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  • 1
    ISSN: 1438-2385
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Description / Table of Contents: Zusammenfassung Es wird ein für den Routinebetrieb der Lebensmittelüberwachung geeignetes Bestimmungsverfahren für Deoxynivalenol (DON) und Nivalenol (NV) in Getreideprodukten beschrieben. Die säulenchromatographisch über Florisil gereinigten Extrakte werden mit Heptafluorbuttersäureimidazol (HFBI) derivatisiert und capillargaschromatographisch analysiert. GC-positive Befunde werden durch zweidimensionale Dünnschichtchromatographie überprüft. 67 Getreide und Getreideerzeugnisse des Berliner Marktes wurden untersucht. Die Nachweisgrenze lag, abhängig von der Probenmatrix, für DON bei 20–30 μ/kg und für NV bei 100–300 μg/kg.
    Notes: Summary A method for the analysis of deoxynivalenol (DON) und nivalenol (NV) in cereals is described. This method is suitable for routine use for control purposes. The extract is purified on a florisil column. Derivatization with heptafluorbutyrylimidazole is followed by quantitative determination by means of capillary gas chromatography and electron capture detection (ECD). For verification purposes two-dimensional thin layer chromatography is applied to gc-positive extracts. 67 cereal samples and cereal products from the Berlin market place have been assayed. Depending on the type of sample the limit of detection was 20 to 30 μg/kg for DON, and 100 to 300 μg/kg for NV.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Rheologica acta 3 (1964), S. 238-244 
    ISSN: 1435-1528
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    European food research and technology 187 (1988), S. 250-250 
    ISSN: 1438-2385
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1438-2385
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Description / Table of Contents: Zusammenfassung Lebensmittel, die im Emissionsbereich Chemischer Reinigungen gelagert bzw. verkauft werden, können erheblich mit Tetrachlorethen belastet sein. Hohe Tetrachlorethengehalte wurden sowohl in Lebensmittelproben aus über Chemischen Reinigungen gelegenen Wohnungen als auch in Proben aus dem Lebensmitteleinzelhandel festgestellt. Lebensmittel mit hohem Fettgehalt wiesen stets die höchsten Kontaminationen auf.
    Notes: Summary Tetrachloroethene (perchloroethylene) from dry-cleaning units may contaminate adjacent flats in the same building. Increased concentrations of tetrachloroethene have been found in foodstuffs in homes situated above dry cleaning units and in foodstuffs from groceries located neat drycleaning units. The concentrations were extremely high in foods rich in fat.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    European food research and technology 177 (1983), S. 447-453 
    ISSN: 1438-2385
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Description / Table of Contents: Zusammenfassung Es wird eine Phasenumkehr-HPLC-Methode beschrieben, die es gestattet, dieAlternaria-Toxine Alternariol (AOH), Alternariolmonomethylether (AME), Altenuen (ALT) und Altertoxin I (ATX-I) in Obst- und Gemüseerzeugnissen mit guter Empfindlichkeit zu bestimmen. Die Ergebnisse werden dünnschichtchromatographisch abgesichert. Sie wurde an ca. 50 Handelsprodukten Bowie an ca. 20 verschimmelten Früchten erprobt. Keines der Handelsprodukte war mit den o. g. Mykotoxinen kontaminiert, während zwei der verschimmelten Proben (Äpfel) 160 ppb AOH, bzw. 250 ppb AME enthielten.
