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http://dx.doi.org/10.12791/KSBEC.2014.23.3.244

Application of Color Index for Red Grapes (CIRG) for Assessment of Grape Quality  

Choi, Jae-Youn (Hwaseong City Agricultural Technology Center)
Cho, Eun-Kyung (Hwaseong City Agricultural Technology Center)
Park, Seo-Jun (Technology service Division, National Institute of Horticultural & Herbal Science)
Hur, Youn-Young (Fruit research division, National Institute of Horticultural & Herbal Science (NIHHS))
Nam, Jong-Chul (Fruit research division, National Institute of Horticultural & Herbal Science (NIHHS))
Koh, Sang-Wook (Fruit research division, National Institute of Horticultural & Herbal Science (NIHHS))
Jung, Sung-Min (Fruit research division, National Institute of Horticultural & Herbal Science (NIHHS))
Publication Information
Journal of Bio-Environment Control / v.23, no.3, 2014 , pp. 244-249 More about this Journal
Abstract
Hunter value ($L^*$, $a^*$, $b^*$) is a rapid and convenience method for compare with different skin color, but not suitable to compare quality with various grape cultivars. Color Index for Red Grapes (CIRG) is one of a simply convert method for grape skin color as numeric data, and many previously result showed that high correlation between CIRG index and various quality factors of grape. In this experiment, we measured CIRG index, total soluble solids (TSS), titratable acidity (TA), and total anthocyanin content on the grapes (Campbell Early, Heukbosuk, Kyoho) from the varaison to harvest. As a result, CIRG index and anthocyanin contents have an exponential correlation; r-square is each 0.8595 in the 'Campbell Early' and 0.8500 in 'Heukbosuk'. And TSS and CIRG index have a positive r-square, at the Campbell Early is 0.7758 and Heukbosuk is 0.7253. Also TA and CIRG index have a positive r-square, at the Campbell Early is 0.7279 and Heukbosuk is 0.6630. These results were shown that CIRG index is a reliable indicator for a none-destructive evaluation of the grape quality.
Keywords
color space; colorimeter; regression analysis;
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