Sensory analysis - Methodology - Triangle test (ISO 4120:2004)

ISO 4120:2004 describes 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 applies whether a difference can exist in a single sensory attribute or in several attributes.
The method is statistically more efficient than the duo-trio test, but has limited use with products that exhibit strong carryover and/or lingering flavours.
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 indication of the attributes responsible for the difference). The method is applicable only if the products are fairly homogeneous.
The method is effective for a) determining that either a perceptible difference results (triangle testing for difference), or a perceptible difference does not result (triangle testing for similarity) when, for example, a change is made in ingredients, processing, packaging, handling or storage; b) or for selecting, training and monitoring assessors.

Sensorische Analyse - Prüfverfahren - Dreiecksprüfung (ISO 4120:2004)

Diese Internationale Norm beschreibt ein Verfahren zur Feststellung, ob zwischen den Proben von zwei Prüf¬materialien ein wahrnehmbarer sensorischer Unterschied oder Ähnlichkeit vorhanden ist. Bei dem Verfahren wird nach dem Forced-Choice-Prinzip vorgegangen. Das Verfahren ist anwendbar, wenn der Unterschied nur bei einem einzelnen sensorischen Merkmal oder auch bei mehreren Merkmalen vorliegen kann.
Das Verfahren ist statistisch aussagekräftiger als die Duo-Trio-Prüfung, hat aber eine begrenzte Anwendung bei Prüfmaterialien, die starke überdeckende und/oder nachwirkende olfaktorische/gustatorische Eindrücke hinterlassen.
Das Verfahren ist auch anwendbar, wenn die Art des Unterschiedes unbekannt ist [das heißt, es bestimmt weder Größe noch Richtung eines Unterschiedes zwischen den Proben, noch liefert es Hinweise auf Merk¬male, die für den Unterschied verantwortlich sind]. Das Verfahren ist nur anwendbar, wenn die Prüfmaterialien homogen sind.
Das Verfahren eignet sich besonders für:
a)    die Untersuchung daraufhin
   ob ein wahrnehmbarer Unterschied (Dreiecksprüfung auf Unterschied) resultiert, oder
   ob kein wahrnehmbarer Unterschied (Dreiecksprüfung auf Ähnlichkeit) resultiert, wenn zum Beispiel eine Änderung von Zutaten, Verarbeitung, Verpackung, Behandlung oder Lagerung vorgenommen wurde.
b)    Oder für die Auswahl, Schulung und Leistungsüberprüfung von Prüfpersonen.

Analyse sensorielle - Méthodologie - Essai triangulaire (ISO 4120:2004)

L'ISO 4120:2004 décrit un mode opératoire permettant de déterminer s'il existe une différence sensorielle perceptible ou une similitude entre les échantillons de deux produits. La méthode est une procédure à choix forcé. Elle s'applique s'il existe une différence pour une seule propriété sensorielle ou pour plusieurs.
La méthode est statistiquement plus efficace que l'essai duo-trio, mais est d'une utilisation limitée pour les produits présentant une forte rémanence et/ou des arômes persistants.
La méthode est applicable même lorsque la nature de la différence est inconnue, ce qui signifie qu'elle ne détermine ni la taille ni le sens de la différence entre des échantillons et qu'elle ne donne pas non plus d'indications sur la ou les propriétés à l'origine de cette différence. La présente méthode n'est applicable que si les produits sont relativement homogènes.
La méthode est efficace pour a) déterminer qu'il existe une différence perceptible (essai triangulaire de différence), ou qu'il n'existe pas de différence perceptible (essai triangulaire de similitude) quand, par exemple, des modifications sont apportées aux ingrédients, à la transformation, à l'emballage, aux opérations de manutention ou de stockage; b) ou pour sélectionner, entraîner et contrôler les sujets.

Senzorična analiza - Metodologija - Preskus "triangel" (ISO 4120:2004)

General Information

Status
Withdrawn
Publication Date
24-Jul-2007
Withdrawal Date
16-Mar-2021
Technical Committee
Drafting Committee
Current Stage
9960 - Withdrawal effective - Withdrawal
Completion Date
17-Mar-2021

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Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 4120:2007
01-november-2007
6HQ]RULþQDDQDOL]D0HWRGRORJLMD3UHVNXVWULDQJHO ,62
Sensory analysis - Methodology - Triangle test (ISO 4120:2004)
Sensorische Analyse - Prüfverfahren - Dreiecksprüfung (ISO 4120:2004)
Analyse sensorielle - Méthodologie - Essai triangulaire (ISO 4120:2004)
Ta slovenski standard je istoveten z: EN ISO 4120:2007
ICS:
67.240 6HQ]RULþQDDQDOL]D Sensory analysis
SIST EN ISO 4120:2007 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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EUROPEAN STANDARD
EN ISO 4120
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2007
ICS 67.240

English Version
Sensory analysis - Methodology - Triangle test (ISO 4120:2004)
Analyse sensorielle - Méthodologie - Essai triangulaire (ISO Sensorische Analyse - Prüfverfahren - Dreiecksprüfung
4120:2004) (ISO 4120:2004)
This European Standard was approved by CEN on 12 July 2007.
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 any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN Management Centre or to any CEN member.
This European Standard exists in three official 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 Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2007 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 4120:2007: E
worldwide for CEN national Members.

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EN ISO 4120:2007 (E)






Foreword


The text of ISO 4120:2004 has been prepared by Technical Committee ISO/TC 34 "Agricultural
food products” of the International Organization for Standardization (ISO) and has been taken
over as EN ISO 4120:2007 by Technical Committee CEN/SS C01 "Food Products", the
secretariat of which is held by CMC.

This European Standard shall be given the status of a national standard, either by publication of
an identical text or by endorsement, at the latest by January 2008, and conflicting national
standards shall be withdrawn at the latest by January 2008.

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, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United
Kingdom.


Endorsement notice

The text of ISO 4120:2004 has been approved by CEN as EN ISO 4120:2007 without any
modifications.

2

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INTERNATIONAL ISO
STANDARD 4120
Second edition
2004-06-15


Sensory analysis — Methodology —
Triangle test
Analyse sensorielle — Méthodologie — Essai triangulaire




Reference number
ISO 4120:2004(E)
©
ISO 2004

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ISO 4120:2004(E)
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