Determination of Trace Metal Elements in Crude Oils by Microwave Digestion-Inductively Coupled Plasma-Mass Spectrometry Assisted with Organic Solvent

LI Jing-xi; CHEN Fa-rong; YANG Chun-ru; CUI Wei-gang; ZHENG Li; WANG Xiao-ru

2011 Vol. 30, No. 1

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Article navigation > Rock and Mineral Analysis > 2011 > 30(1): 12-16

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LI Jing-xi, CHEN Fa-rong, YANG Chun-ru, CUI Wei-gang, ZHENG Li, WANG Xiao-ru. Determination of Trace Metal Elements in Crude Oils by Microwave Digestion-Inductively Coupled Plasma-Mass Spectrometry Assisted with Organic Solvent[J]. Rock and Mineral Analysis, 2011, 30(1): 12-16.

Citation:

Determination of Trace Metal Elements in Crude Oils by Microwave Digestion-Inductively Coupled Plasma-Mass Spectrometry Assisted with Organic Solvent

1.
Marine Ecology Research Center, First Institute of Oceanography of State Oceanic Administration, Qingdao 266061, China
2.
Marine Ecology Research Center, First Institute of Oceanography of State Oceanic Administration, Qingdao 266061, China
3.
Marine Ecology Research Center, First Institute of Oceanography of State Oceanic Administration, Qingdao 266061, China
4.
Marine Ecology Research Center, First Institute of Oceanography of State Oceanic Administration, Qingdao 266061, China
5.
Marine Ecology Research Center, First Institute of Oceanography of State Oceanic Administration, Qingdao 266061, China
6.
Marine Ecology Research Center, First Institute of Oceanography of State Oceanic Administration, Qingdao 266061, China
7.
Department of Chemistry, The Key Laboratory of Analytical Science of MOE, Xiamen University, Xiamen 361005, China

Received Date: 04 March 2010

Revised Date: 20 June 2010

Publish Date: 28 February 2011

Abstract

Abstract

A method for determination of V, Cr, Fe, Ni, Cu, Zn, Mo Co, Pb, etc in different crude oils was established by inductively coupled plasma-mass spectrometry assisted with organic solvent microwave digestion. The oil sample was digested by microwave using HNO3-H2O2 as oxidant after dispersing in organic solvent (CH2Cl2). The results showed that the detection limits of the method reached ng/L level for sixteen elements. The linear correlation of the method was preferable with the correlation coefficient of better than 0.9995. The recoveries of the method were in the range of 92%~110% with the precision of less than 5.0%RSD (n＝3). The ratios of w(Ni)/w(V) and w(Fe)/w(V) were distinct in different crude oil samples from oversea and domestic, and the index can be used to the cluster analysis for differencing the crude oil samples.
- trace /
- metal /
- elements /
- crude /
- oil /
- inductively /
- coupled