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

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 I...

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Published inYankuàng cèshi Vol. 35; no. 3; pp. 276 - 283
Main Authors Yan, Hong-ze, Sun, Bin-bin, Xu, Jin-li, Zhou, Guo-hua, He, Ling, Liu, Yin-fei, Wang, Teng-yun
Format Journal Article
LanguageChinese
English
Published Science Press, PR China 01.06.2016
Subjects
ashing method
combination schemes of sample analysis methods
Digestion
Exploration
geoelectrochemistry
Homogeneity
microwave digestion
Microwaves
Perchloric acid
Polyurethane foam
polyurethane foam samples
Spectrometry
Spectroscopy
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Summary: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,(1)For 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.(2) For 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.(3)There is a significant loss in ashing for Hg,so microwave digestion is more suitable.(4)For 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.
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ISSN:0254-5357
DOI:10.15898/j.cnki.11-2131/td.2016.03.010