Simultaneous quantification of caffeine and chlorogenic acid in coffee green beans and varietal classification of the samples by HPLC-DAD coupled with chemometrics

AbstractThe color of Oriental tobaccos was organoleptically assayed, and high performance liquid chromatography (HPLC) of polyphenols was performed. The major tobacco polyphenols (chlorogenic acid, its isomers, and rutin), as well as scopoletin and kaempferol-3-rutinoside were quantified. HPLC polyphenol profiles were processed by pattern recognition method (PRM), and the values of indexes of similarity (Is,%) between the cultivars studied were determined. It was shown that data from organoleptic color assessment and from PRM based on HPLC profiles of polyphenols of the cultivars studied are largely compatible. Hence, PRM can be suggested as an additional tool for objective color evaluation and classification of Oriental tobacco.

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Varietal Classification of Young Red Wines in Terms of Chemical and Colour Parameters

Journal of the Science of Food and Agriculture ◽

10.1002/(sici)1097-0010(199602)70:2<173::aid-jsfa479>3.0.co;2-j ◽

1996 ◽

Vol 70 (2) ◽

pp. 173-180 ◽

Cited By ~ 24

Author(s):

Luis Almela ◽

Sebastián Javaloy ◽

José A. Fernández-López ◽

José M. López-Roca

Keyword(s):

Red Wines ◽

Varietal Classification ◽

Colour Parameters

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Application of image texture analysis for varietal classification of barley

International Agrophysics ◽

10.2478/v10247-012-0012-z ◽

2012 ◽

Vol 26 (1) ◽

pp. 81-90 ◽

Cited By ~ 8

Author(s):

P. Zapotoczny

Keyword(s):

Discriminant Analysis ◽

Texture Analysis ◽

Classification Accuracy ◽

Image Texture ◽

Image Texture Analysis ◽

Texture Parameters ◽

Varietal Classification ◽

Variable Reduction ◽

Barley Kernel

Application of image texture analysis for varietal classification of barleyThis paper presents the results of a study into the use of the texture parameters of barley kernel images in varietal classification. A total of more than 270 textures have been calculated from the surface of single kernels and bulk grain. The measurements were performed in four channels from a 24 bit image. The results were processed statistically by variable reduction and general discriminant analysis. Classification accuracy was more than 99%.

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The Varietal Classification of Hops Products by Chemometrics Method

Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca Agriculture ◽

10.15835/buasvmcn-agr:5113 ◽

2010 ◽

Vol 67 (2) ◽

Author(s):

Elena MUDURA ◽

Dorina BRATFALEAN ◽

Maria TOFANA ◽

Sonia SOCACI ◽

Adriana PAUCEAN ◽

...

Keyword(s):

Cluster Analysis ◽

Brewing Industry ◽

Chemical Parameters ◽

Chemometric Method ◽

Varietal Classification ◽

European Regulations ◽

Chemical Description

The varietal clasification of hop products according with Romanian and European regulations is done in several groups according with their use in the brewing industry as aroma and bitter hops. The clasification is done according with some chemical parameters, but these do not garantee that the product is a pure variety or is a blanding. Using chemometric method as cluster analysis, clasification according with chemical description of hop products the clasification can be predicted more precisely.

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