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  • 1
    Electronic Resource
    Electronic Resource
    The UK National Marine Analytical Quality Control Scheme (1997)
    Springer
    Accreditation and quality assurance 2 (1997), S. 294-300 
    Details
    ISSN: 1432-0517
    Keywords: Key words Analytical quality control ; Marine monitoring ; Accuracy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract  The approach to analytical quality control adopted for the UK National Marine Analytical Quality Control Scheme is described. The Scheme began in 1991 and is in its fifth year of operation. The aim of the programme of work is to ensure adequate control over the accuracy of analysis, such that the aims of the UK National Marine Monitoring Plan are satisfied. The results of interlaboratory tests for the determination of nutrients in water samples and metals, organic compounds in waters, sediments and biological samples are summarised.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s007690050151
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Accuracy of determination of trace metals in soil and sewage sludge (1996)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 354 (1996), S. 596-601 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Errors in the analysis of liquid samples are often large enough to be important. For solid materials, additional potential complications arise in separating the determinand from the sample matrix and in controlling possible interferences from co-extracted species. These considerations have led to the development of a stepwise, co-ordinated approach by which a group of laboratories have achieved predefined standards of accuracy. Sample digestion has been examined. The analysis of digests has then been addressed; the control of analytical precision has been emphasised. Finally, a demonstration of overall comparability has been undertaken. The results are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s0021663540596
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Determination of chromium(III) and total chromium in marine waters (1996)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 354 (1996), S. 602-605 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The development of an analytical technique is described which may be used to determine chromium, chromium(III) and chromium(VI) in estuarine and coastal waters. The method is based on selective micro-solvent extraction with subsequent GFAAS. The technique has been applied in a major North Sea estuary. The results obtained confirm that thermodynamic factors alone cannot be relied upon to describe the form of chromium in estuaries. Kinetic factors appear to have a strong influence over speciation and lead to the persistence of Cr(III) species in environments where Cr(VI) would be expected to be present.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s0021663540602
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    Paper (German National Licenses)
    Fulltext
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