BS ISO BRITISH STANDARD 2173:2003 Fruit and yegetable products - Determination of soluble solids - Refractometric method Confirmed ICS 67.080.01 March 2010 BSi British Standards BS ISO 2173:2003 National foreword This British Standard reproduces verbatim IS0 2173:2003 and implements it as the UK national standard. There has been no UK participation in the preparation of this document. Any enquiries on the text should be sent to the Head of Standards - International Content. Cross-references The British Standards which implement international publications referred to in this document may be found in the BSI Catalogue under the section entitled "InternationalStandardsCorrespondencelndex",orbyusingthe"Search facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance witha British Standard does not ofitself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages i and ii, a blank page, pages 1 to 8, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication This British Standard was published under the authority Amd. No. Date Comments of the Standards Policy and Strategy Committee on 2December2003 C BSI 2 December 2003 ISBN 0 580 43012 X BS ISO 2173:2003 INTERNATIONAL ISO STANDARD 2173 Second edition 2003-12-01 Fruit and vegetable products Determination of soluble solids - Refractometric method Produits derivés des fruits et légumes - Determinationduresidusec solubleMethode réfractometrique Reference number ISO 2173:2003(E) BS ISO 2173:2003 = BS IS0 2173:2003 Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies technicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeen non-governmental, in liaison with isO, also take part in the work. sO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. isO shall not be held responsible for identifying any or all such patent rights. ISO 2173 was prepared by Technical Committee ISO/TC 34, Food products, Subcommittee SC 3, Fruit and vegetableproducts. Thissecondeditioncancelsandreplacesthefirstedition(lSO2173:1978),whichhasbeentechnicallyrevised i BS ISO 2173:2003 blank BS ISO 2173:2003 Fruit and vegetable products Determination of soluble solids Refractometric method 1 Scope This International Standard specifies a refractometric method for the determination of the soluble solids in fruit and vegetable products. This method is particularly applicable to thick products, to products containing suspended matter, and to nevertheless, for convenience the result obtained by this method can be considered conventionally as the solublesolidscontent. NOTE For the determination of the soluble solids infruit juices (not containing suspendedmatter)andin Terms and definitions For the purposes of this document, the following terms and definitions apply. 2.1 soluble solids determined by the refractometric method under specified conditions of preparation and temperature NOTE This concentration is expressed as a mass fraction in percent. 3 Principle The refractive index of a test solution is measured at 20 C ± O,5 C using a refractometer. The refractive index is correlated with the amount of soluble solids (expressed as sucrose concentration) using tables, or by direct r