Development of Physical and Optical Methods for In-shell Brazil Nuts Sorting and Aflatoxin Reduction

Fernanda de Mello and Vildes Scussel

Journal of Agricultural Science, 2009, vol. 1, issue 2, 3

Abstract: Physical methods for mechanically in-shell Brazil nut sorting by color, size, density and inner deterioration weredeveloped to assess nut quality and reduce aflatoxin contamination. Nuts were able to be sorted by color utilizing thestandard shell chromaticity components L*, a* and b* at ranges of 31.51 to 48.64, 4.09 to 10.07 and 11.90 to 22.95,respectively. It produced a homogeneous color batch and segregated the off-standard ones (darkest, lightest and stained).By size sorting utilizing three oval sectioned trays with the following dimensions 40x25, 35x23 and 20x19.5 mm[length x width] and vibration, nuts were sorted into three sizes Groups- I, II and III for large, medium and small,respectively. Through density sorting the light nuts (shell/nut

Date: 2009
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