Cloud point extraction and flame atomic absorption spectrometry analysis of palladium, platinum, and gold ions from industrial polluted soil
来源期刊：Rare Metals2012年第5期
论文作者：LIAN Yuanpei a , ZHEN Wei b , TAI Zhigang a , YANG Yaling a , SONG Jun a , and LI Zonghao a a Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming , China; b Kunming Fruit Business and Economics Co., Ltd., Kunming , China
文章页码：512 - 516
摘 要：Cloud point extraction （CPE） with Tergitol TMN-6 was applied for the extraction of trace amounts of palladium （Pd（Ⅱ））, platinum （Pt（Ⅳ））, and gold （Au（Ⅲ）） in the soil of industrial sewage. Ammonium pyrolysine dithiocarbamate （APDC） was adopted as the chelating agent prior to CPE and then was detected by atomic absorption spectrometry （AAS）. Different parameters such as the concentration of surfactants, chelating agent and salt, sample pH, equilibration temperature and time, centrifugation time and rates, and the effect of foreign ions were studied. Under optimum conditions, the low limits of detections are 1.4, 2.8 and 1.2 ng·ml-1 and the enrichment factors are 21, 12, and 24 for Pd（Ⅱ）, Pt（Ⅳ）, and Au(Ⅲ, respectively. The relative standard deviations vary from 0.6% to 1.0% （n=11）. All correlation coefficients of the calibration curves are >0.9960. The proposed method was successfully applied for the determination of Pd（Ⅱ）, Pt（Ⅳ）, and Au（Ⅲ） in the real soil of industrial sewage samples.
LIAN Yuanpei a , ZHEN Wei b , TAI Zhigang a , YANG Yaling a , SONG Jun a , and LI Zonghao a a Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650224, China; b Kunming Fruit Business and Economics Co., Ltd., Kunming 650106, China
摘 要：Cloud point extraction （CPE） with Tergitol TMN-6 was applied for the extraction of trace amounts of palladium （Pd（Ⅱ））, platinum （Pt（Ⅳ））, and gold （Au（Ⅲ）） in the soil of industrial sewage. Ammonium pyrolysine dithiocarbamate （APDC） was adopted as the chelating agent prior to CPE and then was detected by atomic absorption spectrometry （AAS）. Different parameters such as the concentration of surfactants, chelating agent and salt, sample pH, equilibration temperature and time, centrifugation time and rates, and the effect of foreign ions were studied. Under optimum conditions, the low limits of detections are 1.4, 2.8 and 1.2 ng·ml-1 and the enrichment factors are 21, 12, and 24 for Pd（Ⅱ）, Pt（Ⅳ）, and Au(Ⅲ, respectively. The relative standard deviations vary from 0.6% to 1.0% （n=11）. All correlation coefficients of the calibration curves are >0.9960. The proposed method was successfully applied for the determination of Pd（Ⅱ）, Pt（Ⅳ）, and Au（Ⅲ） in the real soil of industrial sewage samples.
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