固态进样方式石墨炉原子吸收光谱法测定沙痕量金
GF-AAS Determination of Pico-Trace Amounts of Gold Using Solid State Sample Introduction
摘 要
报道了地质样品中痕量金用表面涂有磷酸三丁酯的聚氨酯泡沫塑料(PUPF)吸附富集后用石墨炉原子吸收光谱法(GF-AAS)测定,测定中采用外形改变的热解石墨管,表面吸附有金离子的PUPF毋需经过解吸操作,直接引入石墨管中进行测定.将吸附有金的PUPF固体物直接进样的方式的特点反映在两方面:① 避免了因解吸操作而引起的金的损失;② 降低方法的检出限至沙痕量级.在3个浓度水平上作了精密度试验,测得方法的RSD(n=11)值≤3.6%.用标准加入法作回收率试验,所得结果在102%~107%之间.该方法的检出限为10 pg·g-1,应用此法分析了一件标准物质样品(GBW 07242),测出的金含量与证书值相符,进一步证明了方法的准确性.
石墨炉原子吸收光谱法
沙痕量金
地质样品
Solid state-sample introduction
Graphite furnace-atomic absorption spectrometry
Picotrace amount of gold
Geochemical sample
Abstract
It is reported that traces of gold in geochemical samples were preconcentrated by adsorption on tributylphosphate (TBP) coated polyurethane plastic foam (PUPF),and determined by GF-AAS with re-shaped thermal decomposition graphite tube.The PUPF with the adsorbed gold ion was introduced directly into the graphite tube and gold adsorbed was determined by AAS.Application of direct sample introduction of the PUPF with adsorbed auric ion gave specific features in 2 aspects:① loss of gold in the desorption procedure was avoided;and ② the value of detection limit was lowered to pico-trace level.Test for precision was made at 3 concentration levels,giving values of RSD (n=11) ≤3.6%.Results of recovery test obtained were in the range from 102%-107%.Detection limit of this method was found to be 10 pg·g-1.The accuracy of the proposed method was checked by analyzing a CRM (GBW 07242) sample for its gold content,results obtained were in consistency with the certified value.
中图分类号 O657.31
所属栏目 试验与研究
基金项目
收稿日期 2006/6/19
修改稿日期
网络出版日期
作者单位点击查看
备注李勇(1969-),男,沈阳市人,高级工程师,主要从事化学分析测试工作.
引用该论文: LI Yong. GF-AAS Determination of Pico-Trace Amounts of Gold Using Solid State Sample Introduction[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2007, 43(9): 716～718
李勇. 固态进样方式石墨炉原子吸收光谱法测定沙痕量金[J]. 理化检验－化学分册, 2007, 43(9): 716～718
共有人对该论文发表了看法，其中：
人认为该论文很差
人认为该论文较差
人认为该论文一般
人认为该论文较好
人认为该论文很好
参考文献
【1】周红.用载炭泡塑吸附原子吸收法测定地质样品中金[J].黄金地质,2001,7(2):64-65．
【2】李承元.采用经TBP浸泡处理的泡沫动态吸附微量金[J].理化检验-化学分册,1986,22(6):352-354．
【3】卢兵,李勇,王丽娟,等.泡沫塑料吸附发射光谱法测定痕量金方法的改进[J].黄金,2004,25(10):52-53．
【4】张碧玲,孙爱琴,姚文生,等.石墨炉原子吸收测定岩石样品中痕量金的研究[J].黄金,2005,26(2):42-44．
【5】李勇,王丽娟,孟令晶,等.用双孔热解石墨管原子吸收法测定微量金[J].黄金地质,2003,9(1):63-65．
【6】王淑梅,蒋 莉.泡塑负载正三辛胺萃取-石墨炉原子吸收法测定痕量金[J].分析试验室,2000,19(4):95．
【7】熊照春.泡塑静态吸附金全过程研究[J].岩石矿物及测试,1985,4(2):146-147．
【8】中国人民武装警察部队黄金指挥部.地质勘察工作标准化手册[Z].2000:217-239．
【2】李承元.采用经TBP浸泡处理的泡沫动态吸附微量金[J].理化检验-化学分册,1986,22(6):352-354．
【3】卢兵,李勇,王丽娟,等.泡沫塑料吸附发射光谱法测定痕量金方法的改进[J].黄金,2004,25(10):52-53．
【4】张碧玲,孙爱琴,姚文生,等.石墨炉原子吸收测定岩石样品中痕量金的研究[J].黄金,2005,26(2):42-44．
【5】李勇,王丽娟,孟令晶,等.用双孔热解石墨管原子吸收法测定微量金[J].黄金地质,2003,9(1):63-65．
【6】王淑梅,蒋 莉.泡塑负载正三辛胺萃取-石墨炉原子吸收法测定痕量金[J].分析试验室,2000,19(4):95．
【7】熊照春.泡塑静态吸附金全过程研究[J].岩石矿物及测试,1985,4(2):146-147．
【8】中国人民武装警察部队黄金指挥部.地质勘察工作标准化手册[Z].2000:217-239．
相关信息
