SIST EN ISO 3593:1998

Starch - Determination of ash (ISO 3593:1981)

Incineration of a test portion at a temperature of 900 °C, until complete disappearance of the carbon in the residue. The method specifies a procedure for the evaluation of natural and added mineral substances together. It applies to contents up to 2 %. It does not apply to hydrolysis products nor to oxidized starches, nor to other products containing more than 0,2 % of chloride. In other cases, see ISO 5809.

Stärke - Bestimmung der Asche (ISO 3593:1981)

Diese Internationale Norm legt ein Verfahren zur Bestimmung der Asche in Stärke fest. Das Verfahren ist bei nativen und modifizierten Stärken anwendbar, die nicht mehr als 2% Asche ergeben. Das Verfahren ist nicht anwendbar bei Hydrolysenprodukten, oxididierten Stärken und anderen Produkten, die mehr als 0,2% Chlorid, angegeben als Natriumchlorid, enthalten. In diesen Fällen ist das in ISO 5809 festgelegte Verfahren anzuwenden.

Amidons et fécules - Détermination des cendres (ISO 3593:1981)

La présente Norme internationale spécifie une méthode de détermination des cendres produites par les amidons et fécules. La méthode est applicable aux amidons et fécules natifs, ainsi qu'aux amidons et fécules transformés ne produisant pas plus de 2 % de cendres. Elle ne s'applique ni aux produits d'hydrolyse, ni aux amidons et fécules oxydés, ni aux produits contenant plus de 0,2 % de chlorure exprimé en chlorure de sodium. Dans les autres cas, utiliser la méthode spécifiée dans l'ISO 5809.1)

Škrob - Določevanje pepela (ISO 3593:1981)

General Information

• Status: Published
• Publication Date: 31-Oct-1998
• ICS: 67.180.20 - Starch and derived products
• Technical Committee: KŽP - Agricultural food products
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Nov-1998
• Due Date: 01-Nov-1998
• Completion Date: 01-Nov-1998
• Ref Project: EN ISO 3593:1994 - Starch - Determination of ash (ISO 3593:1981)

Overview

SIST EN ISO 3593:1998 is an internationally recognized standard developed by CEN for the determination of ash content in starch. This precise analytical method involves the incineration of a starch sample at 900 °C until complete combustion of carbon residues occurs. It evaluates both natural and added mineral substances collectively, applying specifically to starches containing up to 2% ash. The standard excludes hydrolysis products, oxidized starches, and starch-based products with chloride content over 0.2%, referring instead to ISO 5809 for those cases.

Key Topics

• Sample Preparation: Weigh a representative test portion, typically 2 to 10 grams depending on the starch type.
• Incineration Conditions: Ashing performed at 900 ± 25 °C in a controlled electric furnace until the residue is carbon-free.
• Apparatus Requirements:
  • Ashing dishes made of platinum or equivalent material resistant to high temperatures.
  • Desiccators with moisture-absorbing agents like phosphorus(V) oxide or silica gel.
  • Precise electric furnace with temperature regulation.
  • Analytical balance with a sensitivity of at least 0.0001 g.
• Calculation of Ash Content: Performed on both "as received" and dry bases using specific formulas accounting for moisture content measured per ISO 1666.
• Repeatability Criteria: Ensures results’ reliability by limiting allowable variance between duplicate measurements.
• Exclusions and Cross-References: Does not apply to starches with specific chemical modifications or chloride content; ISO 5809 is recommended for such materials.

Applications

• Quality Control in Starch Production: Manufacturers use this method to assess mineral content for consistency and compliance.
• Food Industry: Ensures that starches meet specified purity and ash content standards for food safety and labeling.
• Research and Development: Scientists utilize the method when analyzing starch derivatives or developing new starch-based products.
• Regulatory Compliance: Facilitates adherence to international food and agricultural standards involving starch quality.
• Agricultural Commodities Testing: Useful for determining ash content in native starches derived from potatoes, rice, wheat, maize, and manioc.

Related Standards

• ISO 5809 - Starch and derivatives: Specifies ash determination for starches and products excluded by ISO 3593, especially those with higher chloride content or modified characteristics.
• ISO 1666 - Starch: Defines moisture content determination methods necessary for accurate ash calculation.
• CEN Standards on Starch-Based Products - Offer additional guidelines related to starch quality and specific testing protocols.
• Other National Standards for Starch Testing - May reference or harmonize with ISO 3593 for local compliance.

Practical Value

SIST EN ISO 3593:1998 provides a robust and reproducible method for evaluating starch mineral content through ash determination, critical for maintaining product quality across various starch applications. The standard ensures that laboratories follow consistent procedures, enhancing data comparability internationally. Implementing this standardized technique supports food safety, product standardization, and supply chain transparency by accurately measuring mineral content in starch raw materials and derivatives.

Standards Content (Sample)

SLOVENSKI STANDARD
01-november-1998
âNURE'RORþHYDQMHSHSHOD,62
Starch - Determination of ash (ISO 3593:1981)
Stärke - Bestimmung der Asche (ISO 3593:1981)
Amidons et fécules - Détermination des cendres (ISO 3593:1981)
Ta slovenski standard je istoveten z: EN ISO 3593:1994
ICS:
67.180.20 Škrob in izdelki iz njega Starch and derived products
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

International Standard 3593
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION.MEIKAYHAPOAHAR OPf-AHM3AWlR l-l0 CTAH~APTM3ALWl@ORGANISATION INTERNATIONALE DE NORMALISATION
Starch - Determination of ash
Amidons et fhcules - Dhtermina tion des cendres
Second edition - 1981-10-01
UDC 664.2 : 543.822
Ref. No. ISO35934981 (EI
Descriptors : starch, determination of ash.
Price based on 2 pages
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 3593 was developed by Technical Committee ISO/TC 93,
Starch (including derivatives and b y-produc ts).
This second edition was submitted directly to the ISO Council, in accordance with
clause 5.10.1 of part 1 of the Directives for the technical work of ISO. lt cancels and
replaces the first edition (i.e. ISO 3593-1976), which had been approved by the
member bodies of the following countries :
Chile Netherlands United Kingdom
Czec hoslova kia Poland USSR
Y ugoslavia
France Romania
Spain
Germany, F. R.
Iran Turkey
The member bodies of the following countries had expressed disapproval of the docu-
ment on technical grounds :
Australia
USA
0 International Organkation for Standardkation, 1981
Printed in Switzerland
ISO 3593-1981 (E)
INTERNATIONAL STANDARD
Determination of ash
Starch -
0 Introduction 5 Apparatus
Native starches contain naturally small amounts of mineral Ordinary laboratory apparatus, and in particular :
substances. Converted starches may additionally contain
variable amounts of added mineral substances.
5.1 Ashing dishes, of platinum or of any other material
unaffected under the test conditions, with a flat base, a capac-
This International Standard specifies a procedure for the con-
ity of about 40 ml and a minimum usable surface area of
ventional evaluation of both of these amounts together.
15 cm*.
5.2 Desiccator, provided with a thick perforated rnetal
1 Scope and field of application
plate, and containing an efficient desiccant such as
phosphorus(V) Oxide, silica gel impregnated with Cobalt
This International Standard specifies a method for the deter-
chloride indicator, or granular anhydrous Calcium sulphate
mination of the ash yielded by starches.
similarly treated.
The method is applicable to native starches and to modified
starches yielding not more than 2 % of ash. lt does not apply to
5.3 Electric furnace with Ventilation, including a device
hydrolysis products nor to oxidized starches, nor to other
for control and adjustment of temperature to provide for in-
products containing more than 0,2 % of chlorid
...