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IMPROVEMENTS IN ANALYSIS OF VITAMINS IN FOOD

Objective


Some 12 vitamins are commonly determined in foodstuffs for nutritional purposes (dietary and epidemiological surveys) and for food labelling purposes. An intercomparison of chemical and microbiological methods for determination of commonly measured vitamins (retinol, B1, B2, B6, B12, C, D3, beta-carotene, alpha-tocopherol and niacin) in milk powder, haricot verts beans and pork muscle and a vitamin mixture has been carried out. The results for retinol, alpha-tocopherol, vitamin C, beta-carotene and niacin agreed well for most of the materials analysed. Indicative values for these vitamins in the reference materials (RM) recently certified for the major nutrients will be proposed if stability is proven.

Methodological problems identified for folates, vitamins B1, B2, and B6, and vitamin D are being studied. Reference materials specially formulated for vitamin use have been prepared (fortified milk powder, brussels sprouts, margerine and flour) and a mixed vegetable sample (primarily for carotenoids) is under preparation.
Some 12 vitamins are commonly determined in foodstuffs for nutritional purposes (dietary and epidemiological surveys) and for food labelling purposes. Vitamins are included in Council Directive on Nutritional Labelling of Foodstuffs (90/496/EEC). Little is known about the reliability of such measurements and there is currently no means of ensuring traceability. The project has the general aim of method improvement and preparation of reference materials.

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

Institute of Food Research
Address
Norwich Laboratory Colney Lane
NR4 7UA Norwich
United Kingdom

Participants (18)

CSIC - Instituto del Frio
Spain
Address
Ciudad Universitaria
28040 Madrid
DUPHAR B.V.
Netherlands
Address

1380 DA Weesp
FEDERAL RESEARCH CENTRE FOR NUTRITION
Germany
Address
Haid-und-neu-strasse 9
76131 Karlsruhe
Federal Dairy Research Institute
Switzerland
Address

3097 Liebefeld-bern
Laboratory of the Government Chemist (LGC)
United Kingdom
Address
Queen's Road
TW11 0LY Teddington
National Food Administration
Sweden
Address
5,Hamnesplanaden
75126 Uppsala
National Food Agency of Denmark
Denmark
Address
19,Mörkhöj Bygade
2860 Söborg
Produits Roche
France
Address

94120 Fontenay Sous Bois
RIGB-Keuringsdienst van Waren
Netherlands
Address

6201 GA Maastricht
RIKILT
Netherlands
Address

6700 AE Wageningen
Steins Laboratorium
Denmark
Address
8,Hjaltesvej
7500 Holstebro
TNO Toxicology and Nutrition Institute
Netherlands
Address

3700 AJ Zeist
UNIVERSITA DEGLI STUDI DI PERUGIA
Italy
Address

06100 Perugia
UNIVERSITAET - GESAMTHOCHSCHULE PADERBORN
Germany
Address
Warburger Strasse 100
33098 Paderborn
Unilever UK Central Resources Ltd
United Kingdom
Address
Colworth House
MK44 1LQ Sharnbrook
University College of Cork
Ireland
Address

Cork
Università degli Studi di Perugia
Italy
Address

06100 Perugia
Universität Basel
Switzerland
Address
Vesalianum, Vesalgasse 1
4051 Basel