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Master's Dissertation
DOI
https://doi.org/10.11606/D.60.2014.tde-09042014-084231
Document
Author
Full name
Erick Vicente da Silva Motta
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
Ribeirão Preto, 2014
Supervisor
Committee
Bastos, Jairo Kenupp (President)
Cavalheiro, Alberto Jose
Paschoal, Jonas Augusto Rizzato
Title in Portuguese
Desenvolvimento e validação de método analítico por CLAE-UV-DAD para quantificação e análise sazonal de derivados galoilquínicos nas folhas de Copaifera langsdorffii
Keywords in Portuguese
CLAE-UV-DAD
Copaifera langsdorffii
galoilquínico
sazonalidade.
Abstract in Portuguese
Copaifera langsdorffii (Fabaceae, Caesalpinioideae), conhecida popularmente como "copaíba", "copaibeira" ou "pau d'óleo", é uma árvore de grande porte que se encontra amplamente distribuída pelo Brasil, desde a floresta amazônica até a vegetação do cerrado. A oleorresina, constituída principalmente por sesquiterpenos e diterpenos, é utilizada na medicina popular no tratamento de desordens infecciosas e inflamatórias. Por outro lado, estudos sobre suas folhas, as quais são constituídas majoritariamente por flavonoides e derivados galoilquínicos, são escassos. Assim, foi proposto o isolamento de marcadores químicos, desenvolvimento e validação de método analítico por CLAE-UV-DAD, bem como o estudo sazonal. O extrato bruto obtido das folhas foi particionado com solventes de polaridade crescente: diclorometano, acetato de etila e n-butanol. As frações em n-butanol e aquosa apresentaram, majoritariamente, compostos polares, dentre os quais se destacaram os derivados galoilquínicos. Para isolamento desses compostos utilizaram-se a cromatografia de permeação em gel de Sephadex LH-20 e a cromatografia líquida de alta eficiência preparativa. Nas análises por CLAE-UV-DAD empregou-se coluna analítica Synergi Polar-RP (100 mm x 3,0 mm, 2,5 ?m) e fase móvel composta por ácido fórmico-água (0,1:99,9, solvente A) e isopropanol- metanol-acetonitrila (0,5:4:6, solvente B). O gradiente de eluição foi A:B (90:10 para 85:15) em 8,33 minutos, seguido por A:B (85:15 para 64:36) até 29,17 minutos, utilizando vazão de 0,68 mL/min. Os estudos de sazonalidade foram realizados com 10 acessos de C. langsdorffii cultivados no Sítio Beija-Flor (Cajuru/SP). A partir da fração aquosa foram isolados e identificados 16 derivados galoilquínicos: ácido 5'-O-metil-3-Ogaloilquínico (AGQ-1), ácido 5''-O-metil-3,4-di-O-galoilquínico (AGQ-2), ácido 5',5''-di-Ometil- 3,4-di-O-galoilquínico (AGQ-3), ácido 3,4-di-O-galoilquínico (AGQ-4), ácido 5''-Ometil- 3,5-di-O-galoilquínico (AGQ-5), ácido 5'-O-metil-3,5-di-O-galoilquínico (AGQ-6), ácido 5'-O-metil-3,4-di-O-galoilquínico (AGQ-7), ácido 5',5''-di-O-metil-3,5-di-Ogaloilquínico (AGQ-8), ácido 5',5''-di-O-metil-4,5-di-O-galoilquínico (AGQ-9), ácido 3,5-di- O-galoilquínico (AGQ-10), ácido 4,5-di-O-galoilquínico (AGQ-11), ácido 5'-O-metil-4,5-di- O-galoilquínico (AGQ-12), ácido 5''-O-metil-4,5-di-O-galoilquínico (AGQ-13), ácido 3,4,5- tri-O-galoilquínico (AGQ-14), ácido 5''-O-metil-3,4,5-tri-O-galoilquínico (AGQ-15), ácido 5',5'',5'''-tri-O-metil-3,4,5-tri-O-galoilquínico (AGQ-16). Além disso, por meio das análises realizadas por CLAE-EM foi possível constatar a presença de outros 10 derivados galoilquínicos: ácido 3-O-galoilquínico, ácido 4-O-galoilquínico, ácido 5-O-galoilquínico, ácido 5'-O-metil-4-O-galoilquínico, ácido 5'-O-metil-5-O-galoilquínico, ácido 5'-O-metil- 3,4,5-tri-O-galoilquínico, ácido 5'''-O-metil-3,4,5-tri-O-galoilquínico, ácido 5',5''-di-Ometil- 3,4,5-tri-O-galoilquínico, ácido 5',5'''-di-O-metil-3,4,5-tri-O-galoilquínico, ácido 5'',5'''-di-O-metil-3,4,5-tri-O-galoilquínico. O método analítico mostrou-se adequado para quantificação de nove derivados galoilquínicos (AGQ-1, AGQ-5, AGQ-6, AGQ-7, AGQ-8, AGQ-9, AGQ-10, AGQ-15, AGQ-16) e dois flavonoides, quercitrina e afzelina, frente aos parâmetros seletividade, linearidade, sensibilidade, precisão e exatidão. Por meio de análise estatística multivariada dos estudos sazonais concluiu-se que os acessos apresentaram perfis químicos qualitativos e quantitativos semelhantes nas coletas isoladas e perfis quantitativos diferentes ao longo dos meses.
