OIL CONTENT OF RAPESEED

Objective

The determination of oil in rapeseed by solvent extraction methods is being replaced by rapid, nondestructive methods based on nuclear magnetic resonance (NMR). Calibration of these methods can be conveniently made with rapeseed whose oil content is determined by a solvent method. Results given by 3 solvent methods have been compared in order to assign a common reference value for oil content required for NMR calibration. The provisional certified values for the oil content (expressed on dry matter) are as follows:
CRM 446 (low oil content): 42.5 (+/- 0.1)%;
CRM 447 (medium oil content): 45.3 (+/- 0.2)%;
CRM 448 (high oil content): 49.2 (+/- 0.2)%.
The price paid by seed-crushers directly depends on the oil content of rapeseed and it is therefore essential to have rapid and accurate methods that can be used in the factory situation. Oil content is also important for reasons connected with the Common Agricultural Policy (CAP).
Traditionally, oil in rapeseed has been determined by solvent extraction methods, slow and potentially hazardous procedures which are being replaced by rapid, non-destructive methods based on Nuclear Magnetic Resonance (NMR). Calibration of these methods can be conveniently made with rapeseed having an oil content determined by a solvent method. There are three similar solvent methods in use for different purposes, ISO and EEC methods and that of the trade association FOSFA. These methods differ in details which could give rise to small but significant systematic differences in the results.
The object of the work is to compare the results given by the three methods and, if possible, to assign a common reference value for oil content to three rapeseed reference materials required for NMR calibration.

Programme(s)

• FP2-BCR 4 - Research and development programme (EEC) in the field of applied metrology and chemical analysis (Community Bureau of Reference - BCR), 1988-1992

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

Laboratorium van Het Comité van Graanhandelaren

Address

141,Elbeweg
3198 Lc Europoort-rotterdam
Netherlands

Participants (23)

Agrilab

Belgium

Address

Polderdijkweg - Hansadok 407
2030 Antwerpen

BIO-DATA

Germany

Address

Siemenstraße 18
6300 Giessen

BIPEA

France

Address

6/14,Avenue Louis Roche
92230 Gennevilliers

BRUKER

France

Address

34 Rue De L'industrie
67160 Wissembourg

Bayerische Landesanstalt für Bodenkultur und Pflanzenbau

Germany

Address

Vöttinger Straße 38
85354 Freising

CARGILL SOJA FRANCE

France

Address

Rue De Yokosuka
29200 Brest

CREPIN Analyses et Contrôle

France

Address

16 Rue Du Louvre
75001 Paris

Chemical Laboratory

Netherlands

Address

32,Coolhaven
3002 AA Rotterdam

Cooperative Agricole de Haute Normandie

France

Address

12 Rue De La Chaine
76041 Rouen

E R Bolton

United Kingdom

Address

20 Eastcheap
EC3 London

Erith Oil Works Ltd

United Kingdom

Address

Church Manor Way
DA8 IDL Erith

Handels- und Umweltschutzlaboratorium

Germany

Address

Stenzelring 14B
21107 Hamburg

Institut National Agronomique

France

Address

16 Rue Claude Bernard
75231 Paris

LABORAGRO

France

Address

77871 Montereau

Laboratoires Wolff

France

Address

15 Rue Charles Paradinas
92110 Clichy

Laboval

France

Address

95 Avenue Georges Brassens
26500 Bourg-les-valence

Landwirtschaftliche Untersuchungs- und Forschungsanstalt

Germany

Address

3250 Hameln

Landwirtschaftliche Untersuchungs- und Forschungsanstalt

Germany

Address

Mars-la-tour-straße 4
26121 Oldenburg

Landwirtschaftliche Untersuchungs- und Forschungsanstalt

Germany

Address

4400 Münster

Leatherhead Food Research Association

United Kingdom

Address

Randalls Road
KT22 7RY Leatherhead

SGS Laboratory Service

Netherlands

Address

3200 Ae Spijkenisse

Universität Hamburg

Germany

Address

Marseiller Straße 7
20355 Hamburg

Universität Hohenheim

Germany

Address

Emil-wolff Straße 14
7000 Stuttgart