PH—Postharvest technology: Non-destructive Identification of Woolly Peaches using Impact Response and Near-Infrared Spectroscopy
✍ Scribed by C. Ortiz; P. Barreiro; E. Correa; F. Riquelme; M. Ruiz-Altisent
- Book ID
- 102576193
- Publisher
- Elsevier Science
- Year
- 2001
- Tongue
- English
- Weight
- 238 KB
- Volume
- 78
- Category
- Article
- ISSN
- 0021-8634
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✦ Synopsis
A procedure which combines impact response and near-infrared sensing in a two-step classi"cation method has been developed for identi"cation of woolly peaches. Two hundred and seventy Maycrest peaches from three ripeness stages at harvest, stored during 0, 1, 2, 3 and 4 weeks at 1 and 53C, were tested by non-destructive techniques (non-destructive impact and near-infrared spectroscopy) in order to assess woolliness (also known as mealiness in apples). Destructive mechanical tests (Magness}Taylor, con"ned compression and shear rupture) were used as a reference method to identify woolly fruits. Non-destructive impact data were processed by discriminant analysis to segregate into two texture categories (crispy}"rm}hard and non-crispy}non-"rm}soft). In the same way, discriminant analysis techniques were used to classify into three juicy categories (low juicy, medium juicy and high juicy), according to the near-infrared second derivative curve. Combining nondestructive impact and near-infrared spectroscopy, not crispy, not "rm and soft fruit from the low juicy group were classi"ed as woolly. The percentage of correctly classi"ed fruits in both categories was 80%. The conditions about the experimental factors which enhance woolliness obtained from the destructive procedures were con"rmed by the non-destructive procedure.