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  • Analytical Chemistry and Spectroscopy  (7)
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  • Analytical Chemistry and Spectroscopy  (7)
  • Chemistry  (7)
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  • 1
    Electronic Resource
    Electronic Resource
    Mass spectrometry of domoic acid, a marine neurotoxinNRCC No. 29369. (1989)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 18 (1989), S. 373-386 
    Details
    ISSN: 0887-6134
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Domoic acid is a naturally occurring amino acid, formerly available in limited amounts as a natural product of some algae of the family Rhodomelaceae. As the result of a recent incidence of toxicity in cultured blue mussels (Mytilus edulis) from a highly localized region of Atlantic Canada, useful amounts of this substance are likely to become available in the near future. Domoic acid is an important substance for fundamental studies in neurobiology as it possesses the highest affinity amongst known substances for the kainate receptors of the central nervous system. The present work describes fast atom bombardment (FAB) mass spectra of domoic acid, and of some of its isomers present in minor quantities in contaminated mussel extracts. These FAB spectra are subject to interferences from beam-inducced reduction reactions associated with matrices such as glycerol, but not with others such as 3-nitrobenzyl alcohol. Tandem mass spectrometry of the MH+ ions from these compounds is also reported. As a more feasible approach to quantitative analysis at trace levels, formation of the volatile tert-butyldimethylsilyl derivatives has been investigated and shown to be highly promising.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bms.1200180604
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    A comparison of chromatographic and chromatographic/mass spectrometric techniques for the determination of polycyclic aromatic hydrocarbons in marine sedimentsNRCC No. 26728. (1987)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 14 (1987), S. 375-381 
    Details
    ISSN: 0887-6134
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The establishment of reliable values for concentrations of 16 priority pollutant polycyclic aromatic hydrocarbons (PAH) in a suite of marine sediment reference materials included an examination of the methods used to determine such compounds. Results from the five techniques used indicate large method biases. The biases arise from chemical interferences in methods which use non-selective measuring systems with separation techniques which do not first completely resolve the analytes; e.g., single-parameter optical detectors with high performance liquid chromatographic (HPLC) techniques or a flame ionisation detector (FID) with capillary column gas chromatographic (GC) methods. Measurement by a mass spectrometer with HPLC and GC removes much of the method bias. Results for a representative sediment are discussed to illustrate these conclusions.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bms.1200140805
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Analysis of polycyclic aromatic compounds by supercritical fluid charomatography/mass spectrometry using atmospheric-pressure chemical ionizationNRCC #31956. (1991)
    New York, NY : Wiley-Blackwell
    Rapid Communications in Mass Spectrometry 5 (1991), S. 149-155 
    Details
    ISSN: 0951-4198
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: The development of microbore packet-column supercritical fluid chromatography/atmospheric pressure chemical ionization mass spectrometry (SFC/APCI-MS) for the analysis of polycyclic aromatic compounds (PAC) is described. The SFC system was coupled to the mass spectrometer using an improved interface designed to accommodate commercially available fused silica restrictors. The atmospheric pressure chemical ionization characteristics of PAC are discussed and the use of chemical ionization reagents to modify the type of spectra obtained is described. With selected-ion monitoring techniques the interface provided detection limits in the low picogram range for individual PAC standards. Using a photoionization detector for the off-line optimization of chromatographic conditions, SFC/APCI-MS was applied to the analysis of complex mixtures of PAC in coal tar and tar sand oil extracts. Tandem mass spectrometry was used to provide structural information.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/rcm.1290050403
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  • 4
    Electronic Resource
    Electronic Resource
    Ion-spray mass spectrometry of marine toxins II. Analysis of diarrhetic shellfish toxins in plankton by liquid chromatography/mass spectrometryNRCC No. 31309. (1990)
    New York, NY : Wiley-Blackwell
    Rapid Communications in Mass Spectrometry 4 (1990), S. 206-213 
