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  • Analytical Chemistry and Spectroscopy  (901)
  • AERODYNAMICS  (569)
  • 1985-1989  (1,470)
  • 1980-1984
  • 1985  (1,470)
Collection
Keywords
Publisher
Years
  • 1985-1989  (1,470)
  • 1980-1984
Year
  • 1
    Electronic Resource
    Electronic Resource
    Quantitation of urapidil and its metabolites in human serum by high performance liquid chromatography (1985)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 8 (1985), S. 224-229 
    Details
    ISSN: 0935-6304
    Keywords: Liquid chromatography, HPLC ; Pharmacokinetics ; Quantitation in human serum ; Antihypertensive agents ; Ebrantil ; Urapidil ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The antihypertensive agent urapidil (Ebrantil Byk-Gulden, Konstanz) can be reliably quantitated with three metabolites in human serum using high performance liquid chromatography. Serum is alkalinized and extracted with ethyl acetate. The organic phase is back-extracted with diluted acid. An aliquot is sampled automatically and chromatographed in an optimized combination of mobile and stationary phase. UV-detection at 273 nm allows a quantitation limit of 5 ng/ml for all analytes. Precise handling of exact volumes facilitates external calibration. The coefficient of variation for spiked samples is less than 5% within and less than 7% between studies. Application of the method to experimental and clinical pharmacokinetic studies of urapidil is illustrated.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240080503
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  • 2
    Electronic Resource
    Electronic Resource
    Non-aqueous ion exchange chromatography, an alternative to buffered silica gel (1985)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 8 (1985), S. 256-258 
    Details
    ISSN: 0935-6304
    Keywords: Liquid chromatography, HPLC ; Non-aqueous ion exchange ; Abietanoic diterpenoids ; Coleons, royleanones ; Quinone methides, hydroxyquinones ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A method is described for the HPLC separation of moderately acidic, dehydrated, and multi-oxygenated diterpenoids, compounds which hitherto could not be handled by HPLC. It is based on chemically bonded silica strong cation exchangers in the protonated form, using organic solvents of the full polarity range as eluents. Thus a stable and easy-to-regenerate substitute for buffered silica gel is obtained.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240080507
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  • 3
    Electronic Resource
    Electronic Resource
    Contemporary practice of chromatography. C. F. Poole and S. A. Schuette, Elsevier Science Publishers, Amsterdam, New York, 708 pp., $61.25, 1984 (1985)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 8 (1985), S. 320-320 
    Details
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240080616
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  • 4
    Electronic Resource
    Electronic Resource
    Cold trap/reinjection interface for two-dimensional gas chromatography (1985)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 8 (1985), S. 332-336 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography, GC ; Fused silica capillary columns ; Packed columns ; Two-dimensional system ; Multidimensional system ; Deans switching ; Cold trap ; Reinjection ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The construction and evaluation of an interface for two-dimensional gas chromatography is described. The interface consists of commercially available components and is attachable to available gas chromatographs without any major modifications. The interface has been constructed so as to permit “heartcutting” as well as solute band concentration. Trapping is performed in a simple cold trap of fused silica. Flow switching is accomplished by Deans switching. Factors of the over-all chromatographic performance are examined.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240080703
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  • 5
    Electronic Resource
    Electronic Resource
    Assessment of the results from data processing systems using a digital chromatogram simulator (1985)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 8 (1985), S. 347-355 
    Details
    ISSN: 0935-6304
    Keywords: Simulation of chromatograms ; Data processing ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A digital chromatogram simulator has been used to evaluate the performance of data handling systems. The simulator can synthesize chromatograms with any desired shape from a library of peaks based on real peak shapes. Once generated, the chromatograms can be reproduced exactly any number of times.The algorithms used in data handling systems have a significant effect on the results they produce. An object of this work was to examine how well the true size of a peak was reported when the peak was detected overlapping with other peaks. A series of experiments was therefore performed in which peaks were overlapped by different amounts and in different situations. The reported results from the data systems were compared with the results which would have been reported had the peaks been fully resolved. A significant difference was found between the overlap results and the fully resolved results, which did not have a linear relationship with the parameters tested.The chromatogram simulator was found to be a powerful tool in assessing the performance of the data systems. It offers a valuable means of evaluating the quality of the results produced by these systems.
    Additional Material: 16 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240080706
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  • 6
    Electronic Resource
    Electronic Resource
    Modern liquid chromatography of Macromolecules. B. G. Belenkii and L. Z. Vilenchik, Elsevier, 432 pp (1985)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 8 (1985), S. 369-369 
    Details
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240080712
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  • 7
    Electronic Resource
    Electronic Resource
    HPTLC separation and determination of cobalt, copper and nickel as diethyldithiocarbamates (1985)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 8 (1985), S. 366-367 
    Details
    ISSN: 0935-6304
    Keywords: Thin-layer chromatography, HPTLC ; Quantitative analysis ; Metallic complexes ; Diethyldithiocarbomates ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240080711
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  • 8
    Electronic Resource
    Electronic Resource
    Column switching applied to capillary gas chromatography/fourier transform infrared spectroscopy (1985)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 8 (1985), S. 385-387 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography, GC ; Fused silica capillary columns ; Column switching ; Fourier transform infrared spectroscopy ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A dual oven gas chromatograph incorporating a micro, mechanical switching valve has been interfaced to an FTIR spectrometer. With this system, each oven can be operated with independent temperature control. Complete choice of the columns' type and capacity gives flexibility in the separation prior to spectroscopic evaluation. An application which demonstrates some of the advantages of column switching in GC/FTIR is presented. Minor sample components have been successfully analyzed by heart-cutting the appropriate section of the separation from a high to a low capacity column. In this way, the dynamic range of the technique is effectively increased while an efficient chromatographic inlet to the FTIR is maintained.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240080804
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  • 9
    Electronic Resource
    Electronic Resource
    Total steroid profiling with capillary GC. Details on sample preparation (1985)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 8 (1985), S. 400-403 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography, GC ; Capillary columns, FSOT ; Steroid profiling ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The accuracy and reproducibility of steroid and steroid conjugate determinations using capillary GC are evaluated. It is possible to analyze many unconjugated steroids, steroid sulfates, and some steroid glucuronides simultaneously, simply by using group fractionation based on successive hydrolysis and solvent extraction steps. However, a reliable determination of corticosteroid glucuronides can only be obtained after previous isolation of the glucuronides as a group, with ion exchange chromatography. In complex chromatograms, the combined use of nitrogen specific detection and flame ionization detection facilitates peak identification.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240080808
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  • 10
    Electronic Resource
    Electronic Resource
    Capillary GC of triglycerides in fats and oils using a high temperature phenylmethylsilicone stationary phase, part I (1985)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 8 (1985), S. 415-422 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Fused silica capillaries ; High-temperature phases ; Triglyceride analysis ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The analysis of triglycerides on FSOT columns coated with a phenylmethylsilicone gum opens up new perspectives in fat and oil characterization. On phenylmethylsilicone, besides a “carbon number” or CN separation, the triglycerides are also separated according to the different combinations of saturated and unsaturated fatty acids in the triglycerides.
    Additional Material: 20 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240080812
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