Sorption of arsenic,antimony and bismuth on glycolmethacrylate gels with bound thiol groups for direct sampling in electrothermal atomic absorption spectrometry |
| |
Authors: | Z. Slovák B. Dočekal |
| |
Affiliation: | Research Institute of Pure Chemicals, Lachema, CS-621 33 BrnoCzechoslovakia |
| |
Abstract: | Batch sorption of arsenic, antimony and bismuth from solutions in 1 M sulphuric acid has distribution coefficients of 104–105. Quantitative sorption on the hydrophilic methacrylate gel containing thiol groups (Spheron Thiol) is possible within 60 min for bismuth or arsenic and 120 min for antimony. Conditions for the electrothermal atomization of arsenic sorbed on Spheron Thiol and injected into the graphite tube as a suspension are optimized. The sensitivities possible are 3.2 ng As ml-1, 13 ng Sb ml-1 and 2.8 ng Bi ml-1; the coefficient of variation for 10 ng of As is 4%. Complete recovery of 40 ng As ml-1 added to solutions of 5% KCI or 5% MgCl2 and to river water was obtained. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|