Alaa El-Sayed Ahmed Ahmed Amin|Publications

Benha University

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Prof. Alaa El-Sayed Ahmed Ahmed Amin :: Publications:

Research Fields

determination

spectrophotometry

pharmaceuticals

pure form

pharmaceutical formulations

spectrophotometric method

colorimetric determination

Number of publications is 187

Title

1-Remarkable Enhancement of Antibacterial Activity of Gentamicin via Loading into Silver Nanoparticles

2-Spectrophotometric determination of iron in environmental and food samples using solid phase extraction.

3-Determination of thallium at ultra-trace levels in water and biological samples using solid phase spectrophotometry.

4-Determination of thallium at ultra-trace levels in water and biological samples using solid phase spectrophotometry.

5-DETERMINATIONS OF RELEVANT IMPURITIES IN COPPER AND SULPHUR COMPOUNDS USED AS PESTICIDES

Abstract' | Full paper

6-Determination of caffeine in roasted and irradiated coffee beans with gamma rays by high performance liquid chromatograph

Abstract' | Full paper

7- NEW, SIMPLE AND VALIDATED SPECTROPHOTOMETRIC METHOD FOR DETERMINATION OF AMIKACIN IN BIOLOGICAL SAMPLES AND ITS PHARMACEUTICAL FORMULATIONS

Abstract' | Full paper

8-UTILITY OF OXIDATION-REDUCTION REACTION FOR THE SPECTROPHOTOMETRIC DETERMINATION OF ANTIVIRAL AND ANTI-PARKINSONIAN DRUG AMANTADINE HCl

Abstract' | Full paper

9-Solid-Phase Extraction Using Polymer-Based Cartridge Modified with 2-(2-benzothiazolylazo)-3-hydroxyphenol for Preconcentration of Uranium (VI) Ions from Water and Real Samples

Abstract' | Full paper

10-Chromium speciation in environmental samples using a solid phase spectrophotometric method.

11-Speciation of selenium in environmental samples by solid phase spectro-photometry using 2,3-dichloro-6-(2,7-dihydroxy-naphthylazo) quinoxaline.

12-Chromium speciation in environmental samples using a solid phase spectrophotometric method.

Abstract' | Full paper

13-Utilization of solid phase spectrophotometry for the determination of trace amounts of copper using 5-(2-benzothiazolylazo)-8-hydroxyquinoline

14-Optimization and validation of spectrophotometric methods for determination of finasteride in dosage and biological forms.

Abstract' | Full paper

15-Cloud-Point Extraction and Spectrophotometric Determination of Trace Quantities of Bismuth in Environmental Water and Biological Samples

16-Spectrophotometric microdetermination of antiparkinsonian and antiviral drug amantadine HCl in pure and in dosage forms.

17- Utility of inorganic oxidants for the spectrophotometric determination of ganciclovir in dosage forms.

18-Spectrophotometric Determination of Cobalt with 5-(2-Benzothiazolylazo)-8-hydroxyquinolene

19-Extractive-spectrophotometric methods for determination of anti-parkinsonian drug in pharmaceutical formulations and in biological samples using sulphonphthalein acid dyes.

20-Spectrophotometric and spectrofluorometric methods for the determination of non-steroidal anti-inflammatory drugs: A review

Abstract' | Full paper

21-Utility of Ion-Pair and Charge Transfer Complexation for Spectrophotometric Determination of Domperidone and Doxycycline in Bulk and Pharmaceutical Formulations.

22-Utilization of sulfophthaleins for the spectrophotometric determination of azithromycin in pure and in dosage forms

23-Study on solid phase extraction and spectrophotometric determination of nickel using 5-(4`-chlorophenylazo)-6-hydroxypyrimidine-2,4-dione in environmental samples

24-Cloud point extraction and spectrophotometric determination of trace quantities of bismuth in environmental water and biological Samples

25-Utility of cloud-point preconcentration and spectrophotometry for determination of trace amounts of palladium(II) and their analytical applications

Abstract' | Full paper

26-Utility of solid phase spectrophotometry to determine trace amounts of zinc in environmental and biological samples.

