ISO INTERNATIONAL STANDARD 10399 Third edition 2017-12 Sensory analysis Methodology - Duo-trio test Analyse sensorielle - Méthodologie - Essai duo-trio Reference number ISO 10399:2017(E) [so @IS02017 IS0 10399:2017(E) COPYRIGHT PROTECTED DOCUMENT @ IS0 2017, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form writtenpermission.Permission canberequestedfromeitherIsOattheaddressbelow orIso'smemberbodyinthecountryof the requester. ISO copyrightoffice Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 [email protected] www.iso.org ii @ IS0 2017 - All rights reserved IS0 10399:2017(E) Contents Page Foreword ..iv 1 Scope .1 2 Normative references 3 Terms and definitions 4 Principle 5 General test conditions and requirements ..3 6 Assessors .3 6.1 Qualification .3 6.2 Number of assessors 7 Procedure. ..4 8 Analysis and interpretation of results ..5 8.1 When testing for a difference. .5 8.2 When testing for similarity ..5 9 Test report 10 Precision and bias ..6 Annex A (normative) Tables. ..7 Annex B (informative) Examples ..13 Bibliography .21 @ IS0 2017 - All rights reserved iii