Riyad AlokabTaiz University · Department of chemistryt
Riyad Alokab
Ph.D in analytical chemistry
About
7
Publications
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92
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Introduction
Additional affiliations
January 2009 - August 2018
Lebanese International University,Yemen,taiz
Position
- Managing Director
November 2007 - April 2020
Publications
Publications (7)
Green analytical methods using Cisapride (CPE) as green analytical reagent was investigated in this work. Rapid, simple, and sensitive spectrophotometric methods for the determination of bromate in water sample, bread and flour additives were developed. The proposed methods based on the oxidative coupling between phenoxazine and Cisapride in the pr...
Two new rapid, accurate, sensitive, reproducible and economical spectrophotometric methods are described for the determination of hexavalent chromium in bulk and in environmental samples like, water and soil using two new electrophilic coupling spectrophotometric reagents, 2-amino-2′,5-dichlorobenzophenone (MCB) and 2-amino-5-chloro-2'-fluorobenzop...
Novel, sensitive and rapid spectrophotometric methods, using phenoxazine (PNZ), 2-chlorophe-noxazine (CPN) and 2-trifluoromethylphenoxazine (TPN) as chromogenic reagents for the determination of residual chlorine are proposed. The methods are based on the reduction of chlorine by an electrophilic coupling reagent, 3-methyl-2-benzothiazoline hydrazo...
Simple, sensitive and rapid spectrophotometric methods were developed for the determination of residual chlorine (RSC) in drinking water and environmental samples using phenoxazine (PNZ), an anticancer drug, as a chromogen and 4-nitro-2-(trifluoromethyl)aniline (NTA) or 2-chloro-4-(trifluoromethyl)aniline (CTA) as new electrophilic coupling reagent...
Phenoxazine (PNZ), 2-chlorophenoxazine (CPN) and 2-trifluoromethylphenoxazine (TPN) were used as new class of spectrophotometric reagents for the determination of nanoamounts of nitrite in presence of cisapride (CSP) and metaclopramide (MCP) as new electrophilic coupling reagents. The methods were based on the oxidation of CSP or MCP by nitrite in...
Nine spectrophotometric methods based on new reactions for the determination of tracer amounts of nitrite in environmental samples were developed. Replacement of toxic reagents was explored to attain the standards of clean chemistry. These methods utilize two classes of compounds namely; phenoxazines and sulphonamides, the well established drugs in...
