Development of a Selective and Sensitive Spectrophotometric Method for the Trace Determination of Thallium(III) Using 3-Methyl-2-benzothiazolinone Hydrazone Hydrochloride and N-(1-naphthyl)-ethylenediamine Dihydrochloride

A simple, selective, sensitive, and rapid spectrophotometric method has been developed for the determination of thallium(III) using 3-methyl-2-benzothiazolinone hydrazone hydrochloride and N-(1-naphthyl)-ethylenediamine dihydrochloride. The obtained product had an absorption maximum of 590 nm. Beer&...

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Bibliographic Details
Published in:Journal of AOAC International 2008-09, Vol.91 (5), p.1116-1123
Main Authors: Nagaraja, Padmarajaiah, Al-Tayar, Naef Ghllab Saeed, Kumar, Anantharaman Shiva
Format: Article
Language:English
Subjects:
Benzothiazoles - chemistry
Biological and medical sciences
environmental fate
Environmental Monitoring
Environmental Pollutants - analysis
Ethylenediamines - chemistry
Food industries
Fundamental and applied biological sciences. Psychology
heavy metals
Humans
Hydrazones - chemistry
Hydrogen-Ion Concentration
Indicators and Reagents
new methods
Oxidation-Reduction
pollution
quantitative analysis
rapid methods
Reference Standards
Reproducibility of Results
spectrophotometers
Spectrophotometry, Ultraviolet
Temperature
thallium
Thallium - analysis
Thallium - urine
Water Supply - analysis
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Summary:A simple, selective, sensitive, and rapid spectrophotometric method has been developed for the determination of thallium(III) using 3-methyl-2-benzothiazolinone hydrazone hydrochloride and N-(1-naphthyl)-ethylenediamine dihydrochloride. The obtained product had an absorption maximum of 590 nm. Beer's law was valid over the concentration range of 0.15-8 μg/mL. The molar absorptivity and Sandell's sensitivity of the colored system were 2.93 x 10⁴ L/mol·cm and 0.00723 μg/mL, respectively. The effect of different acids on the sensitivity of the method, interference by foreign substances, the optimum reaction conditions, and other analytical parameters were evaluated. The proposed method has been successfully applied in the analysis of Tl(III) in standard reference materials, synthetic mixtures, and water and urine samples. The performance of the proposed method was evaluated in terms of Student's t-test and variance ratio F-test, which indicated the significance of the proposed method over reported methods.
ISSN:1060-3271
1944-7922
DOI:10.1093/jaoac/91.5.1116