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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 331 (1988), S. 503-509 
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary An analytical procedure is described, which allows the simultaneous determination of 22 pesticides in drinking, ground and surface water. In case of higher-loaded waters the sample has to be submitted to a clean-up step after CH2Cl2 extraction. The following HPLC is carried out on a Hypersil-column, 3 μm ODS by gradient elution using CH3CN-H2O (phosphate buffer, pH 7) as eluent. The detection of the single components is achieved by a diode-array detector according to their absorption maximal at 220, 230, 245 nm, the verification being supported by comparison of the absorption spectra. As the factor of enrichment is about 1000 a detection limit of 50 μg/l for any pesticide can be obtained. The recovery is higher than 90%.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The fragmentation pattern of metal complexes of 2-butyl-8-hydroxyquinoline depends essentially upon the ability of the metal ion to absorb an electron, i.e. to exist in a stable monovalent form. In this case the main fragment is formed by loss of a molecule of 2-n-butyl-8-hydroxyquinoline, otherwise an ethyl radical is eliminated.
    Notes: Das Fragmentierungsmuster der Metallkomplexe des 2-Butyl-8hydroxychinolins hängt im wesentlichen davon ab, ob das Metall-Ion unter Aufnahme eines Elektrons in eine stabile einwertige Form übergehen kann oder nicht. Im ersten Fall entsteht das Hauptfragment durch Verlust eines Moleküls 2-n-Butyl-8hydroxychinolin, im zweiten durch Abspaltung eines Äthyl radikals.
    Additional Material: 15 Ill.
    Type of Medium: Electronic Resource
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