M
M.M. El-Defrawy
Researcher at Mansoura University
Publications - 36
Citations - 626
M.M. El-Defrawy is an academic researcher from Mansoura University. The author has contributed to research in topics: Atomic absorption spectroscopy & Chemistry. The author has an hindex of 9, co-authored 31 publications receiving 532 citations.
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Journal ArticleDOI
Elimination of ionic interference effects in the atomic absorption spectrometric determination of ruthenium
Journal ArticleDOI
Cloud point extraction coupled with back-extraction for speciation of inorganic vanadium in water and determination of total vanadium in food samples by ICP-OES
TL;DR: In this article , a preconcentration procedure based on cloud point extraction and back-extraction (CPE-BE) was proposed for speciation of inorganic vanadium (V 4+ and V 5+ ) followed by determination by inductively coupled plasma-optical emission spectrometry (ICP-OES).
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Selective separation of gadolinium from a series of f-block elements by cloud point extraction and its application for analysis of real samples
TL;DR: In this paper, a selective and effective cloud point extraction procedure was presented for separation of Gd3+ from other f-block elements (i.e. La3+, Ce3+, Nd3+, Sm3+, Ho3+, Er3+, Th4+ and U6+).
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Spectroscopic characterization and biological activity of dihydrazone transition metal complexes: Crystal structure of 2,3-butanedione bis(isonicotinylhydrazone)
Ahmed E. M. El-Sayed,Othman A. Al-Fulaij,A.A. Elaasar,M.M. El-Defrawy,Ahmed A. El-Asmy,Ahmed A. El-Asmy +5 more
TL;DR: The decomposition of the complexes revealed the outer and inner solvents as well as the remaining residue based on TGA, and the complexes have variable activities against some bacteria and fungi.
Journal ArticleDOI
Elimination of the interfering effects of ligands in the determination of cobalt by atomic absorption spectrometry
TL;DR: In this paper, the interfering effects of different complex-forming substances can be completely eliminated by addition of excess of cyanide in atomic absorption spectrometric determinations of cobalt (II) and cobalt(III).