ISO-6667 Green coffee -- Determination of proportion of insect-damaged beans

ISO-6667 - 1ST EDITION - CURRENT


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The method consists in visual examination of the external surface of beans to identify those which have been damaged by insects. Determination of the observed proportion, as a percentage, of damaged beans and, if possible, identification of the species of insect responible to damage. From the proportion of damaged beans thus determined: estimation of the confidence limits of the true proportion of damaged beans for a given probability; estimation of the probability that the true proportion of damaged beans will not exceed a given value. An annex A shows illustrations of damaged beans. An annex B describes a test for homogenity of the laboratory sample.

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Document Number

ISO 6667:1985

Revision Level

1ST EDITION

Status

Current

Publication Date

Nov. 1, 1985

Committee Number

ISO TC 34/SC 15/WG 1