Repository of Research and Investigative Information

Repository of Research and Investigative Information

Ilam University of Medical Sciences

Floatation-spectrophotometric determination of thorium, using complex formation with eriochrome cyanine R

Sat Jun 25 09:56:23 2022

(2011) Floatation-spectrophotometric determination of thorium, using complex formation with eriochrome cyanine R. Analytical Chemistry Insights. pp. 1-6. ISSN 11773901 (ISSN)

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Official URL: https://www.scopus.com/inward/record.uri?eid=2-s2....

Abstract

A novel and sensitive floatation-spectrophotometric method is presented for determination of trace amounts of thorium in water samples. The method is based on the ion-associated formation between thorium, Eriochrome cyanine R and Brij-35 at pH = 4 media. The complex was floated in the interface of the aqueous phase and n-hexane by vigorous shaking. After removing the aqueous phase the floated particles were dissolved in methanol and the absorbance was measured at 607 nm. The influence of different important parameters such as Eriochrome cyanine R and surfactants concentration, pH, volume of n-hexane, standing time and interfering ions were evaluated. Under optimized conditions the calibration graph was linear in the range of 6-230 ng mL-1 of thorium with a correlation coefficient of 0.9985. The limit of detections (LOD), based on signal to noise ratio (S/N) of 3 was 1.7 ng mL-1. The relative standard deviations for determination of 150 and 30 ng ml-1 of thorium were 3.26 and 4.41, respectively (n = 10). The method showed a good linearity, recoveries, as well as some advantages such as sensitivity, simplicity, affordability and a high feasibility. The method was successfully applied to determine thorium in different water and urine samples. © the author(s), publisher and licensee Libertas Academica Ltd.

Item Type: Article
Creators:
CreatorsEmail
Shiri, S.UNSPECIFIED
Delpisheh, A.UNSPECIFIED
Haeri, A.UNSPECIFIED
Poornajaf, A.UNSPECIFIED
Khezeli, T.UNSPECIFIED
Badkiu, N.UNSPECIFIED
Keywords: Eriochrome cyanine R Flotation-spectrophotometric Thorium
Divisions:
Page Range: pp. 1-6
Journal or Publication Title: Analytical Chemistry Insights
Journal Index: Scopus
Volume: 6
Number: 1
Identification Number: https://doi.org/10.4137/ACI.S5949
ISSN: 11773901 (ISSN)
Depositing User: مهندس مهدی شریفی
URI: http://eprints.medilam.ac.ir/id/eprint/1619

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