Ripeness Inspection of Oil Palm Fruits by Applying Hardness Test Technique

Thiensak Chucheep, Thiensak Chucheep, Narissara Mahathaninwong, Narissara Mahathaninwong, Suphatchakorn Limhengha, Suphatchakorn Limhengha, Duangrudee Petchui, Pattraporn Templong

2019

Abstract

The objective of this study was to investigate whether the ripeness of oil palm fruits could be estimated based on their hardness. The hardness was examined by indenting with a steel ball on the exocarp of the fruit with the required indentation force (kgf) measured. Five steel balls with diameters of 4, 6, 8, 10, and 12 mm were tested on CIRAD and COMPACT varieties of oil palm, with the fruits in unripe, under-ripe, and ripe stages. The results reveal that, on using five ball indenters, the average hardness of unripe oil palm fruit differs from those of under-ripe and ripe fruit, on both CIRAD and COMPACT varieties. In contrast, the average hardness of under-ripe and ripe stages did not differ, while the hardness in three stages oil palm fruits reflects the oil and moisture percentages. Oil percentages in the COMPACT oil palm fruit in unripe, under-ripe, and ripe stages were 27.71%, 75.11%, and 76.78%, respectively, and for CIRAD variety of oil palm these were 59.42%, 76.67%, and 75.79%, respectively. The empirical dependence of hardness on oil content was y=-1.47x2+11.20x+55.36 for the COMPACT oil palm and y=-1.90x2+3.21x+77.49 for the CIRAD oil palm.

Paper Citation

in Harvard Style

Chucheep T., Mahathaninwong N., Limhengha S., Petchui D. and Templong P. (2019). Ripeness Inspection of Oil Palm Fruits by Applying Hardness Test Technique. In Proceedings of the 16th ASEAN Food Conference - Volume 1: 16th AFC, ISBN 978-989-758-467-1, pages 279-283. DOI: 10.5220/0009981500002964

in Bibtex Style

@conference{16th afc19,
author={Thiensak Chucheep and Narissara Mahathaninwong and Suphatchakorn Limhengha and Duangrudee Petchui and Pattraporn Templong},
title={Ripeness Inspection of Oil Palm Fruits by Applying Hardness Test Technique},
booktitle={Proceedings of the 16th ASEAN Food Conference - Volume 1: 16th AFC,},
year={2019},
pages={279-283},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0009981500002964},
isbn={978-989-758-467-1},
}

in EndNote Style

TY - CONF

JO - Proceedings of the 16th ASEAN Food Conference - Volume 1: 16th AFC,
TI - Ripeness Inspection of Oil Palm Fruits by Applying Hardness Test Technique
SN - 978-989-758-467-1
AU - Chucheep T.
AU - Mahathaninwong N.
AU - Limhengha S.
AU - Petchui D.
AU - Templong P.
PY - 2019
SP - 279
EP - 283
DO - 10.5220/0009981500002964