Affiliation:
1. Department of Chemistry, Faculty of Science, K. N. Toosi University of Technology, Tehran, Iran
2. Chemistry Department, College of Sciences, Semnan University, Semnan, Iran
Abstract
In this study, a simple, sensitive and accurate column preconcentration
method was developed for the determination of Cd, Cu and Pb ions in river
water, urine and sediment samples by flame atomic absorption spectrometry.
The procedure is based on the retention of the analytes on a mixed cellulose
ester membrane (MCEM) column from buffered sample solutions and then their
elution from the column with nitric acid. Several parameters, such as pH of
the sample solution, volume of the sample and eluent and flow rates of the
sample were evaluated. The effects of diverse ions on the preconcentration
were also investigated. The recoveries were >95 %. The developed method was
applied to the determination of trace metal ions in river water, urine and
sediment samples, with satisfactory results. The 3? detection limits for Cu,
Pb and Cd were found to be 2, 3 and 0.2 ?g dm?3, respectively. The presented
procedure was successfully applied for determination of the copper, lead and
cadmium contents in real samples, i.e., river water and biological samples.
Publisher
National Library of Serbia
Cited by
20 articles.
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