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  • 1
    Electronic Resource
    Electronic Resource
    Bilirubin determination in gallstones (1991)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 341 (1991), S. 723-726 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The determination of bilirubin in gallstones is carried out by means of several methods, but most frequently by spectrophotometric determination of azobilirubin. We found that most of the methods were not applicable to bilirubin determination in certain types of gallstones. Thus, we developed a simple and suitable method for bilirubin determination applicable to all gallstone specimens. Based on direct spectrophotometric measurements of chloroform solution of bilirubin or gallstone extracts, our method was found to be sensitive enough to determine small amounts as well as high contents of bilirubin in gallstones. Other gallstone components were of no influence on the assay; thus this method proved to be superior to azobilirubin or other assays.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00321575
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Modification of solids with volatile organics III: Natural zeolites (1990)
    Springer
    Chromatographia 30 (1990), S. 287-292 
    Details
    ISSN: 1612-1112
    Keywords: Gas-solid chromatography ; Natural zeolites — clinoptilolite ; Surface modification ; Adsorption isotherms ; Surface heterogeneity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The effect of pre-adsorbed benzene and ethanol on the adsorptive properties of natural zeolite (clinoptilolite) has been studied by gas-solid chromatography. It has been shown that modification of the solid surface by volatile organics has a significant influence on the adsorptive properties. The modification is of the same order as the more difficult modification by inorganics, as illustrated here by clinoptilolite modification with Co2+. Energy distribution of surface adsorptive sites appears to be continuous and confirms previous finding that only a small proportion of active sites is responsible for most adsorbate retention.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02319709
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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