摘要
研究结果表明,P204萃淋树脂在0.5～3mol/LHCl介质吸附钽,在1～8mol/LHCl介质吸附铌,1～3mol/LHCl介质中可同时吸附铌、钽。H2SO4+H2O2溶液解脱铌,酒石酸+HCl溶液解脱钽,H2SO4+H2C2O4溶液能同时解脱铌、钽,从而建立了新的铌和钽分离富集体系。分离后的铌、钽用光度法测定。方法用于测定地质样品中的铌和钽,结果与标准值符合,其RSD(n=7)分别<6%和9%。
The extraction behaviors of Nb and Ta with P204extraction resin are studied in this paper. The results show that Ta can be absorbed in medium of 0.5～3mol/L HCl and deabsorbed with C4H6O6 (tartaric acid)+HCl solution, Nb can be absorbed in medium of 1～8mol/L HCl and deabsorbed with H2SO4+H2O2solution. The results also show that Ta and Nb can be coabsorbed in medium of 1～3 mol/L HCl and deabsorbed with H2SO4+H2C2O4 solution simultaneously. Accordingly, a new system for separation and preconcentration of trace Nb and Ta is established and has been applied to spectro photometric determination of trace Nb and Ta in geological standard reference samples. The results are in agreement with certified values with precision of <6% RSD (n=7) for Nb and <9% RSD (n=7) for Ta.
出处
《岩矿测试》
CAS
CSCD
北大核心
2003年第1期33-36,共4页
Rock and Mineral Analysis
