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  • 1
    Electronic Resource
    Electronic Resource
    Separation of homologous fatty acids by capillary electrophoresis (1994)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Microcolumn Separations 6 (1994), S. 565-570 
    Details
    ISSN: 1040-7685
    Keywords: capillary electrophoresis ; fatty acids ; reversed EOF ; indirect UV detection ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Capillary electrophoretic methods with normal and reversed electroosmotic flows (EOF) and indirect UV detection were developed for the separation of fatty acids. Rapid separation of acids up to C12 was achieved via reversed EOF using 30% acetone, a cationic surfactant and 3,5-dinitrobenzoic acid as carrier electrolyte. Analysis of acids up to C18 was feasible by normal EOF with 60% acetonitrile and trinitrobenzenesulfonic acid as carrier. Also investigated was the influence of the concentration of various organic solvents on the magnitude and direction of the EOF and on the solubility of the fatty acid solutes. The reversed EOF method was applied to the analysis of acids in fat hydrolysates.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mcs.1220060606
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    First Fourier-transform ion cyclotron resonance signals of very highly charged atomic ionsContribution from the 2nd European FTMS Workshop, Antwerp, Belgium, September 1993. (1994)
    New York, NY : Wiley-Blackwell
    Rapid Communications in Mass Spectrometry 8 (1994), S. 141-143 
    Details
    ISSN: 0951-4198
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: We report on the first application of Fourier-transform ion cyclotron resonance mass spectrometry to the very highly charged ions produced in the high-energy electron beam ion trap (SuperEBIT) at the Lawrence Livermore National Laboratory. Initial results are described, and spectra are presented from ions as highly charged as Cs53+.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/rcm.1290080202
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Carbon-13 NMR chemical shifts of 1-alkyl-3(5)-cyano-1H-pyrazole-4-carboxylic acid esters (1990)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 28 (1990), S. 90-92 
    Details
    ISSN: 0749-1581
    Keywords: 13C NMR 1-Alkyl-3(5)-cyano-1H-pyrazole-4-carboxylic ; acid ; esters ; Isomer differentiation ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A compilation of 13C NMR chemical shifts for 13 pairs of 3- and 5-cyano-substituted pyrazole regioisomers is reported. All of the ring carbon and cyano carbon 13C chemical shifts show a regular, predictable correlation with the particular isomer, whether 3-cyano or 5-cyano. These shifts occurred in very narrow ranges, precluding any confusion of assignment within the group of compounds studied. x-ray crystallographic analysis was performed on one of the samples.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260280117
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Process analysis of electroless nickel deposition baths by Raman spectroscopy (1994)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 25 (1994), S. 31-41 
    Details
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: In a test experiment carried out in a small compact electroless plating facility, the concentrations of hypophosphite and phosphite in a nickel deposition bath of the Kanigen type were monitored on-line with a dispersive Raman spectrometer. From the results, which agreed with off-line Fourier transform (FT) IR data within ca. 10%, the molar amounts of nickel, hypophosphite and phosphite consumed and formed were calculated and compared with the stoichiometry of the nickel plating process adopted. In addition, nickel bath samples were also measured with an FT Raman spectrometer to compare the performances of both Raman techniques with a view to their application to aqueous solutions.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jrs.1250250106
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    Paper (German National Licenses)
    Fulltext
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