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A Non-Destructive Measurement of Pigments of Whole Tomato by Light Reflectance Technique

Thiagu, R. and Onwuzulu, O.C. and Ramana, K. V. R. (1993) A Non-Destructive Measurement of Pigments of Whole Tomato by Light Reflectance Technique. Journal of Food Science and Technology (India), 30 (2). pp. 92-96.

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Abstract

<p align="justify">A Simple non-destructive method for estimating pigment content of tomato during ripening is described. Tomatoes sorted out subjectively into six ripening stages, from mature-green to over-ripe, were subjected to light reflectance measurements using a tristimulus photovoltic colour Instrument and also analysed for lycopene, chlorophyll and β-carotene contents( Simple linear coefficient of correlations between pigment values and ten reflectance parameters viz., lightness (L), redness (a), yellowness (b), hue (a/b), hue angle {θ=tan-1(b/a)}1 chroma (∆C), total colour difference (∆E), a/L, arc length {θ* sqr (aˆ2 + bˆ2)} and tomato colour (2000 * cosθ/L) were determined and suitable regression equations fitted to estimate lycopene, chlorophyll and β-carotene contents of tomatoes, using the best linear/non-linear function.</p>

Item Type: Article
Uncontrolled Keywords: Tomato, Pigment, Non-destructive measurement, Light reflectance technique, Ripening.
Subjects: 600 Technology > 08 Food technology > 14 Physical properties
600 Technology > 08 Food technology > 23 Vegetables > 03 Tomato
500 Natural Sciences and Mathematics > 04 Chemistry and Allied Sciences > 05 Calorimetric Analysis
Divisions: Fruit and Vegetable Technology
Depositing User: Food Sci. & Technol. Information Services
Date Deposited: 19 Jan 2006
Last Modified: 30 Dec 2016 10:56
URI: http://ir.cftri.com/id/eprint/307

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