EN ISO 10399-2018 en Sensory analysis - Methodology - Duo-trio test.pdf

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1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Sensory analysis Methodology Duo-trio test (ISO 10399:2017)BS EN ISO 10399:2018EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 10399 January 2018 ICS 67.240 Supersedes EN ISO 10399:2010English Version Sensory a

2、nalysis - Methodology - Duo-trio test (ISO 10399:2017) Analyse sensorielle - Mthodologie - Essai duo-trio (ISO 10399:2017) This European Standard was approved by CEN on 10 December 2017. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for givi

3、ng this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three offi

4、cial versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of

5、 Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia,

6、 Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels 2018 CEN All rights of exploitation in any form and by any means reserved

7、worldwide for CEN national Members. Ref. No. EN ISO 10399:2018 ENational forewordThis British Standard is the UK implementation of EN ISO 10399:2018. It is identical to ISO 10399:2017. It supersedes BS EN ISO 10399:2010, which is withdrawn.The UK participation in its preparation was entrusted to Tec

8、hnical Committee AW/12, Sensory analysis.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards

9、 Institution 2018 Published by BSI Standards Limited 2018ISBN 978 0 580 99332 9ICS 67.240Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2018.Amendments

10、/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN ISO 10399:2018EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 10399 January 2018 ICS 67.240 Supersedes EN ISO 10399:2010English Version Sensory analysis - Methodology - Duo-trio test (ISO 10399:2017) Analyse sensori

11、elle - Mthodologie - Essai duo-trio (ISO 10399:2017) This European Standard was approved by CEN on 10 December 2017. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without an

12、y alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other langua

13、ge made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark,

14、 Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMI

15、TTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels 2018 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 10399:2018 EBS EN

16、ISO 10399:2018EN ISO 10399:2018 (E) 3 European foreword This document (EN ISO 10399:2018) has been prepared by Technical Committee ISO/TC 34 “Food products“. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the

17、latest by July 2018, and conflicting national standards shall be withdrawn at the latest by July 2018. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights

18、. This document supersedes EN ISO 10399:2010. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Form

19、er Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of IS

20、O 10399:2017 has been approved by CEN as EN ISO 10399:2018 without any modification. BS EN ISO 10399:2018ISO 10399:2017(E)Foreword iv1 Scope . 12 Normative references 13 Terms and definitions . 14 Principle 25 General test conditions and requirements . 36 Assessors 36.1 Qualification 36.2 Number of

21、assessors 37 Procedure. 48 Analysis and interpretation of results . 58.1 When testing for a difference . 58.2 When testing for similarity. 59 Test report . 510 Precision and bias . 6Annex A (normative) Tables 7Annex B (informative) Examples .13Bibliography .21 ISO 2017 All rights reserved iiiContent

22、s PageBS EN ISO 10399:2018ISO 10399:2017(E)ForewordISO (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

23、body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electr

24、otechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of

25、ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).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 r

26、esponsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information gi

27、ven for the convenience of users and does not constitute an endorsement.For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) princ

28、iples in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.This document was prepared by Technical Committee ISO/TC 34, Food products, Subcommittee SC 12, Sensory analysis.This third edition cancels and replaces the second edition (ISO 10399:2004), of which i

29、t constitutes a minor revision. The references have been updated, the definition for 3.6 has been replaced and an expression in A.3 has been corrected.iv ISO 2017 All rights reservedBS EN ISO 10399:2018INTERNATIONAL STANDARD ISO 10399:2017(E)Sensory analysis Methodology Duo-trio test1 ScopeThis docu

30、ment specifies a procedure for determining whether a perceptible sensory difference or similarity exists between samples of two products. The method is a forced-choice procedure. The method is applicable whether a difference exists in a single sensory attribute or in several attributes.The method is

31、 statistically less efficient than the triangle test (described in ISO 4120) but is easier to perform by the assessors.The method is applicable even when the nature of the difference is unknown (i.e. it determines neither the size nor the direction of difference between samples, nor is there any ind

32、ication of the attribute(s) responsible for the difference). The method is applicable only if the products are fairly homogeneous.The method is effective fora) determining that1) either a perceptible difference results (duo-trio testing for difference), or2) a perceptible difference does not result

