DETERMINATION OF MERCURY ION IN RIVER WATER BY SOLVENT EXTRACTION WITH 5-METHYL-1,3,4-THIODIAZOLE-2-THIOL FOLLOWED BY REVERSED PHASE HPLC

A determination method for mercury (Hg) ion in river water has been developed by reversed phase HPLC. The Hg(II) ion was quantitatively extracted into benzene from an acidic solution as 5-methyl-1,3,4-thiodiazole-2-thiol (MTT) chelate. The extracted Hg-MTT chelate was then separated on a C 18 column...

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Bibliographic Details
Published in:	Journal of liquid chromatography & related technologies Vol. 33; no. 6; pp. 793 - 801
Main Authors:	Ichinoki, Susumu, Ishizawa, Akiko, Asano, Mayumi, Fujii, Youichi
Format:	Journal Article
Language:	English
Published:	Colchester Taylor & Francis Group 01-01-2010 Taylor & Francis
Subjects:	5-methyl-1,3-4-thiodiazole-2-thiol Analysis methods Analytical chemistry Applied sciences Chemistry Chromatographic methods and physical methods associated with chromatography Exact sciences and technology mercury ion Natural water pollution Other chromatographic methods Pollution river water solvent extraction Water treatment and pollution Mercury II Compounds Chemical analysis HPLC chromatography Solvent extraction Heavy metal Reversed phase chromatography Ultraviolet detector Sample preparation 5-methyl-1,3-4-thiodiazole-2-thiol Surface water Chelating agent mercury ion Ion extraction Water pollution River water Quantitative analysis
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Summary:	A determination method for mercury (Hg) ion in river water has been developed by reversed phase HPLC. The Hg(II) ion was quantitatively extracted into benzene from an acidic solution as 5-methyl-1,3,4-thiodiazole-2-thiol (MTT) chelate. The extracted Hg-MTT chelate was then separated on a C 18 column with an eluent of methanol/water/0.01 mol/L MTT (72:26:2, v/v) and detected at 270 nm. The correlation coefficients of the calibration curves obtained with 5 mL Hg standards were more than 0.999 in the range of 0.1 to 10 μg/mL (ppm). The detection limit of the Hg ion in 5 mL of water was 0.05 ppm by a signal to noise ratio of 3. Relative standard deviations of peak areas (N = 6) for 5 and 0.5 ppm Hg standards were less than 1%. Effects of foreign ions on the determination of 0.4 ppm Hg were investigated with 57 metal ions. Almost none of the ions interfered except for Au(III), Cu(II), Pt(IV), Ag(I), Cr(VI), and Pd(II) ions. The recoveries with a spiked river water sample for 5 and 0.5 ppm Hg ion (N = 6) were 100.0 ± 0.8% and 99.3 ± 0.9%, respectively.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	1082-6076 1520-572X
DOI:	10.1080/10826071003684265