EN ISO 5377:1994

Starch hydrolysis products - Determination of reducing power and dextrose equivalent - Lane and Eynon constant titre method (ISO 5377:1981)

Titration of a prescribed volume of mixed Fehling's solution with a solution of a test portion under specified conditions, using methylene blue as internal indicator. An informative annex provides a metod for testing standard reference anhydrous D-glucose, necessary for the procedure.

Stärkehydrolyseprodukte - Bestimmung des Reduktionsvermögens und des Dextroseäquivalents - Verfahren mit konstantem Titer nach Lane und Eynon (ISO 5377:1981)

Diese Internationale Norm legt ein mit konstantem Titer arbeitendes Verfahren nach Lane und Eynon zur Bestimmung des Reduktionsvermögens und des Dextroseäquivalents sämtlicher Stärkehydrolysate fest.

Produits d'hydrolyse de l'amidon ou de la fécule - Détermination du pouvoir réducteur et de l'équivalent en dextrose - Méthode Lane et Eynon à titre constant (ISO 5377:1981)

La présente Norme internationale spécifie la méthode Lane et Eynon à titre constant, pour la détermination du pouvoir réducteur et de l'équivalent en dextrose pour tous les produits d'hydrolyse de l'amidon ou de la fécule.

Škrobni hidrolizati - Določevanje redukcijske moči in dekstroznega ekvivalenta - Titrimetrijska metoda po Lanu in Eynonu

General Information

• Status: Published
• Publication Date: 24-Aug-1994
• Withdrawal Date: 27-Feb-1995
• ICS: 67.180.20 - Starch and derived products
• Technical Committee: CEN/SS C10 - Starch
• Drafting Committee: CEN/SS C10 - Starch
• Current Stage: 9093 - Decision to confirm - Review Enquiry
• Start Date: 13-Oct-1999
• Completion Date: 13-Oct-1999
• Ref Project: SIST EN ISO 5377:1998 - Starch hydrolysis products - Determination of reducing power and dextrose equivalent - Lane and Eynon constant titre method (ISO 5377:1981)

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 5377:1998
01-november-1998
âNUREQLKLGUROL]DWL'RORþHYDQMHUHGXNFLMVNHPRþLLQGHNVWUR]QHJDHNYLYDOHQWD
7LWULPHWULMVNDPHWRGDSR/DQXLQ(\QRQX
Starch hydrolysis products - Determination of reducing power and dextrose equivalent -
Lane and Eynon constant titre method (ISO 5377:1981)
Stärkehydrolyseprodukte - Bestimmung des Reduktionsvermögens und des
Dextroseäquivalents - Verfahren mit konstantem Titer nach Lane und Eynon (ISO
5377:1981)
Produits d'hydrolyse de l'amidon ou de la fécule - Détermination du pouvoir réducteur et
de l'équivalent en dextrose - Méthode Lane et Eynon a titre constant (ISO 5377:1981)
Ta slovenski standard je istoveten z: EN ISO 5377:1994
ICS:
67.180.20 Škrob in izdelki iz njega Starch and derived products
SIST EN ISO 5377:1998 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 5377:1998

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SIST EN ISO 5377:1998

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SIST EN ISO 5377:1998

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SIST EN ISO 5377:1998
International Standard
INTERNATIONAL ORGANIZATION FOR STANDARDlZATION.ME)I(C1YHAPOC1HAF OPrAHM3ALWlR fl0 CTAH&APTl43ALWlkl~ORGANISATlON INTERNATIONALE DE NORMALISATION
Starch hydrolysis products - Determination of reducing
power and dextrose equivalent - Lane and Eynon
constant titre method
Determination du pouvoir rbducteur et de l’equivalent en dextrose -
Produits d’hydrolyse de l’amidon ou de Ia f&ule -
Methode Lane et Eynon 6 titre constant
First edition - 1981-12-15
UDC 664.28 : 664.162.036 : 543.24 Ref. No. ISO 5377-1981 (E)
Descriptors : starches, tests, determination, mass losses, dry matter, titration.
Price based on 6 pages

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SIST EN ISO 5377:1998
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of
national Standards institutes (ISO member bodies). The work of developing Inter-
national Standards is carried out through ISO technical committees. Every member
body interested in a subject for which a technical committee has been set up 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.
Draft International Standards adopted by the technical committees are circulated to
the member bodies for approval before their acceptance as International Standards by
the ISO Council.
International Standard ISO 5377 was developed by Technical Committee ISO/TC 93,
Starch (including derivatives and by-productsl, and was circulated to the member
bodies in November 1980.
lt has been approved by the member bodies of the following countries :
Australia Netherlands
Austria Romania
Egypt, Arab Rep. of South Africa, Rep. of
France USA
Iran USSR
No member body expressed disapproval of the document.
0 International Organkation for Standardkation, 1981
Printed in Switzerland

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SIST EN ISO 5377:1998
ISO 5377-1981 (E)
INTERNATIONAL STANDARD
Starch hydrolysis products - Determination of reducing
power and dextrose equivalent - Lane and Eynon
constant titre method
4 Principle
1 Scope and field of application
This International Standard specifies a Lane and Eynon cons- Titration of a prescribed volume of mixed Fehling’s Solution
with a Solution of a test Portion under specified conditions,
tant titre method for the determination of the reducing power
using methylene blue as internal indicator.
and dextrose equivalent of all starch hydrolysis products.
2 References
5 Reagents
ISO 38511, Laboratory glassware - Burettes - Part 7:
During the analysis, use only reagents of recognized analytical
General reguiremen ts. 1)
grade and only distilled water or water of equivalent purity.
ISO 38512, Laboratory glassware - Part 2: Burettes for wbich
no waiting time is specified. l)
5.1 Fehling’s stock solutions
ISO 648, Laboratory glassware - One-mark pipettes.
Prepare the following solutions, using apparatus in accordance
with clause 6.
ISO 1042, Laboratory glassware - One-mark volumetric flasks.
ISO 1741, Dextrose - Determination of loss in mass on drying
5.1.1 Stock Solution A
- Vacuum oven method.
CopperU sulphate pentahydrate
69,3 g
ISO 1742, Glucose syrup - Determination of dry matter con-
(CUSOJ-~H~O)
tent - Vacuum oven method.
Water to 1 000,O ml
ISO 1743, Glucose syrup and dextrose - Determination of dry
Refractive index method.
matter content -
5.1.2 Stock Solution B
ISO 1773, Laboratory glassware - Boiling flasks (narrow-
necked).
Potassium sodium tartrate tetrahydrate
3460 g
(KNaC4H406-4H20)
l SO 5809, Starch, including derivatives and b y-products -
Sodium hydroxide (NaOH) 100
...