2005
DOI: 10.1016/j.jpba.2004.10.024
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Application of two chemometric methods for the determination of imipramine, amitriptyline and perphenazine in content uniformity and drug dissolution studies

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Cited by 28 publications
(21 citation statements)
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“…where b is the regression coefficient of the selected component and g is the standard deviation of the errors in the spectra of the calibration model, while for the ILS model, a value equivalent to 0.001 is used as error (19).…”
Section: Figures Of Meritmentioning
confidence: 99%
“…where b is the regression coefficient of the selected component and g is the standard deviation of the errors in the spectra of the calibration model, while for the ILS model, a value equivalent to 0.001 is used as error (19).…”
Section: Figures Of Meritmentioning
confidence: 99%
“…[10][11][12][13][14][15] Let us consider a mixture containing three compounds X, Y and Z. Under the conditions that the Beer-Lambert's law is valid for all compounds over the whole wavelength range used and if the path length is considered as 1 cm we can write the following (4) where, A m, i represents the absorbance of the mixture at wavelength, i ; X, i , y, i and Z, i denote the absorptivites of the X, Y and Z compounds.…”
Section: Double Divisor-ratio Spectra Proceduresmentioning
confidence: 99%
“…Several spectrophotometric methods, such as derivative spectrophotometry, [1][2][3][4][5] ratio spectra derivative method, 6 ratio spectra derivative-zero crossing method, 7-9 DDRS-DS method [10][11][12][13][14] and double divisor-ratio spectra derivative-zero crossing method 15 have been reported in the literature and applied for ternary and quaternary mixtures. However, it was observed that the derivative spectrophotometry and ratio spectra derivative method provide a good analytical resolution of binary mixtures but these two methods do not give always desirable results for the analysis of ternary and quaternary mixtures.…”
Section: Introductionmentioning
confidence: 99%
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“…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. 8 Além de uma interessante revisão relacionada com o uso de ferramentas de calibração multivariada em análises biomédicas, 9 importantes aplicações na área farmacêutica têm sido recentemente publicadas em revistas nacionais. [10][11][12] Entretanto, poucos trabalhos são encontrados na literatura sobre o desenvolvimento de testes de dissolução de medicamentos por espectroscopia eletrônica associada a ferramentas de calibração multivariada.…”
Section: Introductionunclassified