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Yi-fei MA, Guang-heng WANG, Ni ZHANG, Wen-xu GAO, Bin QUAN. Application of Carbon-loaded Polyurethane Foam Produced by Ethanol Media in Determination of Gold in Geological Samples[J]. Rock and Mineral Analysis, 2018, 37(5): 533-540. DOI: 10.15898/j.cnki.11-2131/td.201801150005
Citation: Yi-fei MA, Guang-heng WANG, Ni ZHANG, Wen-xu GAO, Bin QUAN. Application of Carbon-loaded Polyurethane Foam Produced by Ethanol Media in Determination of Gold in Geological Samples[J]. Rock and Mineral Analysis, 2018, 37(5): 533-540. DOI: 10.15898/j.cnki.11-2131/td.201801150005
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Application of Carbon-loaded Polyurethane Foam Produced by Ethanol Media in Determination of Gold in Geological Samples

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  • BACKGROUND Compared with unloaded polyurethane foam, carbon-loaded polyurethane foam can effectively increase the adsorption capacity of gold, but the existing preparation method of carbon-loaded polyurethane foam is not efficient.OBJECTIVESTo shorten the preparation time of carbon-loaded polyurethane foam, improve the preparation efficiency, and optimize experimental conditions.METHODSActivated carbon-ethanol solution was used to prepare carbon-loaded polyurethane foam. By optimizing conditions such as the load medium type, reagent concentration, and soaking time, the time for preparing 100 carbon-loaded polyurethane foams can be reduced to under 30 min. A method for the determination of gold in geological samples by Inductively Coupled Plasma-Optical Emission Spectrometry (ICP-OES) combined with carbon-loaded polyurethane foam is described.RESULTSThe experimental results show that the oscillation time can be shortened to 20 min. The mass concentration of gold has a good linear relationship with the spectral intensity in the range of 0-100 μg/mL with the correlation coefficient of 0.9997. The detection limit (3σ) is 0.0066 μg/g, and the relative standard deviations of the results are 0.81%-2.11% (n=10).CONCLUSIONSFour certified reference materials of gold ore are used to evaluate the method. The results show good accuracy and precision, and the method meets the requirements of geological sample analysis.

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