Title in English
Development and validation of analytical method by HPLC-UV-DAD for quantification and seasonal studies of galloylquinic compounds from Copaifera langsdorffii leaves.
Keywords in English
Copaifera langsdorffii
galloylquinic
HPLC-UV-DAD
seasonality
Abstract in English
Copaifera langsdorffii (Fabaceae, Caesalpinioideae), popularly known as "copaíba", "copaibeira" or "pau d'oleo", is a large tree widely distributed in Brazil, from Amazon rainforest to savannah vegetation. Its oleoresin, composed mainly of sesquiterpenes and diterpenes, is widely used in folk medicine to treat inflammatory and infectious disorders. On the other hand, studies about its leaves, composed mainly of flavonoids and galloylquinic acid derivatives, are scarce. Therefore, it was proposed to isolate leaves major compounds, to develop and validate an analytical method by HPLC-UV-DAD, as well as to udertake seasonal studies. The crude extract of the leaves was partitioned with solvents of increasing polarity: dichloromethane, ethyl acetate and n-buthanol, in sequence. Chemical profiles of n-buthanol and aqueous fractions showed to be composed of polar compounds, especially galloylquinic acid derivatives. These compounds were isolated by gel permeation chromatography using Sephadex LH-20 and preparative high-performance liquid chromatography. The HPLC-UV-DAD analyses were carried out on a Synergi Polar-RP (100 x 3.0 mm, 2.5 ?m) column. The mobile phase was made up of formic acid-water (0.1:99.9, solvent A), and isopropanol-methanol-acetonitrile (0.5:4:6, solvent B). The elution gradient was A:B (90:10 to 85:15) in 8.33 minutes, followed by A:B (85:15 to 64:36) up to 29.17 minutes using a flow rate of 0.68 mL/ min. The seasonal studies were performed from 10 C. langsdorffii accesses grown on Beija-Flor farm (Cajuru/SP). From the aqueous fraction it was isolated and identified 16 galloylquinic acid derivatives: 5'-O-methyl-3-Ogalloylquinic acid (GQA-1), 5''-O-methyl-3,4-di-O-galloylquinic acid (GQA-2), 5',5''-di-Omethyl- 3,4-di-O-galloylquinic acid (GQA-3), 3,4-di-O-galloylquinic acid (GQA-4), 5''-Omethyl- 3,5-di-O-galloylquinic acid (AGQ-5), 5'-O-methyl-3,5-di-O-galloylquinic acid (GQA-6), 5'-O-methyl-3,4-di-O-galloylquinic acid (AGQ-7), 5',5''-di-O-methyl-3,5-di-Ogalloylquinic acid (GQA-8), 5',5''-di-O-methyl-4,5-di-O-galloylquinic acid (GQA-9), 3,5-di- O-galloylquinic acid (GQA-10), 4,5-di-O-galloylquinic acid (GQA-11), 5'-O-methyl-4,5-di- O-galloylquinic acid (GQA-12), 5''-O-methyl-4,5-di-O-galloylquinic acid (GQA-13), 3,4,5- tri-O-galloylquinic acid (GQA-14), 5''-O-methyl-3,4,5-tri-O-galloylquinic acid (GQA-15), 5',5'',5'''-tri-O-methyl-3,4,5-tri-O-galloylquinic acid (GQA-16). Furthermore, through HPLC-MS analysis it was identified additional 10 galloylquinic acid derivatives: 3-Ogalloylquinic acid, 4-O-galloylquinic acid, 5-O-galloylquinic acid, 5'-O-methyl-4-Ogalloylquinic acid, 5'-O-methyl-5-O-galloylquinic acid, 5'-O-methyl-3,4,5-tri-Ogalloylquinic acid, 5'''-O-methyl-3,4,5-tri-O-galloylquinic acid, 5',5''-di-O-methyl-3,4,5-tri- O-galloylquinic acid, 5',5'''-di-O-methyl-3,4,5-tri-O-galloylquinic acid, 5'',5'''-di-O-methyl- 3,4,5-tri-O- galloylquinic acid. The HPLC developed method was suitable to quantify nine galloylquinic derivatives (GQA-1, GQA-5, GQA-6, GQA-7, GQA-8, GQA-9, GQA-10, GQA-15, GQA-16) and two flavonoids, quercitrin and afzelin, related to the selectivity, linearity, sensitivity, precision and accuracy parameters. Through multivariate statistical analysis, it was possible to conclude that all ten diferrent populations of C. langsdorffii cultivated displayed similar qualitative and quantitative chemical profiles among isolated months and different quantitative profiles among different months.
 
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Publishing Date
2014-04-11
 
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