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二苯硫脲-醋酸丁酯萃取-石墨炉原子吸收法测定地球化学样品中痕量银
引用本文:曾志平,卢启余,谷娟平,杨仲平.二苯硫脲-醋酸丁酯萃取-石墨炉原子吸收法测定地球化学样品中痕量银[J].中国无机分析化学,2014,4(3):39-43.
作者姓名:曾志平  卢启余  谷娟平  杨仲平
作者单位:中国有色桂林矿产地质研究院有限公司,广西 桂林 541004;中国有色桂林矿产地质研究院有限公司,广西 桂林 541004;中国有色桂林矿产地质研究院有限公司,广西 桂林 541004;中国有色桂林矿产地质研究院有限公司,广西 桂林 541004
摘    要:对石墨炉原子吸收光谱法测定地球化学样品中痕量银进行了研究。样品经盐酸、硝酸、硫酸、高氯酸溶解,在盐酸(1.2mol/L)介质中用醋酸丁酯萃取银与二苯硫脲螯合物,用石墨炉原子吸收光谱法测定地球化学样品中痕量银,方法检出限为0.011ng/mL,相对标准偏差(RSD,n=11)为6.0%~12.2%,加标回收率为96.00%~105.00%。能满足地球化学样品中银含量为0.02~5μg/g范围内银测定的准确度和精密度的要求。

关 键 词:石墨炉原子吸收光谱法  萃取    地球化学
收稿时间:2014/3/25 0:00:00
修稿时间:2014/3/29 0:00:00

Diphenyl thiourea - butyl acetate extraction and determination of trace silver in geochemical samples with graphite furnace atomic absorption spectrometry
Zeng Zhiping,Lu Qiyu,Gu Juanping and Yang Zhongping.Diphenyl thiourea - butyl acetate extraction and determination of trace silver in geochemical samples with graphite furnace atomic absorption spectrometry[J].Chinese Journal of Inorganic Analytical Chemistry,2014,4(3):39-43.
Authors:Zeng Zhiping  Lu Qiyu  Gu Juanping and Yang Zhongping
Institution:(China Nonferrous Metal(Guilin) Geology and Mining Co. ,Ltd. Guilin ,Guangxi 541004,China)
Abstract:A method for the determination of trace silver in geochemical samples by graphite furnace atomic absorption spectrometry was studied. The samples were digested by hydrochloric acid, nitric acid, sulfuric acid, and perchloric acid. In 1.2 mol/L HC1 medium, butyl acetate and diphenylthiourea chelates were used for the extraction of silver and then the content of trace silver was determined by graphite furnace atomic absorption spectrometry. The detection limit was 0. 011 ng/mL, and the relative standard deviation (RSD, n = 11) was 6. 0% - 12. 2% with 96.0% - 105.00% recovery. It can meet the accuracy and precision requirements for the determination of silver in the range of ω (Ag) was 0. 02 to 5 μg/g in geochemical samples.
Keywords:graphite furnace atomic absorption spectrometry  extraction  silve  geochemical
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