Determination of Trace Metal Elements in Solid Bitumen with Microwave Digestion by Inductively Coupled Plasma-Atomic Emission Spectrometry

Liang-bang MA; Ying GE

2013 Vol. 32, No. 3

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Liang-bang MA, Ying GE. Determination of Trace Metal Elements in Solid Bitumen with Microwave Digestion by Inductively Coupled Plasma-Atomic Emission Spectrometry[J]. Rock and Mineral Analysis, 2013, 32(3): 441-444.

Citation:

Liang-bang MA, Ying GE. Determination of Trace Metal Elements in Solid Bitumen with Microwave Digestion by Inductively Coupled Plasma-Atomic Emission Spectrometry[J]. Rock and Mineral Analysis, 2013, 32(3): 441-444.

Determination of Trace Metal Elements in Solid Bitumen with Microwave Digestion by Inductively Coupled Plasma-Atomic Emission Spectrometry

Liang-bang MA^1,2,,
Ying GE^1,2

1.
Key Laboratory of Petroleum Accumulation Mechanisms, SINOPEC, Wuxi 214126, China
2.
Wuxi Research Institute of Petroleum Geology, Research Institute of Petroleum Exploration and Development, Wuxi 214126, China

Received Date: 03 September 2012

Accepted Date: 19 October 2012

Abstract

Abstract

Trace element information in crude oil and bitumen has been applied to oil and gas exploration and geochemical study, but the analysis methods of bitumen are limited and the pretreatment process is tedious. To overcome this, microwave digestion was used to digest the solid bitumen sample and a method was developed for the determination of the 13 trace elements Al, Ca, Fe, K, Mg, Mn, Na, Ti, Ba, Mo, Ni, Sr and V by Inductively Coupled Plasma-Atomic Emission Spectrometry (ICP-AES). The bitumen sample can be digested quickly in closed vessels by microwave at high temperature and pressure. The optimization experiment of the different digestion reagents systems showed that HNO₃-HF digestion system was the best to decompose the solid bitumen. Experimental conditions and sampling weight are discussed. The results show that the method can be used to digest the bitumen sample without loss of volatile elements and contamination in the process of digestion. The recoveries of the method were in the range of 92.2%-101.0% with the precision of less than 5.0%RSD (n=8), and the detection limit was up to 0.05 μg/g. This method can provide a new reference method for the determination of trace metal elements in solid bitumen.
- solid bitumen /
- trace metal elements /
- microwave digestion /
- Inductively Coupled Plasma-Atomic Emission Spectrometry

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References

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