【引用本文】 乔宁强, 薛志伟, 王刚峰, 等. 索氏提取-原子荧光光谱法测定含油岩心中的汞和砷[J]. 岩矿测试, 2019, 38(4): 475-481. doi: 10.15898/j.cnki.11-2131/td.201812030128
QIAO Ning-qiang , XUE Zhi-wei , WANG Gang-feng , et al. Determination of Mercury and Arsenic in Oil-bearing Core by Soxhelt Extraction-Atomic Fluorescence Spectrometry[J]. Rock and Mineral Analysis, 2019, 38(4): 475-481. doi: 10.15898/j.cnki.11-2131/td.201812030128

索氏提取-原子荧光光谱法测定含油岩心中的汞和砷

核工业二〇三研究所, 陕西 咸阳 712000

收稿日期: 2018-12-03  修回日期: 2019-03-08 

基金项目: 陕西省科技创新基地“岩石矿物、土壤和水体公共检测平台”项目(2017KTPT-29)

作者简介: 乔宁强,工程师,主要从事化学分析相关的测试和研究工作。E-mail:928937501@qq.com。。

Determination of Mercury and Arsenic in Oil-bearing Core by Soxhelt Extraction-Atomic Fluorescence Spectrometry

No. 203 Research Institute, China National Nuclear Corporation, Xianyang 712000, China

Received Date: 2018-12-03
Revised Date: 2019-03-08

摘要:原油对测定含油岩心中的汞和砷有很大影响,目前去除原油等有机物的方法主要有高温烧制、强酸高温氧化等,要求反应温度较高,会造成汞和砷的损失而使测定结果偏低。本文采用索氏提取法,以氯仿作为提取剂在75℃下低温提取分离岩心中的原油,再用50%的王水溶解剩余样品,原子荧光光谱法测定汞和砷的含量。该方法对汞和砷的检出限分别为0.003mg/kg和0.10mg/kg,相对标准偏差分别为7.3%和5.1%,加标回收率均大于92.5%。与传统方法相比较,该方法避免了由于原油的疏水性造成样品与王水接触不充分、样品分解不完全和反应温度过高导致汞元素损失的问题,汞的相对标准偏差由33.0%提高至7.3%,砷的相对标准偏差由25.0%提高至5.1%,为含油岩心中其他元素的检测提供了借鉴。

关键词: 含油岩心, , , 索氏提取, 王水, 原子荧光光谱法

Determination of Mercury and Arsenic in Oil-bearing Core by Soxhelt Extraction-Atomic Fluorescence Spectrometry

KEY WORDS: oil-bearing core, Hg, As, Soxhelt extraction, aqua regia, Atomic Fluorescence Spectrometry

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索氏提取-原子荧光光谱法测定含油岩心中的汞和砷

乔宁强, 薛志伟, 王刚峰, 罗丹