Sorption of arsenic, antimony and bismuth on glycolmethacrylate gels with bound thiol groups for direct sampling in electrothermal atomic absorption spectrometry
1980; Elsevier BV; Volume: 117; Linguagem: Inglês
10.1016/0003-2670(80)87029-2
ISSN1873-4324
Autores Tópico(s)Water Quality Monitoring and Analysis
ResumoBatch 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.
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