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Spatial variability of theaflavins and thearubigins fractions and their impact on black tea quality

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Abstract

The spatial distribution of theaflavin and thearubigin fractions and their impact on black tea quality were investigated using multivariate and geostatistics techniques. Black tea samples were collected from tea gardens of six geographical regions of Assam and West Bengal, India. Total theaflavin (TF) and its four fractions of upper Assam, south bank and North Bank teas were higher than the other regions. Simple theaflavin showed highest significant correlation with tasters’ quality. Low molecular weight thearubigins of south bank and North Bank were significantly higher than other regions. Total thearubigin (TR) and its fractions revealed significant positive correlation with tasters’ organoleptic valuations. Tea tasters’ parameters were significantly and positively correlated with each other. The semivariogram for quality parameters were best represented by gaussian models. The nugget/sill ratio indicated a strong/moderate spatial dependence of the studied parameters. Spatial variation of tea quality parameters may be used for quality assessment in the tea growing areas of India.

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Authors and Affiliations

  1. Tocklai Tea Research Institute, Tea Research Association, Jorhat, Assam, 785008, India

    Lakshi Prasad Bhuyan, Paban Borah, Santanu Sabhapondit & Ramen Gogoi

  2. Indian Statistical Institute, North-East Centre, Tezpur, Assam, 784028, India

    Pradip Bhattacharyya

Authors
  1. Lakshi Prasad Bhuyan
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  2. Paban Borah
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  3. Santanu Sabhapondit
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  4. Ramen Gogoi
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  5. Pradip Bhattacharyya
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Correspondence to Lakshi Prasad Bhuyan or Pradip Bhattacharyya.

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Bhuyan, L.P., Borah, P., Sabhapondit, S. et al. Spatial variability of theaflavins and thearubigins fractions and their impact on black tea quality. J Food Sci Technol 52, 7984–7993 (2015). https://doi.org/10.1007/s13197-015-1968-z

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  • DOI: https://doi.org/10.1007/s13197-015-1968-z

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