The sorption study of La(Ⅲ) was carried out on poly[dibenzo-18-crown-6] and L-valine medium. The quantitative adsorption of La(Ⅲ) was found at 1×10-2 to 1×10-5 mol/L L-valine. The various eluting agents we...The sorption study of La(Ⅲ) was carried out on poly[dibenzo-18-crown-6] and L-valine medium. The quantitative adsorption of La(Ⅲ) was found at 1×10-2 to 1×10-5 mol/L L-valine. The various eluting agents were found efficient eluents for La(Ⅲ). The capacity of crown polymer for La(Ⅲ) was found to be 0.43 ±0.01 mmol/g. The tolerance limit of various cations and anions for La(Ⅲ) was determined. La(Ⅲ) was quantitatively separated from other metal ions in binary as well as multicomponent mixtures. The study was extended to sequential separation of La(Ⅲ), U(VI) and Th(IV). The good separation yields were obtained and had good reproducibility (±2%). The method incorporated the determination of La(Ⅲ) in real sample. The method was simple, rapid and selective.展开更多
A column chromatographic method has been developed for the separation and determination of cerium(Ⅲ)using poly[dibenzo-18-crown-6].The separation was carried out in L-valine medium.The adsorption of cerium(Ⅲ)was qua...A column chromatographic method has been developed for the separation and determination of cerium(Ⅲ)using poly[dibenzo-18-crown-6].The separation was carried out in L-valine medium.The adsorption of cerium(Ⅲ)was quantitative from 1×10-1 to 1×10-4 mol/L L-valine.Amongst the various eluents,1.0-8.0 mol/L hydrochloric acid,1.0-8.0 mol/L hydrobromic acid,1.0-8.0 mol/L perchloric acid,1.0-2.0 mol/L sulfuric acid and 4.0-5.0 mol/L acetic acid,were found to be the efficient eluents for cerium(Ⅲ).The capacity of poly[dibenzo-18-crown-6]for cerium(Ⅲ)was(0.428±0.01)mmol/g.The method was applied to the separation of cerium(Ⅲ)from associated elements link uranium(Ⅵ)and thorium(Ⅳ).It was also applied for the determination of cerium(Ⅲ)in geological samples.The method is simple,rapid and selective with good reproducibility(approximately±2%).展开更多
基金Project supported by the University Grants Commission,New Delhi
文摘The sorption study of La(Ⅲ) was carried out on poly[dibenzo-18-crown-6] and L-valine medium. The quantitative adsorption of La(Ⅲ) was found at 1×10-2 to 1×10-5 mol/L L-valine. The various eluting agents were found efficient eluents for La(Ⅲ). The capacity of crown polymer for La(Ⅲ) was found to be 0.43 ±0.01 mmol/g. The tolerance limit of various cations and anions for La(Ⅲ) was determined. La(Ⅲ) was quantitatively separated from other metal ions in binary as well as multicomponent mixtures. The study was extended to sequential separation of La(Ⅲ), U(VI) and Th(IV). The good separation yields were obtained and had good reproducibility (±2%). The method incorporated the determination of La(Ⅲ) in real sample. The method was simple, rapid and selective.
基金This work was supported by the University Grant Commission for awarding Junior Research Fellowship.
文摘A column chromatographic method has been developed for the separation and determination of cerium(Ⅲ)using poly[dibenzo-18-crown-6].The separation was carried out in L-valine medium.The adsorption of cerium(Ⅲ)was quantitative from 1×10-1 to 1×10-4 mol/L L-valine.Amongst the various eluents,1.0-8.0 mol/L hydrochloric acid,1.0-8.0 mol/L hydrobromic acid,1.0-8.0 mol/L perchloric acid,1.0-2.0 mol/L sulfuric acid and 4.0-5.0 mol/L acetic acid,were found to be the efficient eluents for cerium(Ⅲ).The capacity of poly[dibenzo-18-crown-6]for cerium(Ⅲ)was(0.428±0.01)mmol/g.The method was applied to the separation of cerium(Ⅲ)from associated elements link uranium(Ⅵ)and thorium(Ⅳ).It was also applied for the determination of cerium(Ⅲ)in geological samples.The method is simple,rapid and selective with good reproducibility(approximately±2%).
