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  • 1
    ISSN: 1612-1112
    Keywords: Capillary electrophoresis ; Ion chromatography ; Carbon disulphide in air ; Alkyl xanthogenates
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A simple and sensitive method is presented for the measurement of carbon disulphide in air without interference from other gaseous sulphides. The procedure is based on the collection of CS2 in an ethanolic solution of KOH, where it is converted to potassium ethyl xanthogenate (PEX). The latter is determined by high-performance ion chromatography (HPIC) and/or capillary zone electrophoresis (CZE). Laboratory and field determination of detection limit, reproducibility and linearity, and specific advantages over other gas chromatographic and wet chemical methods, are discussed. Quantitative measurements of CS2 in air can be performed after sampling for 1 h with limits of detection as low as 15 ppb by HPIC and ca 0.1 ppm by CZE.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0935-6304
    Keywords: Capillary GC ; Nitrofluoranthenes ; Nitropyrenes ; Diesel exhaust ; Urban particulate matter ; Industrial emission ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A 15 m DB-17 fused-silica capillary column has been used to achieve the separation of all mononitrofluorarthene and mononitropyrene isomers. Linear Retention Indices and Relative Retention times for each component have been measured and the values were compared with those observed on DB-5 columns, commonly used for this separation. Increased polarity of the liquid phase results in better separation of some key isomeric pairs (such as 2-, 3-nitrofluoranthene and 1-nitropyrene, 8-nitrofluoranthene), difficult to resolve on DB-5 columns. Practical applications are reported. They include the analysis of extracts from emission samples (diesel exhaust and particles emitted by a factory manufacturing carbon electrodes) as well as atmospheric dust sampled in a urban area under different conditions.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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