Journal of Food Measurement and Characterization

, Volume 13, Issue 3, pp 2130–2135 | Cite as

An electrical discrimination method for rot in fresh cut apples using Cole–Cole plots

  • Takashi WatanabeEmail author
  • Nobutaka Nakamura
  • Nobuyoshi Ota
  • Satoru Tomita
  • Yasumasa Ando
  • Takahiro Orikasa
  • Takeo Shiina
  • Masyasu Nagata
Original Paper


We evaluated the electrical properties of cut apples with and without rot incidence. Cole–Cole plots were prepared from the frequency characteristics of the electrical impedance of sample tissues and used for the analysis of the rotten samples. The coordinates at the top of the circular arc in Cole–Cole plots of all samples showed a linear regression, and it was estimated that the coordinates were influenced by extracellular fluid resistance. The coordinates of the samples were grouped according to the absence or presence of rot. It was deduced that the decrease in the position of the coordinates was caused by metabolites produced by multiplied bacteria in extracellular fluids. We showed that the Cole–Cole plot coordinates have potential as a simple, low-cost, and quantitative marker to aid in the rapid discrimination of rot in cut apples. This approach could be developed for use in the detection of postharvest disease during fruit processing, aiding in the construction of a high-quality supply-chain, and food-safety management.


Bacterial rot Postharvest disease Electrical impedance Cole–Cole plot Cut apple fruit 



Some parts of this study were supported by a Japan Society for the Promotion of Science KAKENHI Grant-in-Aid for Young Scientists (B) [Grant Number JP 17K15352].

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Food Research InstituteNAROTsukubaJapan
  2. 2.Institute of Fruit Tree and Tea ScienceNAROTsukubaJapan
  3. 3.Institute of Vegetable and Floriculture ScienceNAROTsuJapan
  4. 4.Faculty of AgricultureIwate UniversityMoriokaJapan
  5. 5.Agri-Innovation CenterIwate UniversityMoriokaJapan
  6. 6.Graduate School of HorticultureChiba UniversityMatsudoJapan

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