Simultaneous analysis of main catechins contents in green tea (Camellia sinensis (L.)) by Fourier transform near infrared reflectance (FT-NIR) spectroscopy

Abstract This paper reported the results of simultaneous analysis of main catechins (i.e., EGC, EC, EGCG and ECG) contents in green tea by the Fourier transform near infrared reflectance (FT-NIR) spectroscopy and the multivariate calibration. Partial least squares (PLS) algorithm was conducted on the calibration of regression model. The number of PLS factors and the spectral preprocessing methods were optimised simultaneously by cross-validation in the model calibration. The performance of the final model was evaluated according to root mean square error of cross-validation (RMSECV), root mean square error of prediction (RMSEP) and correlation coefficient ( R ). The correlations coefficients ( R ) in the prediction set were achieved as follows: R  = 0.9852 for EGC model, R  = 0.9596 for EC model, R  = 0.9760 for EGCG model and R  = 0.9763 for ECG model. This work demonstrated that NIR spectroscopy with PLS algorithm could be used to analyse main catechins contents in green tea.

[1]  J. Luypaert,et al.  Determination of total antioxidant capacity in green tea by near-infrared spectroscopy and multivariate calibration. , 2004, Talanta.

[2]  Desire L. Massart,et al.  Feasibility study for the use of near infrared spectroscopy in the qualitative and quantitative analysis of green tea, Camellia sinensis (L.) , 2003 .

[3]  U. Engelhardt,et al.  Influence of catechins and theaflavins on the astringent taste of black tea brews , 1992 .

[4]  Andy H. Lee,et al.  Protective effect of green tea against prostate cancer: A case‐control study in southeast China , 2004, International journal of cancer.

[5]  Implementation of a simple semi-quantitative near-infrared method for the classification of clinical trial tablets. , 2005 .

[6]  M. Friedman,et al.  HPLC Analysis of Catechins, Theaflavins, and Alkaloids in Commercial Teas and Green Tea Dietary Supplements: Comparison of Water and 80% Ethanol/Water Extracts , 2006 .

[7]  Alastair Robertson,et al.  Near-infrared reflectance prediction of quality, theaflavin content and moisture content of black tea , 1988 .

[8]  Robert B Jordan,et al.  Comparing density and NIR methods for measurement of Kiwifruit dry matter and soluble solids content , 2002 .

[9]  Ying Dou,et al.  Simultaneous non-destructive determination of two components of combined paracetamol and amantadine hydrochloride in tablets and powder by NIR spectroscopy and artificial neural networks. , 2005, Journal of pharmaceutical and biomedical analysis.

[10]  P. Maliakal,et al.  Inhibition of carcinogenesis by tea. , 1997, Nature.

[11]  David J. Hewson,et al.  Classifying NIR spectra of textile products with kernel methods , 2007, Eng. Appl. Artif. Intell..

[12]  Zuo-Feng Zhang,et al.  Protective effect of green tea on the risks of chronic gastritis and stomach cancer , 2001, International journal of cancer.

[13]  Akira Kotani,et al.  Attomole Catechins Determination by Capillary Liquid Chromatography with Electrochemical Detection , 2007, Analytical sciences : the international journal of the Japan Society for Analytical Chemistry.

[14]  Roman M. Balabin,et al.  Gasoline classification by source and type based on near infrared (NIR) spectroscopy data , 2008 .

[15]  Hitoshi Kodamatani,et al.  High-performance liquid chromatography of aromatic compounds with photochemical decomposition and tris(2,2'-bipyridine)ruthenium(III) chemiluminescence detection. , 2006, Journal of chromatography. A.

[16]  H. Horie,et al.  Simultaneous determination of qualitatively important components in green tea infusions using capillary electrophoresis , 1997 .

[17]  Quansheng Chen,et al.  Determination of total polyphenols content in green tea using FT-NIR spectroscopy and different PLS algorithms. , 2008, Journal of pharmaceutical and biomedical analysis.

[18]  H. Schulz,et al.  Application of near-infrared reflectance spectroscopy to the simultaneous prediction of alkaloids and phenolic substances in green tea leaves. , 1999, Journal of agricultural and food chemistry.

[19]  H Une,et al.  Green tea consumption and chronic atrophic gastritis: a cross-sectional study in a green tea production village. , 2000, Journal of epidemiology.

[20]  H. Fujiki,et al.  Cancer prevention with green tea and monitoring by a new biomarker, hnRNP B1. , 2001, Mutation research.

[21]  Quansheng Chen,et al.  Feasibility study on qualitative and quantitative analysis in tea by near infrared spectroscopy with multivariate calibration. , 2006, Analytica chimica acta.

[22]  C. J. Clark,et al.  Detection of Brownheart in 'Braeburn' apple by transmission NIR spectroscopy , 2003 .

[23]  Yu’e Jiang,et al.  Simultaneous analysis of purine alkaloids and catechins in Camellia sinensis, Camellia ptilophylla and Camellia assamica var. kucha by HPLC , 2007 .

[24]  U. Engelhardt,et al.  Flavonoids and other polyphenols in consumer brews of tea and other caffeinated beverages. , 2000, Journal of agricultural and food chemistry.

[25]  M. Suganuma,et al.  Preventive effects of drinking green tea on cancer and cardiovascular disease: epidemiological evidence for multiple targeting prevention. , 2000, BioFactors.

[26]  C. Ruckebusch,et al.  Genetic algorithm optimisation combined with partial least squares regression and mutual information variable selection procedures in near-infrared quantitative analysis of cotton-viscose textiles. , 2007, Analytica chimica acta.