27-Solid phase extraction using polymer-based C18 cartridge modified with 2-(2-benzothiazolylazo)-3-hydroxyphenol (BTAHP) for preconcentration of uranium(VI) ions from water and real samples.

28-Spectrophotometric microdetermination of anti-Parkinsonian and antiviral drug amantadine HCl in pure and in dosage forms.

29-New SPE sorbent for the rapid and sensitive quantification of aluminium in food, soil extracts and water samples

Abstract' | Full paper

30-Utility of solid phase spectrophotometry for the modified determination of trace amounts of cadmium in food samples.

Abstract' | Full paper

31-Utility of Ion-Pair and Charge Transfer Complexation for Spectrophotometric Determination of Domperidone andDoxycycline in Bulk and Pharmaceutical Formulations

Abstract' | Full paper

32-Indirect spectrophotometric determination of piroxicam and tenoxicam through oxidation with potassium permanganate

33-Spectrophotometric quantification of fluoxetine hydrochloride: Application to quality control and quality assurance processes

34-Complexation and spectophotometric study of samarium(III) using pyrimidine azo derivatives in the presence of cetyltrimethyl ammonium bromide

35-Ion-pairing and reversed phase liquid chromatography for the determination of three different quinolones: enrofloxacin, lomefloxacin and ofloxacin

36-Rapid and sensitive simultaneous determination of hexamidine di-isetionate, chlorhexidine digluconate and chlorocresol in pharmaceutical formulations by high-performance liquid chromatography

37-- Copper(II)–Neocuproine Reagent for Spectrophotometric Determination of Captopril in Pure Form and Pharmaceutical Formulations,

38-Sensitive Spectrophotometric Methods for Determination of Some Organophosphorous Pesticides in Vegetable Samples,

39-Voltammetric Determination of Melatonin in Tablet Dosage Forms and Human Serum

40-Utility of non-Steroidal Anti-inflammatory for Palladium Determination

41-Utility of solid phase extraction for spectrophotometric determination of gold in water, jewel and ore samples.

42-Spectrophotometric microdetermination of some antihypertensive drugs in pure form and in pharmaceutical formulations

43-Synthesis of Schiff Base Unsaturated Oligomeric Polyester for Determination of Trace Lead

Abstract' | Full paper

44-Utility of Extracted Colored Ion – Associate Complexes Formation Reaction for the Determination of Fexofenadine Hydrochloride in Pure Forms and in Dosage Forms

Abstract' | Full paper

45-Colorimetric determination of sildenafil citrate (Viagra) through ion-associate complex formation

Abstract' | Full paper

46- Study on solid phase extraction and spectrophotometric determination of vanadium with 2,3-dichloro-6-(2,7-dihydroxy-1-naphthylazo)quinoxaline

Abstract' | Full paper

47-Utility of oxidation-reduction reaction for the spectrophotometric determination of amlodipine besylate

Abstract' | Full paper

48-Colorimetric assay of cimetidine in the presence of its oxidative degradates

Abstract' | Full paper

49-Spectrophotometric methods for the determination of sertraline hydrochloride and clidinium bromide in bulk and in pharmaceutical preparations.

Abstract' | Full paper

50-Utilization of solid phase spectrophotometry for the determination of trace amounts of copper with 5- (2-benzothiazolylazo)-8-hydroxyquinolene.

51-Three spectrophotometric methods for the determination of oxomemazine hydrochloride in bulk and in pharmaceutical formulations using bromocresol green, congo red, and methyl orange

52-Liquid Chromatographic and Potentiometric Methods for Determinations of Clopidogrel

Abstract' | Full paper

53-- Utility of some pi-acceptors for spectrophotometric determination of gatifloxacin in pure form and in pharmaceutical preparations

54-Colorimetric determination of paracetamol in pure form and in pharmaceutical formulations.

