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A New Spectrophotometric Method for Determination of Selenium in Cosmetic and Pharmaceutical Preparations after Preconcentration with Cloud Point Extraction
Joint Authors
Soruraddin, Mohammad Hosein
Heydari, Rouhollah
Zahedi, Mir Mehdi
Puladvand, Morteza
Source
International Journal of Analytical Chemistry
Issue
Vol. 2011, Issue 2011 (31 Dec. 2011), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2011-04-05
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
A simple, rapid, and sensitive spectrophotometric method for the determination of trace amounts of selenium (IV) was described.
In this method, all selenium spices reduced to selenium (IV) using 6 M HCl.
Cloud point extraction was applied as a preconcentration method for spectrophotometric determination of selenium (IV) in aqueous solution.
The proposed method is based on the complexation of Selenium (IV) with dithizone at pH < 1 in micellar medium (Triton X-100).
After complexation with dithizone, the analyte was quantitatively extracted to the surfactant-rich phase by centrifugation and diluted to 5 mL with methanol.
Since the absorption maxima of the complex (424 nm) and dithizone (434 nm) overlap, hence, the corrected absorbance, Acorr, was used to overcome the problem.
With regard to the preconcentration, the tested parameters were the pH of the extraction, the concentration of the surfactant, the concentration of dithizone, and equilibration temperature and time.
The detection limit is 4.4 ng mL-1; the relative standard deviation for six replicate measurements is 2.18% for 50 ng mL-1 of selenium.
The procedure was applied successfully to the determination of selenium in two kinds of pharmaceutical samples.
American Psychological Association (APA)
Soruraddin, Mohammad Hosein& Heydari, Rouhollah& Puladvand, Morteza& Zahedi, Mir Mehdi. 2011. A New Spectrophotometric Method for Determination of Selenium in Cosmetic and Pharmaceutical Preparations after Preconcentration with Cloud Point Extraction. International Journal of Analytical Chemistry،Vol. 2011, no. 2011, pp.1-8.
https://search.emarefa.net/detail/BIM-494045
Modern Language Association (MLA)
Soruraddin, Mohammad Hosein…[et al.]. A New Spectrophotometric Method for Determination of Selenium in Cosmetic and Pharmaceutical Preparations after Preconcentration with Cloud Point Extraction. International Journal of Analytical Chemistry No. 2011 (2011), pp.1-8.
https://search.emarefa.net/detail/BIM-494045
American Medical Association (AMA)
Soruraddin, Mohammad Hosein& Heydari, Rouhollah& Puladvand, Morteza& Zahedi, Mir Mehdi. A New Spectrophotometric Method for Determination of Selenium in Cosmetic and Pharmaceutical Preparations after Preconcentration with Cloud Point Extraction. International Journal of Analytical Chemistry. 2011. Vol. 2011, no. 2011, pp.1-8.
https://search.emarefa.net/detail/BIM-494045
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-494045