Detection of apple deterioration using an electronic nose and zNose™

Changying Li, Paul H. Heinemann, Joseph Irudayaraj

Research output: Contribution to journalArticle

Abstract

Damage in apples can cause fruit spoilage, reduce commodity economic value, and give rise to food quality and safely concerns. This research investigated use of electronic nose (Enose, Cyranose 320) and zNose™ -based nondestructive protocols for rapid detection of deterioration in apples. Key compounds associated with apple aroma were identified using gas chromatography and mass spectrometry, and the differences were observed after 6 days exposure to artificially induced damage in the form of a cut. High-dimensional data were compressed by principal component analysis (PCA) and partial least squares (PLS). Linear discriminant analysis (LDA) and canonical variate analysis (CVA) models were developed based on the compressed data. Experiments showed that both the Enose and zNose were able to effectively detect the volatile differences between undamaged and damaged apples four or more days after the cut. Differences in number of cuts had some effect on volatile compound emissions. Apples subjected to two cuts and three cuts generated volatile profiles that were significantly different from uncut apples. Varying the orientation of cut apples did not give significant differences in the volatile profile. The PLS-LDA model produced the best correct classification rates: 96% using the zNose, and 85% using the Enose.

Original languageEnglish (US)
Pages (from-to)1417-1425
Number of pages9
JournalTransactions of the ASABE
Volume50
Issue number4
StatePublished - Jul 1 2007
Externally publishedYes

Keywords

  • Apple defect
  • Electronic nose
  • Food safety
  • Fruit quality evaluation
  • zNose

ASJC Scopus subject areas

  • Forestry
  • Food Science
  • Biomedical Engineering
  • Agronomy and Crop Science
  • Soil Science

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