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Photo-induced changes in the concentrations of individual chlorogenic acid isomers in potato (Solanum tuberosum) tubers and their complexation with ferric ions

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Summary

Changes in the concentrations of 3-, 4- and 5-caffeoylquinic acids in potato tubers exposed to light have been determined by high-performance liquid chromatography. In the first 24 to 48 hours the observed increases in total chlorogenic acid content was due primarily to an increase in 5-caffeoylquinic acid content but thereafter the rate of accumulation of the other isomers increased gradually. After 24 hours exposure 4-caffeoylquinic acid accounted for 10% of the total chlorogenic acid content of the tubers compared with 33% after 168 hours. The significance of this change in isomeric ratio on the spectral characteristics of potential ferrichlorogenic acid complexes was investigated in vitro. It was concluded that potato quality, as reflected in the development of after-cooking blackening, was dependent on total chlorogenic acid content and was unaffected by the relative concentrations of the individual isomers.

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Authors and Affiliations

  1. Scottish Crop Research Institute, Invergowrie, DD2 5DA, Dundee, Scotland, UK

    D. W. Griffiths & H. Bain

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  1. D. W. Griffiths
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  2. H. Bain
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Griffiths, D.W., Bain, H. Photo-induced changes in the concentrations of individual chlorogenic acid isomers in potato (Solanum tuberosum) tubers and their complexation with ferric ions. Potato Res 40, 307–315 (1997). https://doi.org/10.1007/BF02358012

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  • DOI: https://doi.org/10.1007/BF02358012

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