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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.

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