Gold and silver determination in Waters by SPHERON® Thiol 1000 preconcentration and ETAAS
-
J. Medveď
,
P. Matúš
Abstract
A reliable procedure for the electrothermal atomic absorption spectrometry (ETAAS) determination of gold and silver in waters at trace level is described. The method is based on prior separation and preconcentration of the metals using a chelating sorbent SPHERON® Thiol 1000 after acidification of water samples (pH < 3) with nitric acid. Optimization of analytical variables during enrichment and ETAAS determination of the metals are discussed. The accuracy of the method is verified by analysis of certified reference materials. The limits of determinations based on 10 σ definition were 0.005 ng cm−3 for Au and 0.02 ng cm−3 for Ag. Precision of studied elements determination expressed by relative standard deviation varied in the range from 2.9 % to 16.4 %.
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© 2006 Institute of Chemistry, Slovak Academy of Sciences
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Artikel in diesem Heft
- Carbon dioxide production in the oscillating Belousov—Zhabotinsky reaction with oxalic acid
- Potentiometric and thermodynamic studies of 3-methyl-1-phenyl-{p-[N-(pyrimidin-2-yl)-sulfamoyl]phenylazo}-2-pyrazolin-5-one and its metal complexes
- Spectral and electrochemical study of coordination molecules Cu4OX6L4: 3-Methylpyridine and 4-Methylpyridine Cu4OBrnCl(6−n)L4 complexes
- Anodic stripping voltammetric determination of lead and cadmium in soil extracts
- Gold and silver determination in Waters by SPHERON® Thiol 1000 preconcentration and ETAAS
- Syntheses, geometry optimization, and electronic structure of N-and C-substituted benzonaphthyridines
- Synthesis, spectral description, and lipophilicity parameters determination of phenylcarbamic acid derivatives with integrated N-phenylpiperazine moiety in the structure
- New methods in synthesis of acetylcholinesterase reactivators and evaluation of their potency to reactivate cyclosarin-inhibited AChE
- Furan-containing thiacyanine analogs and their antimicrobial activity
- Synthesis and biological activity of new 1,3,4-thiadiazole derivatives
- Synthesis and identification of immunogen medroxyprogesterone acetate residues in edible foods and preparation of the Antisera
- Synthesis and characterization of oligosalicylaldehyde-based epoxy resins
- Extracellular polysaccharides produced by acapsular mutant of Cryptococcus laurentii
- Liquid chromatography of synthetic polymers under limiting conditions of insolubility. I. Principle of the method
- Transport velocities of different particulate materials in pneumatic conveying
- Nitrous oxide emissions from waste incineration