55-- Spectrophotometric determination of some fluoroquinolone derivatives in dosage forms and biological fluids using ion-pair complex formation

56-Comparison of ion-pairing and reversed phase liquid chromatography in determination of sulfamethoxazole and trimethoprim

Abstract' | Full paper

57-Spectrophotometric determination of enrofloxacin, lomefloxacin and ofloxacin in pure and pharmaceutical products through ion-pair complex formation

58-Utility of solid phase spectrophotometry for determination of dissolved iron(II) and iron(III) using 2,3-dichloro-6-(3-carboxy-2-hydroxy-1-naphthylazo) quinoxaline

Abstract' | Full paper

59-Spectrophotometric determination of some fluoroquinolones antibacterial drugs in pure form and in pharmaceuticals formulations

60-Spectrophotometric determination of some anti-tussive drugs and its applications to pharmaceutical formulations

61-Spectrophotometric microdetermination of phenylephrine hydrochloride in pure and in pharmaceutical formulations using haematoxylin.

Abstract' | Full paper

62-Spectrophotometric Determination of pipazethate hydrochloride in pure form and in pharmaceutical formulations.

Abstract' | Full paper

63-The surfactant sensitized analytical reaction of cerium(IV) with some triphenyl formazan derivatives

Abstract' | Full paper

64-Spectrophotometric determination of gatifloxacin in pure form and in pharmaceutical formulation.

Abstract' | Full paper

65-Utilization of ion exchanger and spectrophotometry for assaying amoxicillin and flucloxacillin in dosage form

66-Spectrophotometric determination of pipazethate HCl, dextromethorphan HBr and drotaverine HCl in their pharmaceutical preparations

67-High sensitive and selective spectrophotometric determination of aluminium after collection on a membrane filter using 2,3-dichloro-6-(3-carboxy-2-hydroxy-1-naphthylazo)quinoxaline and zephiramine.

68-Colorimetric microdetermination of captopril in pure form and in pharmaceutical formulations.

69-Spectrophotometric determination of tramadol hydrochloride, ambroxol hydrochloride and clidinium bromide in pharmaceutical formulations.

70-Spectrophotometric determination of aminoglycoside antibiotics based on their oxidation by potassium permanganate.

71-Indirect spectrophotometric determination of gentamicin and vancomycin antibiotics based on their oxidation by potassium permanganate

72-Spectrophotometric determination of dextromethorphan hydrobromide and ketamine hydrochloride in pure and dosage forms.

73-Spectrophotometric determination of benzylamine and chlorphenoxamine hydrochlorides in bulk and pharmaceutical preparations using sulfophthalein dyes.

Abstract' | Full paper

74-Colorimetric determination of certain cephalosporins in pure form and in pharmaceutical formulations

75-Atomic absorption spectroscopic, conductometric and colorimetric methods for determination of fluoroquinolone antibiotics using ammonium reineckate ion pair complex formation

Abstract' | Full paper

76-Spectrophotometric microdetermination of nefopam, mebevrine and phenyl-propanolamine hydrochloride in pharmaceutical formulations using alizarins

Abstract' | Full paper

77-- Synthesis and ion exchange characteristics of poly (acrylamide-acrylic acid)- Silicon titanate and its use for the treatment of industrial wastes.

78-Adaptation of a colour reaction for spectrophotometric determination of diclofenac sodium and piroxicam in pure form and in pharmaceutical formulations

Abstract' | Full paper

79-Spectrophotometric determination of certain cephalosporins in pure form and in pharmaceutical formulations

Abstract' | Full paper

80-Conductometric and indirect atomic absorption spectrometric determination of antimalarials.

81-Utility of oxidation-reduction reaction for the determination of ranitidine hydrochloride in pure form, in dosage forms and in the presence of oxidative degradates.

82-Solid-phase spectrophotometric determination of trace amounts of vanadium using 2,3-dichloro-6-(3-carboxy-2-hydroxynaphthylazo)quinoxaline.

83-Utility of formazans and cetylpyridinium chloride in rapid spectrophotometric determination of zinc in biological materials and pharmaceutival formulations.

84-Conductometric determination of aminoglycoside antibiotics in pure and in pharmaceutical formulations.

85-Spectrophotometric studies and applications for the determination of yttrium in pure and in nickel base alloys

86-Spectrophotometric methods for the determination of anti-emetic drugs in bluk and in pharmaceutical preparations.

87-Simple spectrophotometric method for the quantitative determination of Uranium

Abstract' | Full paper

88-- Synthesis and structural studies of some azobenzene-N-malonic acid derivatives.