    Notes: Summary A reverse phase HPLC method for the determination of theAlternaria mycotoxins alternariol (AOH), alternariol monomethyl ether (AME), altenuene (ALT) and altertoxin I (ATX-I) in fruit and vegetable products is described. The procedure has good sensitivity. The results are corroborated by TLC. About 50 commercial products and about 20 mouldy fruits were analysed. None of the commercial products was contaminated with the toxins whereas two of the mouldy samples (apples) contained 160 ppb AOH respectively 250 ppb AME.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    European food research and technology 186 (1988), S. 108-113 
    ISSN: 1438-2385
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Description / Table of Contents: Zusammenfassung Es wurde eine für die Routineanalytik geeignete Methode zur Bestimmung der Mutterkornalkaloide Ergometrin, Ergometrinin, Ergosin, Ergosinin, Ergotamin, Ergotaminin, Ergocornin, Ergocorninin, α-Ergokryptin, α-Ergokryptinin,β-Ergokryptin,β-Ergokryptinin, Ergocristin und Ergocristinin in Getreideprodukten entwickelt. Die Methode besteht aus der Extraktion des Lebensmittels, der Reinigung des Rohextraktes mit einer modifizierten Form des Extrelut-Verfahrens und der Identifizierung und quantitativen Bestimmung der Alkaloide mittels HPLC. Zur Absicherung der qualitativen Ergebnisse wurden DC und GC/MS hinzugezogen. Marktuntersuchungen zeigten Kontaminationen sowohl bei alternativen als auch bei herkömmlichen Produkten, wobei der Befall bei Roggenerzeugnissen überwiegt. Die gemessenen Werte lassen indes erkennen, daß in keinem Falle die in der Europäischen Gemeinschaft geltende Interventionsgrenze von 0,05% Mutterkorn entsprechend 1 mg/kg Gesamtalkaloide erreicht wurde.
    Notes: Summary A suitable method has been developed for the routine analysis of the ergot alkaloids ergometrine, ergometrinine, ergosine, ergosinine, ergotamine, ergotaminine, ergocornine, ergocorninine, α-ergocryptine, α-ergocryptinine,β-ergocryptine,β-ergocryptinine, ergocristine and ergocristinine in cereal products. The method consists of food extraction, cleaning of the crude extract by a modified form of the Extrelut method, and identification and quantitative determination of the alkaloids by high pressure liquid chromatography (HPLC). The results are confirmed by thin layer chromatography (TLC) and gaschromatography/mass spectrometry (GC/MS). Market investigations have shown contaminations in ecological as well as in conventional products, with rye products mainly being contaminated. Within the EEC, a maximum value of 0.05% ergot respectively a total alkaloid content of 1 mg/kg in cereals used for food production is prescribed. This value was not exceeded in any of the investigated samples.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    European food research and technology 180 (1985), S. 230-233 
    ISSN: 1438-2385
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Description / Table of Contents: Zusammenfassung Es wird eine Methode zur Bestimmung von 5-Methoxypsoralen in Sonnenschutzmitteln beschrieben. Nach säulenchromatographischer Reinigung wird der Extrakt mittels zweidimensionaler Dünnschichtchromatographie untersucht. Bei positiven Befunden wird das 5-Methoxypsoralen capillar-gaschromatographisch unter Verwendung von 5-α-Cholestan als innerem Standard quantitativ bestimmt. Die Ergebnisse werden durch Gaschromatographie-Massenspektrometrie (GC-MS) abgesichert. Die Wiederfindungsrate beträgt bei Kosmetika vom Emulsionstyp 70% und bei Sonnenölpräparaten 90%. Die Nachweisgrenze liegt je nach Probenart, zwischen 0,1 und 0,5 mg/kg. Mit dieser Methode wurden in 6 von 21 untersuchten Sonnenschutzmitteln bis zu 28 mg 5-Methoxypsoralen/kg nachgewiesen.
    Notes: Summary A method for the determination of 5-methoxypsoralene in suntan-cosmetics is described. After liquid chromatographic clean-up, the final extract is screened by twodimensional thin layer chromatography. For positive extracts 5-methoxypsoralene is analysed quantitatively by capillary gas chromatography, using 5-α-cholestane as an internal standard and flame ionization detection (FID). The results were confirmed by gas chromatography-mass spectrometry (GC-MS). The recoveries for suntan-cosmetics of emulsion type were 70% and for tanning oils 90%. Detection limits of the method were 0,1 to 0,5 mg/kg, depending on the sample type. By application of this method 5-methoxypsoralene was detected in 6 of the 21 cosmetic products at levels up to 28 mg/kg.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 2 (1923), S. 552-554 
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 7 (1928), S. 2306-2308 
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Naturwissenschaften 53 (1966), S. 251-251 
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
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