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  • Chemistry  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Analysis of chlorinated organic compounds in estuarine biota and sediments by chemical ionization tandem mass spectrometry (1989)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 18 (1989), S. 464-470 
    Details
    ISSN: 0887-6134
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Complex sample matrices of estuarine biota tissue and bed sediment extracts were analyzed for selected chlorinated compounds. By using gas chromatography/positive chemical ionization/tandem mass spectrometry, the coeluting interferences present in gas chromatography/electron ionization mass spectrometry were eliminated in the biota tissue and bed sediment extracts. The selected chlorinated compounds included chlorobenzene; 1,2-, 1,3- and 1,4-dichlorobenzene; 1,2,3-, 1,2,4- and 1,3,5-trichlorobenzene; 1,2,3,4-, 1,2,3,5- and 1,2,4,5-tetrachlorobenzene; pentachlorobenzene; hexachlorobenzene; hexachloro-1,3-butadiene; octachlorostyrene; and octachloronaphthalene. Daughter ion spectra for these compounds are included. The detection limit for most of the compounds was 20 pg, and the instrument response was linear over five orders of magnitude, by using 13C-labelled hexachlorobenzene as the internal standard.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bms.1200180704
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  • 2
    Electronic Resource
    Electronic Resource
    Determination of herbicides and their degradation products in surface waters by gas chromatography/positive chemical ionization/tandem mass spectrometry (1989)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 18 (1989), S. 820-827 
    Details
    ISSN: 0887-6134
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A rapid, sensitive and specific method was developed for the analysis of selected herbicides and their degradation products in surface water samples using gas chromatography/positive chemical ionization/tandem mass spectrometry (GC/PCI/MS/MS). Compounds included atrazine and its degradation products (deethylatrazine and deisopropylatrazine), simazine, alachlor and its degradation products (2-chloro-2′,6′-diethylacetanilide, 2-hydroxy-2′,6′-diethylacetanilide and 2,6-diethylaniline) and metolachlor. Daughter ion spectra for the protonated molecule of these compounds were generated and are described. The coeluting interferences present using GC/electron impact mass spectrometry in the surface water samples were eliminated by using GC/PCI/MS/MS in the neutral loss mode to detect specific daughter ions. The detection limit for most of the compounds was 200 pg, and instrument response was linear over three orders of magnitude.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bms.1200180928
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    Paper (German National Licenses)
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