ISO INTERNATIONAL STANDARD 8682 First edition 1987-12-01 INTERNATIONALORGANIZATIONFORSTANDARDIZATION ORGANISATION INTERNATIONALE DE NORMALISATION MEXKAYHAPOAHAR OPTAHM3ALMH O CTAHAAPTW3ALMM Apples - Storage in controlled atmospheres Pommes - Entreposage en atmosphere controlee Referencenumber ISO 8682 : 1987 (E) No reproduction or networking permited without license from IHS Not for Resale Foreword ISo (the International Organization for Standardization) is a worldwide federation of national standards bodies (iso member bodies). The work of preparing International Standards is normally carried out through Iso technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern- mental and non-governmental, in liaison with Iso, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISo Council. They are approved in accordance with ISo procedures requiring at least 75 % approval by the member bodies voting. International Standard ISO 8682 was prepared by Technical Committee ISO/TC 34, Agricultural food products. Users should note that all International Standards undergo revision from time to time and that any reference made herein to any other International Standard implies its latest edition, unless otherwise stated. International Organization for Standardization,1987 Printed in Switzerland No reproduction or networking permitted without license from IHS Not for Resale ISO 8682 : 1987 (E) INTERNATIONAL STANDARD Apples - Storage in controlled atmospheres 0 Introduction 3.2 Harvesting Storage in a controlled atmosphere is based on the regulation Harvesting of apples intended for storage in controlled at- of three factors: temperature, relative humidity and the mospheres is carried out when their degree of ripening ensures chemical composition of the atmosphere in the store. good keeping characteristics. The principal criteria used to determine, for a given variety, the time of harvesting are as By using this method of storage, metabolic processes in the follows: fruits are reduced in intensity and ripening is slowed down, a) the shade of colour of the seed; while the nutritive value and appearance for sale are maintain ed; thus the keeping period is prolonged. As a result of the b) the presence of starch in the transverse section of the reduction in oxygen content and increase in carbon dioxide apple(iodinetest or potassium iodidetest); content, the development of pathogenic micro-organisms and the appearance of physiological diseases are greatly retarded. c)thestructural firmnessandtextureof theflesh; d) the number of days between flowering and harvesting; e) the ground colour (green-yellow) of the skin; Scope and field of application f) the onset of increase in ethylene production. This International Standard gives general guidance for the Harvesting of apples intended for storage in a controlled at- storage of apples in controlled atmospheres. mosphere should only be carried out manually. Because of numerous factors influencing the quality and keep- At the same time as harvesting, presorting should be carried ing characteristics of apples, the optimal conditions of storage out to separate the fruits not suitable for storage, particularly in controlled atmospheres differ according to the variety and those attacked by disease (notably bitter pit) or insects, those area of production. showing traces of rot,those damaged or having shape and growth defects. Apples should be handled and transported to the store in bins 2 References or boxes. Iso2169,Fruitsandvegetables -Physicalconditionsincold stores - Definitions and measurement 3.3 Qualitative characteristics of storage Iso 3659, Fruits and vegetables -- Ripening after cold storage. Apples intended for