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  • 1
    Electronic Resource
    Electronic Resource
    Thin layer chromatography/densitometry with transferable calibration factors (1976)
    s.l. : American Chemical Society
    Analytical chemistry 48 (1976), S. 50-54 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac60365a056
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Properties of silver-loaded silica gel supports for liquid chromatography (1976)
    s.l. : American Chemical Society
    Analytical chemistry 48 (1976), S. 2-7 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac60365a029
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Dynamic slurry-packing technique for liquid chromatography columns (1977)
    s.l. : American Chemical Society
    Analytical chemistry 49 (1977), S. 1958-1963 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac50021a018
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Determination of fluorine in boron-containing materials with a fluoride sensitive electrode (1975)
    Springer
    Microchimica acta 63 (1975), S. 219-222 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Mikrobestimmung von Fluor in organischem Material nach Kolbenverbrennung mit Hilfe einer fluoridspezifischen Elektrode ist eine eingeführte Methode. Störungen infolge Komplexierung des Fluoridions können auftreten, wenn die Probe Bor oder Fluorborat enthält. Die vorliegende Arbeit beschreibt eine Methode, um diese Komplexbildung durch Verbrennung in der Knallgasflamme und Absorption des H2F2 in Alkalilauge zu vermeiden. Einige Analysenergebnisse pharmazeutischen Materials werden angeführt.
    Notes: Summary The fluoride-ion selective micro-determination of fluorine in organic materials after closed flask combustion is an established technique. Interferences, due to complexation of the fluoride ion can occur, if the sample contains boron or fluorborate ion. This paper describes a method that avoids complexation of fluoride by combustion in a hydrogen-oxygen flame and absorption of the resulting H2F2 in alkali hydroxide solution. By this method, samples can be analyzed for fluorine without interference by boron. Some results of the analysis of pharmaceutical materials are given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01218609
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Derivatization in modern liquid chromatography (1975)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 277 (1975), S. 303-310 
    Details
    ISSN: 1618-2650
    Keywords: Chromatographie, Säulen ; Reaktions-Flüssigkeits-Chromatographie, Methoden, Anwendbarkeit
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary Advantages and disadvantages of derivatization-liquid chromatography are discussed. Distinction is made between pre-column and post-column techniques. Ion-pair chromatography is classified as a special form of pre-column technique. Some background aspects are mentioned briefly. The usefulnes of reaction chromatography is demonstrated with practical examples in pharmaceutical, clinical and environmental analytical areas. Extension of this approach to mass spectroscopy is also included.
    Notes: Zusammenfassung Die Vor- und Nachteile der Reaktions-Flüssigkeits-Chromatographie werden diskutiert. Es wird zwischen Derivatisierungsverfahren vor und nach der Säule unterschieden. Ionenpaar-Chromatographie wird als eine besondere Form der Reaktions-Chromatographie vor der Säule betrachtet. Einige Grundlagenaspekte sind kurz erörtert. Die Anwendbarkeit dieser Methoden wird anhand pharmazeutischer, klinischer und umweltchemischer Analysenbeispiele vorgeführt. Möglichkeiten der Strukturaufklärung über eine Kombination der Reaktions-Chromatographie und der Massenspektroskopie sind erwähnt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00438286
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    A comparison of different HPLC detector designs based on the dropping mercury electrode principle (1979)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 297 (1979), S. 404-410 
    Details
    ISSN: 1618-2650
    Keywords: Chromatographie, HPLC ; Vergleich von Detektoren auf Basis Hg-Tropfelektrode
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary Different designs of dropping-mercury electrode (DME) detectors for HPLC were tested and compared to solid-state and UV detectors. The time constants and the corresponding response volumes were measured. A qualitative explanation for the flow pattern of these cells was attempted. With nitrobenzene as a test substance the detection limits and reproducibilities of the best DME detectors were comparable to those of a good UV detector. The linear dynamic ranges and response times for optimally designed electroanalytical cells are better than for UV detectors.
    Notes: Zusammenfassung Vergleiche zwischen diesen Detektoren sowie einem Festkörperelektroden und einem UV-Detektorentyp wurden angestellt. Zeitkonstanten und Detektionsvolumen wurden gemessen und eine Erklärung für die Flußprofile gegeben. Die mit Nitrobenzol gemessenen Detektionsgrenzen und Reproduzierbarkeiten der besten Typen sind vergleichbar mit denen von guten UV-Detektoren. Der dynamisch lineare Bereich und die Ansprechzeit sind für optimal gebaute elektro-analytische Detektoren deutlich besser als für UV-Detektoren.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00480898
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    An HPLC fluorescence detection system for amines (1979)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 2 (1979), S. 11-14 
    Details
    ISSN: 0935-6304
    Keywords: Liquid chromatography ; Fluorescence ; Ion-pair extraction ; Amines ; Post-column reaction ; Auto-analyser ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A detection system is described which is based on fluorescent ion-pair formation between tertiary amine drugs and dimethoxyanthracene sulphonate. A dynamic micro-extraction principle is then used to isolate the ion-pairs from the excess reagent. The band broadening of this extraction detector was kept below 20% using standard auto-analyser equipment. With the enhanced selectivity and sensitivity of this approach it was possible to analyse chloropheniramine in urine at ppb concentrations using a pre-column clean-up trace enrichment step.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240020106
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    Paper (German National Licenses)
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