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Tea classification and quality assessment using laser-induced fluorescence and chemometric evaluation

  • Liang Mei
  • Patrik Lundin
  • Mikkel Brydegaard
  • Shuying Gong
  • Desong Tang
  • Gabriel Somesfalean
  • Sailing He
  • Sune Svanberg
Publishing year: 2012
Language: English
Pages: 803-811
Publication/Series: Applied Optics
Volume: 51
Issue: 7
Document type: Journal article
Publisher: OSA

Abstract english

Laser-induced fluorescence was used to evaluate the classification and quality of Chinese oolong teas and jasmine teas. The fluorescence of four different types of Chinese oolong teas-Guangdong oolong, North Fujian oolong, South Fujian oolong, and Taiwan oolong was recorded and singular value decomposition was used to describe the autofluoresence of the tea samples. Linear discriminant analysis was used to train a predictive chemometric model and a leave-one-out methodology was used to classify the types and evaluate the quality of the tea samples. The predicted classification of the oolong teas and the grade of the jasmine teas were estimated using this method. The agreement between the grades evaluated by the tea experts and by the chemometric model shows the potential of this technique to be used for practical assessment of tea grades. (C) 2012 Optical Society of America


  • Atom and Molecular Physics and Optics


  • ISSN: 2155-3165
Mikkel Brygdegaard
E-mail: mikkel [dot] brydegaard [at] forbrf [dot] lth [dot] se

Associate senior lecturer

Combustion Physics

+46 46 222 76 57



Centre for Animal Movement Research
Evolutionary Ecology, Department of Biology
Ecology building S-223 62 Lund Sweden