EN ISO 5809:1994
(Main)Starches and derived products - Determination of sulphated ash
Starches and derived products - Determination of sulphated ash
Incineration of a test portion, in the presence of sulphuric acid, at a temperature of 525 25 °C. The result is expressed as a percentage by mass either of the product as received or on dry basis.
Stärke und Stärkederivate - Bestimmung der Sulfatasche
Diese internationale Norm legt ein Verfahren zur Bestimmung der Sulfatasche in Stärke und Stärkederivaten fest.
Amidons, fécules et produits dérivés - Détermination des cendres sulfatées
La présente Norme internationale spécifie une méthode de détermination des cendres sulfatées dans les amidons, fécules et leurs produits dérivés.
Škrob in škrobni derivati - Določevanje sulfatnega pepela
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-november-1998
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Starches and derived products - Determination of sulphated ash
Stärke und Stärkederivate - Bestimmung der Sulfatasche
Amidons, fécules et produits dérivés - Détermination des cendres sulfatées
Ta slovenski standard je istoveten z: EN ISO 5809:1994
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
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION.MEXAYHAPO~HAR OPrAHM3ALWlR fl0 CTAHAAPTM3AlUlM~RGANISATION INTERNATIONALE DE NORMALISATION
Starches and derived products - Determination of
sulphated ash
Arnidons, fhcules et produits d&iv6s -
06 termina tion des cendres sulfa tees
First edition - 1982-12-01
UDC 664.2: 543.822
Ref. No. ISO 58094982 (E)
Descriptors :
starches, Chemical analysis, determination of sulphated ash.
Price based on 3 pages
oreword
ISO (the International Organization for Standardization) is a worldwide federation of
national Standards institutes (ISO member bedies). 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 5809 was developed by Technical Committee lSO/TC 93,
Starch fincluding derivatives and by-productsl, and was circulated to the member
bodies in February 1982.
lt has been approved by the member bodies of the following countries :
Austria
Netherlands South Africa, Rep. of
Egypt, Arab Rep. of Poland USA
France Portugal USSR
Germany, F. R. Romania
No member body expressed disapproval of the document.
International Organkation for Standardkation, 1982
Printed in Switzerland
INTERNATIONAL STANDARD ISO 5809-1982 (E)
Starches and derived products - Determination of
sulphated ash
5. l Sulphuric acid solution.
1 Scope and field of application
This International Standard specifies a method for the deter- Add, carefully, 100 ml of concentrated sulphuric acid,
mination of sulphated ash in starches and derived products. e20 1,83 g/ml, to 300 ml of water and mix.
5.2 Hydrochlorit acid soiution.
2 References
Add, carefully, 100 ml of concentrated hydrochloric acid,
Determination of moisture content -
ISO 1666, Star& - e20 1,19 g/ml, to 500 ml of water and mix.
@en-drying methods. 1)
- Determination of Ioss in mass on drying
ISO 1741, Dextrose 6 Apparatus
- Vacuum oven method.
Ordinary laboratory apparatus, and in particular
ISO 1742, Glucose syrups - Determination of dry matter -
Vacuum oven method.
6.1 Incineration dish, of platinum or any other material
which does not deteriorate under the test conditions (for exam-
Determination o f dry matter --
ISO 1743, Glucose syrup - ple a silica incineration dish), of capacity 100 to 200 ml and with
Refractive index method.
a minimum useful surface of 15 cm2.
6.2 Electric furnace with air circulation, capable of being
3 Definition
controlled at 525 tr 25 OC.
sulphated ash: The residue obtained after incineration of the
6.3 Electric hot-plate or gas burner or heating lamp.
product, according to the method specified in this International
Standard.
6.4 Desiccator, provided with an efficient desiccant.
lt is expressed as a percentage by mass either of the product as-
6.5 Water bath, capable of being controlled at 60 to 70 OC.
received or on the dry basis.
6.6 Analytical balance.
4 Principle
Incineration of a test Portion, in the presence of sulphuric acid, 7 Procedure
at a temperature of 525 k 25 OC.
7.1 Preparation of the incineration dish
The sulphuric acid facilitates the destruction of the organic
matter and avoids losses by converting the volatile chlorides Clean the incineration dish (6.1), whether it is new or used,
with boiling hydrochloric acid Solution (5.2), then rinse
into non-volatile sulphates.
generously with water.
Calcinate the incineration dish for 30 min in the furnace (6.21,
5 Reagents
controlled at 525 k 25 OC. Allow to cool to ambient
During the analysis, use only reagents of recognized analytical temperature in the desiccator (6.4) and weigh to the nearest
quality and only distilled water or water of at least equivalent 0,000 2 g (the incineration dish should be calcinated to con-
purity. stant mass).
1) Under revision.
ISO 5809-1982 (E)
the electric hot-plate or gas burner or using the he
...
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