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Abstract

Water-soluble sulfonate and the novel carboxylate analogues of dithizone, combined with ion interaction chromatography on a Dionex Acclaim 120 C18 silica column (250 × 4.6 mm id) with an eluent consisting of 10 mM tetrabutylammonium bromide and 60:40 methanol:water, have been developed as highly sensitive chromogenic ligands for the quantitative isocratic determination of inorganic and organo-mercury compounds in aqueous matrices in under 12 min. Using an optimised post column reagent system containing 0.65 mM dye, 0.5% Triton X-100 and 50 mM sodium hydroxide, good linearity (0–7.5 mg L–1R2 > 0.999), reproducibility using peak area measurements (RSD 0.69–1.38%, n= 8), and limits of detection (4–12 µg L–1) were achieved for methyl mercury, inorganic mercury and phenyl mercury.

Item Type:	Article
Authors/Creators:	Shaw, MJ and Jones, P and Haddad, PR
Journal or Publication Title:	Analyst
ISSN:	0003-2654
DOI / ID Number:	10.1039/b308834k
Additional Information:	© Royal Society of Chemistry 2008
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