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	Provedor de dados BJPS (6) Anais da ABC (AABC) (1) Autor Basavaiah,Kanakapura (7) Swamy,Nagaraju (2) Vinay,Kanakapura Basavaiah (2) Abdulrahman,Sameer Abdulaziz Mohammed (1) Devi,Okram Zenita (1) Hiriyanna,Salmara Ganeshbhat (1) Kumar,Urdigere R. Anil (1) Prashanth,Kudige Nagaraj (1) Qarah,Nagib Abdullah Salem (1) Rajedraprasad,Nagaraju (1) Rajendraprasad,Nagaraju (1) Ramakrishna,Veeraiah (1) Ramesh,Pavagada Jagannathamurthy (1) Revanasiddappa,Hosakere Doddarevanna (1) Somashekar,Chikkaswamy (1) Tharpa,Kalsang (1) Mais... Palavra-chave Spectrophotometry (3) Spectrophotometry/quantitative analysis (3) Permanganate (2) Pharmaceuticals (2) Tablets/quantitative analysis (2) Titrimetry/quantitative analysis (2) Albendazole/determination (1) Bromate-bromide (1) Charge-transfer complexes (1) Diethylcarbamazine citrate/determination (1) Dyes (1) N-Bromosuccinimide (1) Ofloxacin/determination (1) Olanzapine/determination (1) Pharmaceutical formulations (1) Pharmaceutical formulations/analysis (1) Pharmaceutical products (1) Simvastatin assay (1) Spectrophotometry/method validation (1) Stavudine determination (1) Mais... Tipo do documento Info:eu-repo/semantics/article (7) Ano 2020 (1) 2015 (1) 2014 (1) 2011 (1) 2010 (1) 2009 (1) 2008 (1) Mais... País Brazil (7) Idioma Inglês (7)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 7 Primeira ... 1 ... Última Sensitive and rapid titrimetric and spectrophotometric methods for the determination of stavudine in pharmaceuticals using bromate-bromide and three dyes Anais da ABC (AABC) Basavaiah,Kanakapura; Ramakrishna,Veeraiah; Somashekar,Chikkaswamy; Kumar,Urdigere R. Anil. Four sensitive and rapid methods for the determination of stavudine (STV) in bulk drug and in dosage forms were developed and optimized. In titrimetry, aqueous solution of STV was treated with a known excess of bromate-bromide in HCl medium followed by estimation of unreacted bromine by iodometric back titration. Spectrophotometric methods involve the addition of a measured excess of bromate-bromide in HCl medium and subsequent estimation of the residual bromine by reacting with a fixed amount of methyl orange, indigocarmine or thymol blue followed by measurement of absorbance at 520 nm (method A), 610 nm (method B) or 550 nm (method C). In all the methods, the amount of bromate reacted corresponds to the amount of STV. Calculations in titrimetry were... Tipo: Info:eu-repo/semantics/article Palavras-chave: Stavudine determination; Titrimetry; Spectrophotometry; Bromate-bromide; Dyes; Pharmaceuticals. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652008000200003 Application of redox reactions for the determination of valganciclovir hydrochloride in pharmaceuticals BJPS Qarah,Nagib Abdullah Salem; Basavaiah,Kanakapura; Abdulrahman,Sameer Abdulaziz Mohammed. Two simple, selective and sensitive spectrophotometric methods were developed and validated for the determination of valganciclovir hydrochloride (VLGH) in pure drug and tablets. The first method was based on the reduction of iron(III) to iron(II) by VLGH and subsequent formation of iron(III)-ferricyanide complex (Prussian blue) in acid medium which was measured at 730 nm (method A). In the second method (method B), permanganate was reduced by VLGH to bluish green manganate in alkaline medium and the absorbance was measured at 610 nm. The absorbance measured in each case was related to VLGH concentration. The experimental conditions were carefully studied and optimized. Beer’s law was obeyed over the concentration ranges of 2.5-20.0 and 2.0-40.0 µg mL-1... Tipo: Info:eu-repo/semantics/article Palavras-chave: Valganciclovir hydrochloride/determination; Spectrophotometry/method validation; Pharmaceutical formulations. Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502020000100516 Titrimetric and spectrophotometric assay of diethylcarbamazine citrate in formulations using iodate and iodide mixture as reagents BJPS Swamy,Nagaraju; Prashanth,Kudige Nagaraj; Basavaiah,Kanakapura. One titrimetric and two spectrophotometric methods are proposed for the determination of diethylcarbamazine citrate (DEC) in bulk drug and in formulations using potassium iodate and potassium iodide as reagent. The methods employ the well-known analytical reaction between iodate and iodide in the presence of acid. In titrimetry (method A), the drug was treated with a measured excess of thiosulfate in the presence of unmeasured excess of iodate-iodide mixture and after a standing time of 10 min, the surplus thiosulfate was determined by back titration with iodine towards starch end point. Titrimetric assay is based on a 1:3 reaction stoichiometry between DEC and iodine and the method is applicable over 2.0-10.0 mg range. The liberated iodine is measured... Tipo: Info:eu-repo/semantics/article Palavras-chave: Diethylcarbamazine citrate/determination; Titrimetry/quantitative analysis; Spectrophotometry/quantitative analysis; Pharmaceutical formulations/analysis. Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502015000100043 Simple and rapid spectrophotometric assay of albendazole in pharmaceuticals using iodine and picric acid as CT complexing agents BJPS Swamy,Nagaraju; Basavaiah,Kanakapura. Two simple, rapid and inexpensive spectrophotometric methods are described for the determination of albendazole (ALB) in bulk drug and in tablets. The methods are based on charge-transfer (CT) complexation reaction involving ALB as n-donor and iodine as σ-acceptor (method A) in dichloromethane or picric acid (PA) as π-acceptor (method B) in chloroform. The absorbance of CT complexes was measured at 380 nm for method A, and 415 nm for method B. The optimization of the experimental conditions is described. Under optimum conditions, Beer's law obeyed over the concentration ranges 8.0-240 and 2.4-42 μg mL-1 for method A and method B, respectively. The apparent molar absorptivity of CT complexes at the respective λmax are calculated to be 1.17×103 and 5.22×103... Tipo: Info:eu-repo/semantics/article Palavras-chave: Albendazole/determination; Spectrophotometry/quantitative analysis; Tablets/quantitative analysis; Charge-transfer complexes. Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502014000400839 Sensitive spectrophotometric assay of simvastatin in pharmaceuticals using permanganate BJPS Tharpa,Kalsang; Basavaiah,Kanakapura; Rajedraprasad,Nagaraju; Vinay,Kanakapura Basavaiah; Hiriyanna,Salmara Ganeshbhat. Two simple, sensitive, selective and inexpensive spectrophotometric methods are described for the determination of simvastatin (SMT) in bulk drug and in tablets using permanganate as the oxidimetric reagent. In method A, SMT is treated with a measured excess of permanganate in acetic acid medium and the unreacted oxidant is measured at 550 nm, whereas in method B the reaction is carried out in alkaline medium and the resulting manganate is measured at 610 nm. In method A, the amount of permanganate reacted corresponds to the SMT content and the absorbance is found to decrease linearly with the concentration; and in method B, the absorbance increases with concentration. The working conditions of assays were optimized, and the methods were validated... Tipo: Info:eu-repo/semantics/article Palavras-chave: Simvastatin assay; Spectrophotometry; Permanganate; Pharmaceutical products. Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502010000100010 Rapid titrimetric and spectrophotometric determination of ofloxacin in pharmaceuticals using N-bromosuccinimide BJPS Vinay,Kanakapura Basavaiah; Revanasiddappa,Hosakere Doddarevanna; Devi,Okram Zenita; Ramesh,Pavagada Jagannathamurthy; Basavaiah,Kanakapura. One titrimetric and two spectrophotometric methods have been described for the determination of ofloxacin (OFX) in bulk drug and in tablets, employing N-Bromosuccinimide as an analytical reagent. The proposed methods involve the addition of a known excess of NBS to OFX in acid medium, followed by determination of unreacted NBS. In titrimetry, the unreacted NBS is determined iodometrically, and in spectrophotometry, unreacted NBS is determined by reacting with a fixed amount of either indigo carmine (Method A) or metanil yellow (Method B). In all the methods, the amount of NBS reacted corresponds to the amount of OFX. Titrimetry allows the determination of 1-8 mg of OFX and the calculations are based on a 1:5 (OFX:NBS) reaction stoichiometry. In... Tipo: Info:eu-repo/semantics/article Palavras-chave: Ofloxacin/determination; Titrimetry/quantitative analysis; Spectrophotometry/quantitative analysis; N-Bromosuccinimide; Tablets/quantitative analysis. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502011000200006 Determination of olanzapine by spectrophotometry using permanganate BJPS Rajendraprasad,Nagaraju; Basavaiah,Kanakapura. Two new spectrophotometric methods using permanganate as the oxidimetric reagent for the determination of olanzapine (OLP) were developed and validated as per the current ICH guidelines. The methods involved the addition of known excess of permanganate to OLP in either acid or alkaline medium followed by the determination of unreacted permanganate at 550 nm (method A) or bluish-green color of manganate at 610 nm (method B). The decrease in absorbance in method A or increase in absorbance in method B as a function of concentration of OLP was measured and related to OLP concentration. Under optimized conditions, Beer's law was obeyed over the ranges 2.0 to 20 and 1.0 to 10 μg mL-1 in method A and method B, respectively. The calculated molar absorptivity... Tipo: Info:eu-repo/semantics/article Palavras-chave: Olanzapine/determination; Spectrophotometry; Permanganate; Pharmaceuticals. Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502009000300020 Registros recuperados: 7 Primeira ... 1 ... Última

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