Comparison of Ashing and Microwave Digestion in Analyzing Geoelectrochemical Polyurethane Foam Samples

Hong-ze YAN; Bin-bin SUN; Jin-li XU; Guo-hua ZHOU; Ling HE; Yin-fei LIU; Teng-yun WANG

doi:10.15898/j.cnki.11-2131/td.2016.03.010

2016 Vol. 35, No. 3

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Hong-ze YAN, Bin-bin SUN, Jin-li XU, Guo-hua ZHOU, Ling HE, Yin-fei LIU, Teng-yun WANG. Comparison of Ashing and Microwave Digestion in Analyzing Geoelectrochemical Polyurethane Foam Samples[J]. Rock and Mineral Analysis, 2016, 35(3): 276-283. doi: 10.15898/j.cnki.11-2131/td.2016.03.010

Citation:

Hong-ze YAN, Bin-bin SUN, Jin-li XU, Guo-hua ZHOU, Ling HE, Yin-fei LIU, Teng-yun WANG. Comparison of Ashing and Microwave Digestion in Analyzing Geoelectrochemical Polyurethane Foam Samples[J]. Rock and Mineral Analysis, 2016, 35(3): 276-283. doi: 10.15898/j.cnki.11-2131/td.2016.03.010

Comparison of Ashing and Microwave Digestion in Analyzing Geoelectrochemical Polyurethane Foam Samples

1.
School of Earth Sciences and Resources, China University of Geosciences (Beijing), Beijing 100083, China
2.
Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang 065000, China
3.
Key Laboratory for Geochemical Exploration Technology, Ministry of Land and Resources, Langfang 065000, China

More Information

Corresponding author: Bin-bin SUN, sunbinbin@igge.cn

Received Date: 25 November 2015

Revised Date: 06 May 2016

Accepted Date: 20 May 2016

Abstract

Abstract

Currently, the ashing method is widely used to pretreat geo-electrochemical polyurethane foam samples. However, there may be volatilization loss of some elements such as Hg and As under high temperature. A geo-electrochemical exploration line in Luokedun hydrothermal lead-zinc polymetallic deposit in Inner Mongolia was selected as the research subject. A comparison of the exploration effects between the ashing method and microwave digestion in pretreating foam samples was made, and the contents of some related elements by High Resolution Inductively Coupled Plasma-Mass Spectrometry (HR-ICP-MS) and Atomic Fluorescence Spectrometry (AFS) were measured. Results are as follows, ①For more than ten elements including Zn, Cu, Fe, and La, abnormal patterns of the two methods were identical within uncertainty measurements and thus both methods can be used according to the work requirement. ②For Au and Pb, microwave digestion has serious problems related to homogeneity, representative and detection limit due to the small sample volume, making ashing the more suitable method. ③There is a significant loss in ashing for Hg, so microwave digestion is more suitable. ④For As, both analytical methods suffer a lot problems, therefore, dissolving the samples directly by nitric and perchloric acid using the pretreatment method for plant samples would be the preferable method.
- geoelectrochemistry /
- polyurethane foam samples /
- ashing method /
- microwave digestion /
- combination schemes of sample analysis methods

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References

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