2010
DOI: 10.1590/s0100-40422010000200026
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Losartan potassium dissolution test for drug release evaluation in pharmaceutical capsules using HPLC and UV spectrophotometry

Abstract: Recebido em 15/4/09; aceito em 27/7/09; publicado na web em 11/1/10This work describes the development and validation of a dissolution test for 50 mg losartan potassium capsules using HPLC and UV spectrophotometry. A 2 4 full factorial design was carried out to optimize dissolution conditions and potassium phosphate buffer, pH 6.8 as dissolution medium, basket as apparatus at the stirring speed of 50 rpm and time of 30 min were considered adequate. Both dissolution procedure and analytical methods were validat… Show more

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Cited by 19 publications
(15 citation statements)
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“…To establish the sink condition, we did not carry out the experiment directly, but in some reports (Bonfilio et al, 2010) have stated that the drug does not possess sufficient solubility in 0.1 N hydrochloric acid, whereas, it shows satisfactory solubility in phosphate buffer. In some reports (Bonfilio et al, 2010), it has been stated that the use of water as a dissolution medium is discouraged because test condition such as pH and surface tension can vary depending on water source, and may change during the dissolution test itself.…”
Section: Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“…To establish the sink condition, we did not carry out the experiment directly, but in some reports (Bonfilio et al, 2010) have stated that the drug does not possess sufficient solubility in 0.1 N hydrochloric acid, whereas, it shows satisfactory solubility in phosphate buffer. In some reports (Bonfilio et al, 2010), it has been stated that the use of water as a dissolution medium is discouraged because test condition such as pH and surface tension can vary depending on water source, and may change during the dissolution test itself.…”
Section: Resultsmentioning
confidence: 99%
“…In some reports (Bonfilio et al, 2010), it has been stated that the use of water as a dissolution medium is discouraged because test condition such as pH and surface tension can vary depending on water source, and may change during the dissolution test itself. For this reason, the phosphate buffer pH 6.8 was chosen as dissolution medium.…”
Section: Resultsmentioning
confidence: 99%
“…The capsules should meet the demands of weight variation, disintegration time, assay and tenor uniformity of actives described in the monograph. 12,13 Therefore, the aim of this study was to develop capsules starting from hard gelatin and HPMC involucres, to evaluate the quality of the final products and to compare them with each other and with the medicine reference.…”
Section: Introductionmentioning
confidence: 99%
“…[2][3][4] Por sua vez, métodos fundamentados em espectroscopia eletrônica são relatados com menor frequência, usualmente envolvendo a avaliação de medicamentos que contêm apenas um fármaco. 5,6 Para misturas mais complexas, os problemas de interferência espectral costumam inviabilizar o uso de sistemas convencionais de calibração, o que praticamente exige o uso de sistemas de calibração fundamentados em espectrofotometria derivativa 7 ou calibração multivariada.…”
Section: Introductionunclassified