89-Colorimetric determination of benzocaine, lignocaine and procaine HCl in pure form and in pharmaceutical formulation using p-benzoquinone

90-Physicochemical studies on the solid complexes of some heavy lanthanide and actinide cations with a prepared hydroxamic acid derivatives

91-Microdetermination of zinc(II) in alloys and ores by visible spectrophotometric technique using 2,3-dichloro-6-(2-hydroxynaphthylazo) quinoxaline in presence of mixed surfactants

92-Charge transfer complexes of some oxazolones with iodine.

93-- Charge transfer complexes of some anilides with nitrobenzene derivatives as p- electron acceptors.

94-Determination of tin(IV) in alloys and in canned food by visible spectrophotometric technique using pyrimidine azo compounds in presence of mixed surfactants.

95-Simple selective spectrophotometric determination of ruthenium after solid phase extraction with some quinoxaline dyes into microcrystalline-p- dichlorobenzene.

96-Facile colorimetric methods for the quantitative determination of tetramisole hydrochloride.

97-A turbidimetric determination of paracetamol in pharmaceutical formulations.

98-Spectrophotometric determination of piroxicam and tenoxicam in pharmaceutical formulations using alizarin.

99-- Utility of alizarine derivatives for the spectrophotometric determination of certain cephalosporines in pure and in dosage forms.

100-Colorimetric determination of b-blockers in pharmaceutical formulations.

101-Spectrophotometric determination of famotidine through oxidation with N-bromosuccinimide and cerric sulphate.

Abstract' | Full paper

102-Spectrophotometric method for the determination of titanium in soil, Geo-chemical, silicates rock and paint samples.

103-Ion-association method for the colorimetric determination of neomycin sulphate in pure and in dosage forms.

104-- Complexation equilibria between antibacterial drugs and tungestate, molybdate and vanadate applied to their determination in pure and dosage forms.

105-Colorimetric procedure for the microdetermination of the antibilharzial drug praziquantel and its applications to pharmaceutical formulations.

106-- Utility of certain p-acceptor for the spectrophotometric determination of sildenafil citrate (Viagra).

Abstract' | Full paper

107-Spectrophotometric estimation of cefuroxime and ceftazidime in bulk and in dosage forms.

108-Synthesis of some thiazolylazo compounds and their applications to the spectrophotometric determination of nickel.

109-- Extractive spectrophotometric determination of nortriptyline hydrochloride using sudan II, IV and black B.

110-Spectrophotometric determination of cadmium using thiazolylazo chromogenic reagents in the presence of Triton X-100: Application in environmental samples.

Abstract' | Full paper

111-Pyrocatechol violet in pharmaceutical analysis. Part I. A spectrophotometric method for the determination of some b-lactam antibiotics in pure and in pharmaceutical dosage forms.

Abstract' | Full paper

112-Utilization of solid phase spectrophotometry for determination of trace amounts of beryllium in natural water.

113-Colorimetric determination of tocopheryl acetate (vitamin E) in pure form and in multi-vitamin capsules.

114-Colorimetric microdetermination of mercury(II) with some quinoxaline azo compounds in presence of an anionic surfactant.

115-Simultaneous spectrophotometric determination of thorium and rare earth metals with pyrimidine azo dyes and cetylpyridinium chloride.

116-Selective spectrophotometric determination of cobalt(II) in synthetic mixtures and pharmaceutical formulates with 5-[o-carboxyphenyl-azo]2,4-dihydroxybenzoic acid.

117-Extraction-colorimetric method for the determination of erythromycin and its esters in dosage forms using chromotropic acid azo dyes

Abstract' | Full paper

118-Determination of nickel in biological samples spectrophotometrically involving complexation reaction with some thiazolylazo compounds.

119-New colorimetric methods for the determination of indapamide and its formulations.

Abstract' | Full paper

120- Utilization of hydrazine hydrochloride in the potentiometric determination of osmium(VIII): Analysis of binary and ternary mixtures.

121-Pyrocatechol violet in pharmaceutical analysis. Part II. A spectrophotometric method for the determination of paracetamol in pure and in pharmaceutical dosage forms.

122-Vanadophosphoric acid as a modified reagent for the spectrophotometric determination of certain cephalosporins and their dosage forms.