    Details
    ISSN: 0951-4198
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: A combined liquid chromatography/mass spectrometry (LC/MS) method using ion-spray ionization is described for the sensitive determination of okadaic acid and dinophysistoxin-1, the principal toxins implicated in cases of diarrhetic shellfish poisoning. The method is used to confirm the presence of okadaic acid in a culture of the dinoflagellate species Prorocentrum concavum and in natural populations of dinoflagellates from eastern Canadian waters. Several analogues of the toxin have also been detected. Quantitative results are comparable to those obtained by high performance liquid chromatography with fluorescence detection. With slight modifications, the LC/MS method is also used to analyse the fluorescent anthrylmethyl ester of okadaic acid. Preliminary tandem mass spectrometric results, obtained using fast-atom bombardment ionization, are presented for okadaic acid.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/rcm.1290040608
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  • 5
    Electronic Resource
    Electronic Resource
    Separation and characterization of isomeric substituted nucleosides by gas chromatography and mass spectrometryAbbreviations used: TMS (trimethylsilyl); TFA (trifluoroacetyl); TBDMS (t-butyldimethylsilyl). (1974)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 1 (1974), S. 78-79 
    Details
    ISSN: 1052-9306
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The 3′- and 5′-O-t-butyldimethylsilyl derivatives of thymidine and deoxyadenosine have characteristically different mass spectra and can be separated by gas chromatography.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bms.1200010116
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  • 6
    Electronic Resource
    Electronic Resource
    Identification of polycyclic aromatic compounds in mutagenic emissions from steel casting (1985)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 12 (1985), S. 143-150 
    Details
    ISSN: 1052-9306
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Workers in ferrous foundries show increased risk of lung cancer. In the steel casting process hot metal is poured into sand moulds solidified with organic binders, producing a plume of smoke containing a variety of organic compounds and showing strong mutagenicity in the Salmonella/S9 assay. We have collected the emissions produced when steel is poured into an experimental sand mould solidified with oil, clay and cereal, a widely used binder system. The organic constituents of these emissions have been fractionated by preparative reverse-phase high perfomance liquid chromatography (HPLC) and mutagenic fractions have been analysed by capillary column gas chromatography/mass spectrometry (GC/MS). Of the 65 compounds for which mass spectra are reported, 54 have been tentatively identified as alkyl derivatives of polycyclic aromatic compounds. Many compounds of this class are known to be carcinogenic and mutagenic. In addition, several unsubstituted polycyclic aromatic hydrocarbons, including the carcinogenic benz[a]anthracene and benzo[a]pyrene, were found to be present.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bms.1200120402
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  • 7
    Electronic Resource
    Electronic Resource
    Charge-transfer ionspray liquid chromatography/mass spectrometry analyses of fullerenes and related compounds from flame-generated materialsNRCC No. 34830. (1993)
    New York, NY : Wiley-Blackwell
    Rapid Communications in Mass Spectrometry 7 (1993), S. 229-234 
    Details
    ISSN: 0951-4198
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: A flame-generated, fullerene-rich material (J. B. Howard et al., Nature 352, 139 (1991)) has been characterized by liquid chromatography coupled on-line to ionspray mass spectrometry. Charge-transfer complexation, using a post-column addition of either an electron donor or acceptor, was utilized as a pre-ionization technique. Analyses in the positive-ion mode showed that the thermally metastable constituents of the flame-generated material, tentatively identified previously (J. F. Anacleto et al., Rapid Commun. Mass Spectrom. 6, 214 (1992)) as fullerene isomers on the basis of atmospheric pressure chemical ionization muss spectrometry, yielded mass spectra consistent with their identification as fullerene adducts with highly uiuaturated moieties CnH2n-4 with n = 5, 6, and 7. The molecular radical cations of these adduct species were susceptible to facile fragmentation yielding the molecular ions of the corresponding fullerenes. The negative-ion mode experiments failed to provide any information regarding the identity of these metastable constituents.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/rcm.1290070313
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