บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Nondestructive techniques for measuring quality of fruit and vegetable

Nicolai B.M.; Lammertyn J.; Veraverbeke E.; Jancsok P. and Verlinder B.

5th International Postharvest Symposium . Volume of Abstract . Verona, Italy 6-11 June 2004, p.116

2004

บทคัดย่อ

Nondestructive techniques for measuring quality of fruit and vegetable In this presentation an overview will be given of nondestructive techniques for measuring quality of horticultural produce. First vibration based techniques to measure mechanical properties of fruit will be reviewed. These techniques are based o­n the measurement of the vibration spectrum of a fruit after impact. Several commercial firmness measurement devices based o­n this principle are currently available. Related techniques such as the laser puff firmness sensor and other impact-based devices will be discussed as well.

Optical techniques have been used extensively for the measurement of quality attributes such as colour, soluble solids content and firmness of fruit and vegetables. Here we will concentrate o­n the potential and limitations of NIR infrared spectroscopy. Several grading machines with o­nline NIR sensors for soluble solid content are currently commercially available, as well as dedicated standalone sensors. We will also discuss some novel techniques such as space resolved and time resolved spectroscopy for the estimation of light scattering in vegetable tissue, as well as NIR imaging techniques.

Aroma is traditionally measured using headspace GC-MS. Electronic noses have been introduced as a fast alternative to measure aroma. We will review some electronic nose principles and applications, as well as some recent advantes in headspace fingerprinting mass spectroscopy.

Tomagraphic techniques allow to visualise the internal structure of fruit and vegetables. The potential of laser confocal microscopy, magnetic resonance imaging and X-ray CT will be summarised.