33、(duo-trio testing for similarity) when, for example, a change is made in ingredients, processing, packaging, handling or storage, andb) for selecting, training and monitoring assessors.Two forms of the method are described: the constant-reference technique, used when one product is familiar to the a

34、ssessors (e.g. a sample from regular production); the balanced-reference technique, used when one product is not more familiar than the other.2 Normative referencesThe following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this doc

35、ument. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 5492, Sensory analysis VocabularyISO 8589, Sensory analysis General guidance for the design of test rooms3 Terms and definitionsFo

36、r the purposes of this document, the terms and definitions given in ISO 5492 and the following apply.ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at http:/www.electropedia.org/ ISO Online browsing platform: available

37、 at https:/www.iso.org/obp ISO 2017 All rights reserved 1BS EN ISO 10399:2018ISO 10399:2017(E)3.1alpha-risk-riskprobability of concluding that a perceptible difference (3.3) exists when one does notNote 1 to entry: This is also known as Type I error, significance level or false positive rate.3.2beta

38、-risk-riskprobability of concluding that no perceptible difference (3.3) exists when one doesNote 1 to entry: This is also known as Type II error or false negative rate.3.3differencesituation in which samples (3.5) can be distinguished based on their sensory propertiesNote 1 to entry: The proportion

39、 of assessments in which a perceptible difference is detected between the two products is given the symbol pd.3.4productmaterial to be evaluated3.5sampleunit of product (3.4) prepared, presented and evaluated in the test3.6sensitivitystatistical parameters that measure the performance characteristic

40、s of the testNote 1 to entry: In statistical terms, the sensitivity of the test is defined by the values of , and pd.3.7similaritysituation in which any perceptible differences (3.3) between the samples (3.5) are so small that the products (3.4) can be used interchangeably3.8triadthree samples (3.5)

41、 given to an assessor in the duo-trio testNote 1 to entry: In the duo-trio test, one sample is labelled as the reference, the other two are marked with different codes. One of the coded samples is the same product as the reference; the other coded sample is the other product in the test.4 PrincipleT

42、he number of assessors is chosen based on the sensitivity desired for the test (see 6.2 and the discussion in A.3).Assessors receive a set of three samples (i.e. a triad), one sample of which is labelled as a reference and the other two samples have different codes. The assessors are informed that o

43、ne of the coded samples is the same as the reference and that one is different. Based on their training and the instructions given prior to the test, the assessors report either which of the coded samples they believe to be same as the reference, or which of the coded samples they believe to be diff

44、erent from the reference.The number of correct responses is counted and the significance is determined by reference to a statistical table.2 ISO 2017 All rights reservedBS EN ISO 10399:2018ISO 10399:2017(E)5 General test conditions and requirements5.1 Clearly define the test objective in writing.5.2

45、 Carry out the test under conditions that prevent communication among assessors until all the evaluations have been completed using facilities and booths that conform with ISO 8589.5.3 Prepare the samples out of sight of the assessors and in an identical manner (i.e. same apparatus, same vessels, sa

46、me quantity of product).5.4 Assessors shall not be able to identify the samples from the way in which they are presented. For example, in a taste test, avoid any differences in appearance. Mask any irrelevant colour differences using light filters and/or subdued illumination.5.5 Code the vessels con

47、taining the samples in a uniform manner, preferably using three-digit numbers, chosen at random for each test. Each triad is composed of three samples, one labelled as the reference and two labelled with different codes. Preferably, different codes should be used for each assessor during a session.

48、However, the same two codes may be used for all assessors within a test, provided that each code is used only once per assessor during a test session (e.g. if several duo-trio tests on different products are being conducted in the same session).5.6 The quantity or volume served shall be identical fo

49、r the three samples in each triad, just as that of all the other samples in a series of tests on a given type of product. The quantity or volume to be evaluated may be imposed. If it is not, the assessors should be told to take quantities or volumes that are always similar whatever the sample.5.7 The temperature of the three samples in each triad shall be identical, just as that of all the other samples in a series of tests on a given type of product. It is preferable to present the samples at the temperature at which the product is ge