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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Chromatographic profiles of Phyllanthus aqueous extracts samples: a proposition of classification using chemometric models

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Author(s):
Rocha Martins, Lucia Regina [1, 2] ; Pereira-Filho, Edenir Rodrigues [1] ; Cass, Quezia Bezerra [1]
Total Authors: 3
Affiliation:
[1] Univ Fed Sao Carlos, Dept Chem, BR-13565905 Sao Carlos, SP - Brazil
[2] Technol Fed Univ Paran, Acad Dept Chem & Biol, BR-80230901 Curitiba, Parana - Brazil
Total Affiliations: 2
Document type: Journal article
Source: ANALYTICAL AND BIOANALYTICAL CHEMISTRY; v. 400, n. 2, p. 469-481, APR 2011.
Web of Science Citations: 19
Abstract

Taking in consideration the global analysis of complex samples, proposed by the metabolomic approach, the chromatographic fingerprint encompasses an attractive chemical characterization of herbal medicines. Thus, it can be used as a tool in quality control analysis of phytomedicines. The generated multivariate data are better evaluated by chemometric analyses, and they can be modeled by classification methods. ``Stone breaker{''} is a popular Brazilian plant of Phyllanthus genus, used worldwide to treat renal calculus, hepatitis, and many other diseases. In this study, gradient elution at reversed-phase conditions with detection at ultraviolet region were used to obtain chemical profiles (fingerprints) of botanically identified samples of six Phyllanthus species. The obtained chromatograms, at 275 nm, were organized in data matrices, and the time shifts of peaks were adjusted using the Correlation Optimized Warping algorithm. Principal Component Analyses were performed to evaluate similarities among cultivated and uncultivated samples and the discrimination among the species and, after that, the samples were used to compose three classification models using Soft Independent Modeling of Class analogy, K-Nearest Neighbor, and Partial Least Squares for Discriminant Analysis. The ability of classification models were discussed after their successful application for authenticity evaluation of 25 commercial samples of ``stone breaker.{''} (AU)

FAPESP's process: 05/01721-7 - Chemical characterization by chromatography and spectroscopy methods for quality control of raw materials and pharmaceutical forms of "quebra-pedra"
Grantee:Lucia Regina Rocha Martins
Support Opportunities: Scholarships in Brazil - Doctorate