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Library Catalogue

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    Union Catalogue of Agricultural Libraries in the Netherlands

    The WUR Library Catalogue contains bibliographic data on books and periodicals held by the libraries of Wageningen University and Research Centre and some 15 associated libraries. Holding data are added to each record.

    Subjects covered include Agrotechnology, Food and Food Production, Plant and Animal Sciences, Soil Science, Geo-information, Landscape and Spatial Planning, Water and Climate, Ecosystem Studies, Economics and Society.

    The joint collections of the participating libraries cover a substantial part of the internationally available scientific literature in these disciplines.

    As far as Dutch scientific literature in these fields is concerned, coverage can be considered near 100%, including much of the so-called "grey literature".

    All titles are entered in their original language. Keywords are added to facilitate subject searching.

    The database is updated every day and now contains over 830.000 records.

Record number 104045
Title A contribution to the determination of aflatoxin B1, quinine hydrochloride and L(+)-ascorbic acid in foodstuffs by quantitative in situ thin-layer chromatographic analysis
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[door] P.R. Beljaars
Author(s) Beljaars, P.R.
Publisher Wageningen : Beljaars
Publication year 1974
Description 23 p.
Notes Proefschrift Wageningen
Tutors Pilnik, Prof. Dr. W.
Graduation date 1974-01-10
Dissertation no. 573
Author abstract show abstract

The application of quantitative thin-layer chromatography (TLC) involving in situ spectrodensitometric measurements with a flying-spot densitometer is described in this study for the analysis of aflatoxin B 1 , quinine hydrochloride and L(+)-ascorbic acid (vitamin C) in various food and foodstuffs.

Several aspects dealing with the quantitative analysis of aflatoxin B 1 in peanuts and peanut products were investigated: isolation, thin-layer chromatographic conditions, visual estimations and fluorodensitometric: measurements. The results of this study contributed to the development of the Official method of analysis for aflatoxin B 1 in the Netherlands. A new spotting procedure for aflatoxin assay was introduced ("anti-diagonal" technique) improving the accuracy for visual B 1 estiminations for samples with low contamination levels (0-10 μg/kg).

An in situ fluorodensitometric procedure was developed for the quantitative determination of quinine hydrochloride in soft drinks containing quinine whereas in situ densitometric transmittance measurements were applied for the quantitative determination of L(+)-ascorbic acid (vitamin C) in buttermilk.

It was generally concluded that in situ spectrodensitometric procedures were suitable for quantitative routine determinations in food control work, for specific purposes.

Online full textINTERNET
On paper FORUM ; STACKS ; NN08200,573
FORUM ; STACKS ; NN08202,0573
Keyword(s) (cab) aflatoxins / buttermilk / chemical composition / food inspection / paper chromatography / raw milk / thin layer chromatography / vitamins
Categories Analytical Chemistry
Publication type PhD thesis
Language English
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