摘要
建立了固相萃取-电感耦合等离子体质谱测定地质样品中痕量Nb的分析方法。采用两种方法合成氧化石墨烯/壳聚糖/吡咯烷二硫代甲酸铵复合微球吸附材料,对地质样品中的Nb进行分离富集,并采用电感耦合等离子体质谱进行检测。对pH、吸附时间、吸附剂用量、吸附初始浓度等吸附条件和洗脱剂、洗脱剂体积、洗脱时间等洗脱条件进行了优化。在最佳条件下,Nb分别在0.0093~100μg/g和0.0073~100μg/g范围内呈良好的线性,检出限分别为2.8 ng/g和2.2 ng/g,富集倍数分别为17.4倍和17.8倍。方法适用于地质样品中痕量Nb的测定。
A method was established for the determination of trace Nb in geological samples by solid phase extraction - inductively coupled plasma mass spectrometry. Graphene oxide/ehitosan/ammonium pyrrolidine dithioearbamate（GOCSA） mierosphere adsorption materials were prepared by two different methods and used for the separation and preconcentration of Nb in geological samples before ICP - MS analysis. The adsorption conditions such as pH, adsorption time, adsorbent amount, initial adsorption concentration and elution conditions such as eluent, eluent volume and elution time were optimized. Under the optimum experimental condition, this method showed good linearity for the detection of Nb in the range of 0. 0093 - 100 μg/g and 0. 0073 - 100 μg/g respectively with the detection limits of 2. 8 ng/g and 2.2 ng/g, respectively, with the enrichment factors of 17.4 and 17.8. The method is suitable for the determination of trace niobium in geological samples.
作者
孔贝贝
孔亚飞
张素芬
包娅琪
马真真
邱海鸥
KONG Bei-bei;KONG Ya-fei;ZHANG Su-fen;BAO Ya-qi;MA Zhen-zhen;QIU Hai-ou(Faculty of Materials Science and Chemistry,China University of Geosciences（Wuhan）,Wuhan 430074;114 Geological Brigade of Buraeu of Geology and Mineral Exploration and Development Guizhou Province,Zunyi 563000)
出处
《分析试验室》
CAS
CSCD
北大核心
2018年第10期1156-1159,共4页
Chinese Journal of Analysis Laboratory
基金
中国地质调查局项目(2013030037)资助
关键词
氧化石墨烯/壳聚糖微球
吡咯烷二硫代甲酸铵
铌
分离富集
Graphene oxide/Chitosanmierosphere
Ammonium pyrrolidine dithiocarbamate
Niobum
Separation and preeoncentration
