ISSN:
1432-1130
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract Trace element impurities in high-purity antimony were determined employing three different methods for the removal of matrix; on Dowex 50WX 8 by adsorption from 0.1 mol/L HF and elution with 4 mol/L HNO3; on Chelex-100 resin (in NH4 + form) Bi, Cd, Co, Cu, and Pb were separated in the presence of tartaric acid at a pH of 9.0 ± 0.1 with subsequent elution with 2 mol/L HCl; these determinations were carried out by GFAAS. The separation of trace impurities from Sb by volatilization of the matrix from H2SO4 and HBr medium was also investigated. ICP-MS was used for the determination in these cases. All the three procedures showed that the removal of the antimony matrix was nearly quantitative (〉 99.99%). The recoveries of trace elements were found to be 〉 95%. The relative standard deviations were in the range 2–7%. Standard addition calibrations were used. The levels of process blanks indicate that with careful optimization, the volatilization procedure coupled with ICP-QMS can be used for trace impurity characterization of 6N+ Sb.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s002160051202
