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Determination ol selenium in biological matrices using catalytic spectrophotometric method.
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023350.pdf
Date
1992
Author
Ekhlass, Abdel-Qader
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https://hdl.handle.net/11511/8897
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Graduate School of Natural and Applied Sciences, Thesis
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A simple and sensitive catalytic spectrophotometric method was developed for the determination of selenium in biological matrices. The method is based on the catalytic effect of selenium on the reaction of Methylene Blue (MB) with sodium sulfide. For a given reaction between MB and sodium sulfide, the change in the MB absorbance with time was monitored, then the time (t) required for completion of the reaction was determined, and t(-1) was calculated. A plot of t(-1) versus selenium concentration constitute...
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A.-Q. Ekhlass, “Determination ol selenium in biological matrices using catalytic spectrophotometric method.,” Middle East Technical University, 1992.