123-Spectrophotometric method for the determination of trace amounts of mercury: Application to environmental and biological samples

124-- Colorimetric determination of microamounts of scandium with 2,3 dichloro -6-(3-carboxy -2-hydroxy -1-naphthylazo)quinoxaline and cetyltrimethyl-ammonium bromide.

125-Utilization of colorimetric and atomic absorption spectrometric determination of aztreonam through ion pair complex formation.

126-- Colorimetric estimation of melatonin in pharmaceutical formulations

127-Quantitation of some recently introduced antibacterial drugs using sudan III as chromogenic reagent.

128-Spectrophotometric microdetermination of some pharmaceutically important aminoquinoline antimalarials, as ion-pair complexes.

129-Sensitive spectrophotometric determination of microamounts of paracetamol using an indirect redox technique.

130-The surfactant –sensitized analytical reaction of niobium with some thiazolylazo compounds.

131-- Colorimetric determination of microamounts of scandium with 2,3 dichloro -6-(3-carboxy -2-hydroxy -1-naphthylazo)quinoxaline and cetyltrimethyl-ammonium bromide.

132-Selective and rapid spectrophotometric determination of mangenese using o-hydroxy acetophenon isobutyroyl hydrazone and its application in synthetic mixture of steel alloy.

133-Spectrophotometric analysis for microdetermination of egyptian gold alloys constituents using some azo compounds.

134-Utility of azures A and B for the colorimetric determination atenolol and captoprile.

135-Extractive spectrophotometric determination of some skeletal muscle relaxant drugs through ion-pair formation with molybdenum(V) and thiocyanate.

136-New colorimetric method for microdetermination of melatonin in pure and in dosage forms.

137-Determination of molybdenum in human urine by spectrophotometric method using thiazolylazo compounds as chromogenic reagents

138-Utility of the ion-pair formation for the spectrophotometic determination of terfenadine in pure form and in pharmaceutical formulations

139-Spectrophotometric determination of ephedrine hydrochloride and chlorphenramine maleate using carmosine.

140-Microdetermination of La(III), Y(III), Sc(III), Th(IV) and UO2(II) ions by complexation with some arsenazo compounds. Egypt J. Anal. Chem., 7, 37-44 .

141-Utilization of some acidic dyes for the determination of tizanidine hydrochloride, pancuronium bromide and orphenadrine citrate

142-Spectrophotometric studies of 4-(2-hydroxy-4- substituted azobenzene)-2-methyl quinoline as recent reagents for determination of silver.

143-Extraction-spectrophotometric method for the determination of betamethazone in pure and in pharmaceutical formulations.

144-Utility of tetrazolium blue for the colorimetric assay of tannins in tea.

145-Characterization of a novel tellurite selective electrode.

146-A rapid, selective spectrophotometric method for the determination of Ce(III) using some bisazophenyl-b-diketone derivatives.

147-Colorimetric determination of ampicilline and 6-aminopenicillenic acid using acenaphthenequinone as a chromophoric reagent.

Abstract' | Full paper

148-Quantitative determination of some pharmaceutical veterinary formulations using bromocresol purple and bromocresol green.

149-Polarographic and spectrophotometric determination of La(III), Sm(III), Eu(III), and Gd(III) complexes with some derivatives of aryl Schiff base., Electrochem., 12, 544-548 .

150-Spectrophotometric determination of platinum using some azo dyes as chromogenic reagents.

151-Acetylaceton-formaldehyde reagent for the spectrophotometric determination of some sulfa drugs in pure and dosage forms.

Abstract' | Full paper

152-Spectrophotometric Assay of cephalosporins in pharmaceutical products using chromotrope 2B and chromotrope 2 R.

153-Selective spectrophotometric method for the determination of erythromycin and its esters in pharmaceutical formulations using gentiana violet.

154-Colorimetric microdetrmination of some corticosteroids drugs using indophenol as chromophoric reagent.

155-Modified spectrophotometric method for the determination of some important antibiotics through charge-transfer complexatioin reaction with chloranil.

Abstract' | Full paper

156-Analytical application of atomic absorption spectrometry for the determination of chlorphenramine maleate and chlorphenoxamine HCl in pure form and in pharmaceutical preparations.

