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Bioimpedance Study on Four Apple Varieties

  • Q. Fang
  • X. Liu
  • I. Cosic
Part of the IFMBE Proceedings book series (IFMBE, volume 17)

Abstract

Electrical Impedance Spectroscopy (EIS) has been used extensively to characterize electrical properties of plant tissue. This research explores the potential connections between electrical impedance and the major parameters can contribute to fruit taste. Experiments were performed on four apple varieties, Granny Smith, Fuji, Pink Lady and Red Delicious respectively. Electrical impedance was measured using a Solartron 1260A Impedance/Gain-Phase Analyzer at frequency range from 1Hz to 1MHz. Soluble solid content (SSC), titratable acidity (TA) and pH value of apple were measured as chemical parameters. It has been observed that the four apple varieties can be divided into three groups according to the ratio of SSC to TA (p<0.05), namely the low-acid variety, the high-acid variety, and the medium-acid variety. The three groups can also be exhibited from the correlations between impedance square root (ISR) and SSC and/or TA. SSC correlates linearly with impedance for low-acid variety, TA has linear relationship with ISR for high-acid variety, and both SSC and TA contribute to the linear relationship with ISR for medium variety.

Keywords

Malic Acid Electrical Impedance Titratable Acidity Soluble Solid Content Apple Cultivar 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    Johnson I. T. (2004) New Approaches to the Role of Diet in the Prevention of Cancers of the Alimentary Tract. Mutation Research 551:9-28.Google Scholar
  2. 2.
    Wu X.L., Beecher G.R., Holden J.M. et al (2004) Lipophilic and Hydrophilic Antioxidant Capacities of Common Foods in the United States. J Agric Food Chem 52: 4026-4037.CrossRefGoogle Scholar
  3. 3.
    Rogers E.J., Milhalik S., Ortizz D. et al (2003) Apple Juice Prevents Oxidative Stress and Impaired Cognitive Performance Caused by Genetic and Dietary Deficiencies in Mice. The Journal of Nutrition, Health & Aging 7:92-97.Google Scholar
  4. 4.
    Marchand L. L., Murphy S. P., Hankin J. H. et al (2000) Intake of Flavonoids and Lung Cancer. Journal of the National Cancer Institute 92: 154-160.CrossRefGoogle Scholar
  5. 5.
    Pecoraro P., Guida B., Caroli M. et al (2003) Body Mass Index and Skinfold Thickness Versus Bioimpedance Analysis: Fat Mass Prediction in Children. Acta Diabeetol 40: 278-281.CrossRefGoogle Scholar
  6. 6.
    Garner D., Crisosto C. H., Wiley P. et al (2005) Measurement of pH and Titratable Acidity. In Quality Evaluation Methodology. USA: Kearney Agricultural Center.Google Scholar
  7. 7.
    Fellers P. J. (1991) The Relationship Between the Ratio of Degrees Brix to Percent Acid and Sensory Flavor in Grapefruit Juice. Food Technology 45: 68-75.Google Scholar
  8. 8.
    Harker F. R., Marsh K. B., Young H. et al (2002) Sensory Interpretation of Instrumental Measurement 2: Sweet and Acid Taste of Apple Fruit. Postharvest Biology and Technology 24:241-250.CrossRefGoogle Scholar
  9. 9.
    Ferris C. D. (1974) Introduction to Bioelectrodes. New York: Plenum Press.Google Scholar
  10. 10.
    Hoehn E., Gasser F., Guggenbuhl B. et al (2003) Efficacy of Instrumental Measurements for Determination of Minimum Requirements of Firmness, Soluble Solids, and Acidity of Several Apple Varieties in Comparison to Consumer Expectations. Postharvest Biology and Technology 27:27-37.CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2007

Authors and Affiliations

  • Q. Fang
    • 1
  • X. Liu
    • 1
  • I. Cosic
    • 1
  1. 1.RMIT University, School of Electrical and Computer EngineeringMelbourneAustralia

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