Abstract Preview

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.


General information

  • Status :  Published
    Publication date : 1985-11
  • Edition : 1
    Number of pages : 12
  • :
    ISO/TC 34/SC 15
    Coffee
  • 67.140.20
    Coffee and coffee substitutes

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