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Wyświetlanie 1-2 z 2
Tytuł:
Development and validation of spectrophotometric methods for the quantification of solifenacin succinate: application to tablet dosage forms
Autorzy:
Seshamamba, B. S. V.
Satyanarayana, P. V. V.
Sekaran, Ch. B.
Powiązania:
https://bibliotekanauki.pl/articles/412347.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Solifenacin succinate
potassium permanganate
copper sulphate
ammonium molybdate
bromocresol green
Opis:
Four sensitive, precise and accurate spectrophotometric methods for the estimationof solifenacin succinate(SFS) have been developed. Method Adescribes the interaction of SFSwith potassium permanganate in alkaline mediumto give green colored manganate ionwith absorption maxima at 610nm. Methods Band Care based on the formation of ternary complexes of SFSwith, copper (II)/eosin(method B)and ammonium molybdate/ammonium thiocyanate(method C),respectivelywhich are extracted into chloroform and have absorption maxima at 545nm (method B) and 465nm (method C). Method D was based on the formation of yellowcolored ion-pair complex between bromocresol green and SFS in dichloromethane medium with absorption maxima at 415nm.Regression analysis of Beer's law plot showed good correlation in the concentration range of 5-50, 2.5-50, 10-100 and 2-20 μg/mLfor methods A, B, Cand D, respectively. Different variables affecting the reaction were studied and optimized. The proposed methods were applied successfully for the analysis of SFSin tablets dosage forms. No interference was observed from common pharmaceutical excipients.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2013, 10, 2; 167-182
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New spectrophotometric methods for the determination of nifedipine in pharmaceutical formulations
Autorzy:
Rahman, Nafisur
Azmi, Syed
Powiązania:
https://bibliotekanauki.pl/articles/1041343.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
pharmaceutical formulations
spectrophotometry
potassium hydroxide
validation
nifedipine
ammonium molybdate
Opis:
Two simple, sensitive and economical spectrophotometric methods were developed for the determination of nifedipine in pharmaceutical formulations. Method A is based on the reaction of the nitro group of the drug with potassium hydroxide in dimethyl sulphoxide (DMSO) medium to form a coloured product, which absorbs maximally at 430 nm. Method B uses oxidation of the drug with ammonium molybdate and subsequently reduced molybdenum blue is measured at 830 nm. Beer's law is obeyed in the concentration range of 5.0-50.0 and 2.5-45.0 µg ml-1 with methods A and B, respectively. Both methods have been successfully applied for the assay of the drug in pharmaceutical formulations. No interference was observed from common pharmaceutical adjuvants. The reliability and the performance of the proposed methods are established by point and interval hypothesis tests and through recovery studies.
Źródło:
Acta Biochimica Polonica; 2005, 52, 4; 915-922
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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