2004
DOI: 10.1016/j.aca.2004.02.018
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Determination of Cinchona alkaloids and Vitamin B6 by high-performance liquid chromatography with fluorescence detection

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Cited by 40 publications
(27 citation statements)
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“…14,15 Fluorimetry provides low detection limits and wide linear dynamic range, but its application is restricted because the analyte must be fluorescent or a fluorescent derivate must be produced. 16 Complex matrixes can be analyzed by high performance liquid chromatography (HPLC) 17 in normal phase 18 or based on ion-pair formation, 19 considering the ionic nature of quinine. But this makes difficult the determination because the equilibrium between mobile and stationary phases is slow and the separation is susceptible to variations of temperature, pH and concentration of organic compounds in the mobile-phase.…”
Section: Introductionmentioning
confidence: 99%
“…14,15 Fluorimetry provides low detection limits and wide linear dynamic range, but its application is restricted because the analyte must be fluorescent or a fluorescent derivate must be produced. 16 Complex matrixes can be analyzed by high performance liquid chromatography (HPLC) 17 in normal phase 18 or based on ion-pair formation, 19 considering the ionic nature of quinine. But this makes difficult the determination because the equilibrium between mobile and stationary phases is slow and the separation is susceptible to variations of temperature, pH and concentration of organic compounds in the mobile-phase.…”
Section: Introductionmentioning
confidence: 99%
“…1) Some methods have been described for the determination of quinine and quinidine. These include: HPLC with fluorescence detection, 2) stereoselective non aqueous capillary electrophoresis, 3) TLC and HPTLC with densitometric evaluation, 4) liquid chromatography with diode-laser polarimetric detection, 5) fluorescence life-time determination based on modulation measurements by ion-pair diastereomeric complexation 6) and circular dichroism. 7) First derivative spectrophotometry has been applied to the determination of the sum of quinine and quinidine.…”
mentioning
confidence: 99%
“…A quinina, isolada ou em associações farmacêuticas, tem se re-estabelecido como medicamento anti-malarial a partir da década de 60, com o surgimento de resistência do P. falciparum à cloroquina (Gatti et al, 2004). A quinina foi o primeiro medicamento utilizado para o tratamento da malária; a principal fonte do composto é Viviane do Nascimento Introdução 2 a casca da espécie Cinchona.…”
Section: Introductionunclassified
“…A quinina também é usada como aromatizador amargo em bebidas e em muitos alimentos, antidiarréico, bem como em comprimidos de paracetamol, como um antipirético (McCalley, 2002;Tsimachidis et al, 2008). A quinina tem também efeito relaxante muscular (Tsimachidis et al, 2008), sendo utilizada para este fim em pessoas que sofrem de cãibra noturna, que corresponde a uma condição dolorosa que afeta principalmente idosos.A quinidina, um diastereoisômero da quinina, é usada como droga Os estereoisômeros, cinchonina e cinchonidina, não são usados como medicamentos, embora mostrem efeitos similares àqueles da quinina e da quinidina (Gatti et al, 2004). A quinidina, a cinchonina e a cinchonidina têm também propriedade antimalarial, mas estes alcalóides não são tão eficazes quanto a quinina.…”
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