP-AES法测定管输原油中金属元素含量  

DETERMINATION OF METAL ELEMENTS IN PIPELINE TRANSPORTATION CRUDE OIL BY CRUCIBLE ASHING AND ICP-AES

作　　者：索金玲[1] 吴珊[1] 张金龙[1] 徐颖洁[1] 

机构地区：[1]新疆阿拉山口出入境检验检疫局国家级石油化工矿产重点实验室,新疆阿拉山口833418

出　　处：《石油炼制与化工》2013年第4期100-104,共5页Petroleum Processing and Petrochemicals

摘　　要：以坩埚灰化法处理样品,采用电感耦合等离子体原子发射光谱(ICP-AES)仪,建立了管输原油中钡、钙、镉、钴、铬、铜、铁、钾、镁、钠、镍、铅、钒、锰14种金属元素含量的测定方法。对样品处理坩埚进行筛选,对灰化温度和时间进行考察,并对所建方法的检出限、精密度与加标回收率进行测定。结果表明,石英坩埚适合用作管输原油灰化时的熔样坩埚,适宜的灰化时间为3h、灰化温度为550℃;采用ICP-AES法测定管输原油中金属元素含量时,各元素检出限在0.000 6～0.723 0mg/L之间,除镉元素外(相对标准偏差为28.75%),其它金属元素含量测定的相对标准偏差均小于7.0%,加标回收率在91%～115%之间。The determination method for 14 kinds of metal elements in pipeline transportation crude oil was established using crucible and ICP-AES. The test results show that quartz crucible is a good choice for ashing crude oil and the suitable ashing conditions for pipeline transportation crude oil are 550 ℃ ,3 h. And a variety of elements can be detected accurately at the same time with sampling once. The element detection limit of the method is between 0. 000 6-0. 723 0 rag/L, RSD〈7.0% （except cadmium 28.75%）, and the standard recovery rate of 91%-115%.

关 键 词：坩埚灰化 ICP—AES 管输原油 金属元素 

分 类 号：TE81[石油与天然气工程—油气储运工程]