157-Xylenol orange as a new reagent for the colorimetric determination of selenium and tellurium.

Abstract' | Full paper

158-Preparatioin and characterization of codaine-responsive electrode.

159-Application of alizarine derivatives as chromogenic reagents for the spectrophotometric determination of some sulfa drugs.

160-Spectrophotometric determination of 6-aminopenicillanic acid using bromophenol blue and bromothymol blue.

Abstract' | Full paper

161-Spectrophotometric determination of scandium (III) using aurintricarboxylic acid as indicator.

162-New polycrystalline solid state responsive electrodes for the determination of the selenite ion.

163-Hydrometallurgical treetment of Egyption Zinc-Lead oxide Ore. 49, 1-12 .

164-Utility of certain p-acceptors for the spectrophotometric determination of norfloxacin.

165-Conductometric titration of pindolol and propranolol using ammonium reineckate and potassium tetracyanonickelate.

166-Selective and quantitative determination of cobalt using some arsenazo compounds.

167-Spectrophotometric determination of cobalt and nickel using 3-methyl-6-hydroxy-2`-nitroazaobenzene.

168-Colorimetric method for the simultaneous determination of chlorphenoxamine hydrochloride and anhydrous caffeine in pure and dosage forms with rose bengal.

169-Utilization of ammonium reineckate, potassium tetracyanonickelate and sodium cobaltinitrite in the conductometric determination of benzocaine, procaine and lignocaine. Chin. Pharm. J., 47, 147-156 .

170-Synthesis and Efficiency of 5-(2-hydroxyphenylazo)-indazoles as new reagents for the determination of vanadium.

171-Spectrophotometric and conductometric determination of clindamycin hydrochloride in pure form and in pharmaceutical preparations.

172-Charge-transfer complexes of oxazolones with nitrobenzene p- acceptors.

173-Spectrophotometric microdetermination of ampicillin and cloxacillin in pure form, Mixtures and pharmaceutical preparations using bromothymol blue.

174-Simultaneous dissolution of Egyptian ores under the application of potential. Inter. J. Chem., 78, 123-134.

175-Spectrophotometric determination of zinc in pharmaceutical samples with some salicylic azo compounds.

Abstract' | Full paper

176-Spectrophotometric determination of zinc (II) using oxazolone derivatives and its application to alloy. AMSE, 42, 59-64 .

177-Spectrophotometric studies on V(V), Mn (II), Fe (III), Ni (II), Cu (II) and Zn (II) chelates with some arsenilic acid azo dyes. Third confedence on chemistry and its role in Development, Proc. CCRD’94, Fac. Sci., Man. Univ., .

178-Colorimetric determination of amoxycillin in pure form and in pharmaceutical preparations.

179-Spectrophotometric microdetermination of sulfamethoxazole and trimethoprim using alizarin and quinalizarin.

Abstract' | Full paper

180-Spectrophotometric microdetermination of ampicillin and amoxycillin with picramic acids. Microchem. J., 50, 6-13 .

181-The reaction of Sc3+, Y3+ and La3+ with thiazol yellow G and the spectrophotometric determination of Y3+ ions in nickel-base alloys in the presence of cerium sub-group rare earths.A.S. AMSE, 45, 59-63 .

182- DC-Polarographic determination of ampicillin in pharmaceutical dosage forms.

183-2,3-Dichloro-6-(3-carboxy-2-hydroxynaphthylazo)quinoxaline as an analytical reagent for spectrophotometric determination of microamount of gold.

184-Metal chelates of some arsenazo compounds with scandium (III), Yttrium (III), Lanthanum (III), Thorium (IV) and Uranyl (II) ions. Egypt. J. Anal. Chem., 2, 41-52 .

185-Determination of amoxycillin and flucloxacillin in mixtures and pharmaceutical preparations using 3, 5-dinitrobenzoic acid. Quim. Anal., 89, 726-729 .

186-Spectrophotometric determination of ampicillin with some nitro compounds.

187-Spectrophotometric microdetermination of Copper (II), Silver (I) and Gold (III) using azastyrene Schiff bases. Microchem. J, 44, 311-317 .

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