Improved determination of mercury complex with Thiomicher's ketone by β-correction spectrophotometry

Determination of the mercury complex formed with Thiomicher's ketone (TMK) was improved by beta-correction spectrophotometry in the presence of a nonionic surfactant at pH 5. The complex formed was Hg(TMK)2, and its true molar absorptivity is reported for the first time: epsilon Hg(TMK)2(560) =...

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Bibliographic Details
Published in:Journal of AOAC International 2000, Vol.83 (1), p.231-236
Main Authors: GAO, H.-W, ZHANG, S.-Y, YE, S.-M
Format: Article
Language:English
Subjects:
Analytical chemistry
Applied sciences
Chelating Agents - analysis
Chemistry
Drug Stability
Exact sciences and technology
Hydrogen-Ion Concentration
Industrial Waste
Industrial wastewaters
Ketones - analysis
Ketones - chemistry
Mercury Compounds - analysis
Mercury Compounds - chemistry
Pollution
Sensitivity and Specificity
Solutions
Spectrometric and optical methods
Spectrophotometry - methods
Wastewaters
Water - chemistry
Water treatment and pollution
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Summary:Determination of the mercury complex formed with Thiomicher's ketone (TMK) was improved by beta-correction spectrophotometry in the presence of a nonionic surfactant at pH 5. The complex formed was Hg(TMK)2, and its true molar absorptivity is reported for the first time: epsilon Hg(TMK)2(560) = 1.04 x 10(5) L/mol.cm. In addition, the stability constant of Hg(TMK)2 was equal to 3.64 x 10(10) at an ion strength of 0.01 at 20 degrees C. Results from analyses of wastewater samples showed that the relative standard deviations were < or = 8.3%, and the recoveries of mercury ranged from 90 to 110%.
ISSN:1060-3271
1944-7922
DOI:10.1093/jaoac/83.1.231