Cluster analysis of commercial samples of Bauhinia spp. using HPLC‐UV/PDA and MCR‐ALS/PCA without peak alignment procedure. Issue 5 (5th June 2015)

• Record Type: Journal Article
• Authors: Ardila, Jorge Armando; Funari, Cristiano Soleo; Andrade, André Marques; Cavalheiro, Alberto José; Carneiro, Renato Lajarim
• Is Part Of: Phytochemical analysis. Volume 26:Issue 5(2015:Sep.)
• Page Start: 367
• Page End: 373
• Publication Date: 2015-06-05
• Subjects: Plants -- Analysis -- Periodicals; Plants -- chemistry -- Periodicals; 572.2
• DOI: 10.1002/pca.2571
• Languages: English
• ISSNs: 0958-0344

Abstract

<abstract abstract-type="main"> <title>Abstract</title> <sec id="pca2571-sec-0001" sec-type="section"> <title>Introduction</title> <p> <italic>Bauhinia forficata</italic> Link. is recognised by the Brazilian Health Ministry as a treatment of hypoglycemia and diabetes. Analytical methods are useful to assess the plant identity due the similarities found in plants from <italic>Bauhinia</italic> spp. HPLC‐UV/PDA in combination with chemometric tools is an alternative widely used and suitable for authentication of plant material, however, the shifts of retention times for similar compounds in different samples is a problem.</p> </sec> <sec id="pca2571-sec-0002" sec-type="section"> <title>Objective</title> <p>To perform comparisons between the authentic medicinal plant (<italic>Bauhinia forficata</italic> Link.) and samples commercially available in drugstores claiming to be "<italic>Bauhinia</italic> spp. to treat diabetes" and to evaluate the performance of multivariate curve resolution – alternating least squares (MCR‐ALS) associated to principal component analysis (PCA) when compared to pure PCA.</p> </sec> <sec id="pca2571-sec-0003" sec-type="section"> <title>Methodology</title> <p>HPLC‐UV/PDA data obtained from extracts of leaves were evaluated employing a combination of MCR‐ALS and PCA, which allowed the use of the full chromatographic and spectrometric information without the need of peak alignment procedures.</p> </sec> <sec id="pca2571-sec-0004" sec-type="section"> <title>Results</title> <p>The use of MCR‐ALS/PCA showed better results than the conventional PCA using only one wavelength. Only two of nine commercial samples presented characteristics similar to the authentic <italic>Bauhinia forficata</italic> spp., considering the full HPLC‐UV/PDA data.</p> </sec> <sec id="pca2571-sec-0005" sec-type="section"> <title>Conclusion</title> <p>The combination of MCR‐ALS and PCA is very useful when applied to a group of samples where a general alignment procedure could not be applied due to the different chromatographic profiles. This work also demonstrates the need of more strict control from the health authorities regarding herbal products available on the market. Copyright © 2015 John Wiley & Sons, Ltd.</p> </sec> </abstract>