NF EN ISO 27971

NF EN ISO 27971

July 2008
Standard Cancelled

Cereals and cereal products - Common wheat (Triticum aestivum L.) - Determination of alveograph properties of dough at constant hydration from commercial or test flours and test milling methodology

ISO 27971:2008 specifies a method of using an alveograph to determine the rheological properties of different types of dough obtained from “soft” to “hard” wheat flour (Triticum aestivum L.) produced by industrial milling or laboratory test milling. ISO 27971:2008 describes the alveograph test and how to use a laboratory mill to produce flour in two stages: 1) preparation of the wheat grain for milling to make it easier to separate the bran from the endosperm; and 2) the milling process itself, including the break system involving three fluted rollers, reduction of particle size between two smooth rollers and the use of a centrifugal sieving machine to grade the products.

See more
View the extract
Main informations

Collections

National standards and national normative documents

Publication date

July 2008

Number of pages

60 p.

Reference

NF EN ISO 27971

ICS Codes

67.060   Cereals, pulses and derived products

Classification index

V03-170

Print number

1 - 02/07/2008

International kinship

ISO 27971:2008

European kinship

EN ISO 27971:2008
Sumary
Cereals and cereal products - Common wheat (Triticum aestivum L.) - Determination of alveograph properties of dough at constant hydration from commercial or test flours and test milling methodology

ISO 27971:2008 specifies a method of using an alveograph to determine the rheological properties of different types of dough obtained from “soft” to “hard” wheat flour (Triticum aestivum L.) produced by industrial milling or laboratory test milling.

ISO 27971:2008 describes the alveograph test and how to use a laboratory mill to produce flour in two stages: 1) preparation of the wheat grain for milling to make it easier to separate the bran from the endosperm; and 2) the milling process itself, including the break system involving three fluted rollers, reduction of particle size between two smooth rollers and the use of a centrifugal sieving machine to grade the products.

Standard replaced by (1)
NF EN ISO 27971
August 2015
Standard Cancelled
Cereals and cereal products - Common wheat (Triticum aestivum L.) - Determination of alveograph properties of dough at constant hydration from commercial or test flours and test milling methodology

<p>ISO 27971:2015 specifies a method of determining, using an alveograph, the rheological properties of different types of dough obtained from common wheat flour (<i>Triticum aestivum</i> L.) produced by industrial milling or laboratory milling.</p>

Table of contents
View the extract
  • Avant-propos
    iv
  • Introduction
    v
  • 1 Domaine d'application
    1
  • 2 Références normatives
    1
  • 3 Principe
    1
  • 4 Réactifs
    2
  • 5 Appareillage
    2
  • 6 Échantillonnage
    3
  • 7 Préparation du blé pour la mouture d'essai
    7
  • 7.1 Nettoyage de l'échantillon pour laboratoire
    7
  • 7.2 Prise d'essai
    7
  • 7.3 Détermination de la teneur en eau dans le blé
    7
  • 7.4 Préparation du blé
    7
  • 8 Mouture d'essai
    9
  • 8.1 Généralités
    9
  • 8.2 Mode opératoire pour la mouture
    10
  • 8.3 Expression des résultats de la mouture
    11
  • 9 Préparation et essai à l'alvéographe
    11
  • 9.1 Vérifications préalables
    11
  • 9.2 Opérations préliminaires
    14
  • 9.3 Pétrissage
    14
  • 9.4 Préparation des éprouvettes de pâte
    14
  • 9.5 Essai à l'alvéographe
    17
  • 9.6 Expression des résultats de l'essai à l'alvéographe
    19
  • 10 Fidélité
    21
  • 10.1 Essais interlaboratoires
    21
  • 10.2 Limites de répétabilité
    21
  • 10.3 Limites de reproductibilité
    22
  • 10.4 Incertitude
    23
  • 11 Rapport d'essai
    25
  • Annexe A (informative) Caractéristiques du moulin Chopin-Dubois CD 1
    26
  • Annexe B (normative) Quantité d'eau à ajouter à une masse de blé pour son conditionnement hydrique
    28
  • Annexe C (informative) Exemple de feuille de mouture
    30
  • Annexe D (informative) Tableau de conversion de L en G
    32
  • Annexe E (informative) Données issues de l'essai interlaboratoires sur farine industrielle
    34
  • Annexe F (informative) Données issues de l'essai interlaboratoires sur farine de mouture d'essai
    37
  • Annexe G (informative) Instructions d'entretien de l'alvéographe
    48
  • Annexe H (informative) Évaluation de l'activité protéolytique dans les blés (T. aestivum L.) ou leurs farines
    50
  • Bibliographie
    52
ZOOM ON ... the Requirements department
To comply with a standard, you need to quickly understand its issues in order to determine its impact on your activity.

The Requirements department helps you quickly locate within the normative text:
- mandatory clauses to satisfy,
- non-essential but useful clauses to know, such as permissions and recommendations.

The identification of these types of clauses is based on the document “ISO / IEC Directives, Part 2 - Principles and rules of structure and drafting of ISO documents ”as well as on a constantly enriched list of verbal forms.

With Requirements, quickly access the main part of the normative text!

With Requirements, quickly access the main part of the normative text!
Need to identify, monitor and decipher standards?

COBAZ is the simple and effective solution to meet the normative needs related to your activity, in France and abroad.

Available by subscription, CObaz is THE modular solution to compose according to your needs today and tomorrow. Quickly discover CObaz!

Request your free, no-obligation live demo

I discover COBAZ