COLORIMETRIC MEASUREMENTS OF COCOA BEANS (Theobroma cacao)

Simple item page
dc.contributoren-US
dc.creatorMeulemans, Charles C.E.; Optical Radiation Consultancy “Opticon”, Haver 33, 5521 MS Eersel
dc.creatorT., Untung Surapati; Faculty of Agriculture and Forestry, Department of Plant Pest and Disease, Hasanuddin University, Makassar
dc.creatorTjatjo, Ardin; Estate Crops Extension Office of South Sulawesi
dc.date2013-07-30
dc.date.accessioned2021-09-07T02:43:41Z
dc.date.available2021-09-07T02:43:41Z
dc.descriptionA series of studies have been carried out to develop a simple, easy to use, and affordable device to measure the colour of cocoa beans. The present paper reports the development of the device based on colorimetric principles. An electronic device which enables cocoa smallholders to give an objective “onefigure” indication of the quality of their cocoa beans was described. A sensor was constructed which contained a red light emitting diode (LED) illuminating the target and a silicon photodiode detecting the reflected light. Because of the considerable difference in colour between dried unfermented and fermented cocoa beans, the differences in diffuse reflection of red light (660 nm) could be about 20 and very easy to measure. The method was checked with a spectrophotometer in the fixed mode at 660 nm, which revealed a high correlation coefficient. The sensor was combined with a microprocessor controlled electronic device for fast measurement of cocoa beans without any calculations which automatically counts the number of measured beans and gives the resulting average reflection value.en-US
dc.formatapplication/pdf
dc.identifierhttp://ejurnal.litbang.pertanian.go.id/index.php/ijas/article/view/653
dc.identifier10.21082/ijas.v3n2.2002.p52-57
dc.identifier.urihttps://repository.pertanian.go.id/handle/123456789/13321
dc.languageeng
dc.publisherIndonesian Agency for Agricultural Research and Developmenten-US
dc.relationhttp://ejurnal.litbang.pertanian.go.id/index.php/ijas/article/view/653/435
dc.sourceIndonesian Journal of Agricultural Science; Vol 3, No 2 (2002): October 2002; 52-57en-US
dc.source2354-8509
dc.source1411-982X
dc.subjectTHEOBROMA CACAO; COCOA BEANS; COLORIMETRY; QUALITY CONTROLS; QUALITYen-US
dc.titleCOLORIMETRIC MEASUREMENTS OF COCOA BEANS (Theobroma cacao)en-US
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion
dc.typeen-US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
653-1824-1-PB.pdf
Size:
195.84 KB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Indonesian Journal of Agricultural Science