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  • 1
    Electronic Resource
    Electronic Resource
    On the analysis of polar solutes on 50 μm i.d. open tubular LC columns (1994)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 17 (1994), S. 557-559 
    Details
    ISSN: 0935-6304
    Keywords: Open tubular liquid chromatography (OTLC) ; Inertness ; Protein analysis ; Ultraviolet detection ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240170712
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  • 2
    Electronic Resource
    Electronic Resource
    Temperature optimization for the separation of PAHs on micropacked LC ODS columns (1993)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 16 (1993), S. 605-608 
    Details
    ISSN: 0935-6304
    Keywords: Micropacked liquid chromatography ; ODS stationary phases ; Temperature optimization ; Polycyclic aromatic hydrocarbons ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The effect of column temperature on the separation of the sixteen polycyclic aromatic hydrocarbons (PAHs) of mixture SRM 1647a of the US Environmental Protection Agency has been studied on different micropacked ODS columns. Isothermal temperature optimization was successfully used for complete separation of the PAHs on a polymeric ODS stationary phase, whereas temperature programmed conditions were selected for separation on a monomeric ODS stationary phase.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240161008
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  • 3
    Electronic Resource
    Electronic Resource
    Micro LC on cellulose triacetate (CTA): Influence of particle diameter and column temperaturePresented at the 15th International Symposium on Capillary Chromatography, Riva del Garda, Italy, May 1993. (1995)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Microcolumn Separations 7 (1995), S. 259-263 
    Details
    ISSN: 1040-7685
    Keywords: micro LC ; cellulose triacetate (CTA) ; separation of enantiomers ; particle diameter ; column temperature ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Fused silica columns (320 μm i.d.) were packed with 10 μm, 15-25 μm, and 25-40 μm microcrystalline cellulose triacetate (CTA) and the influence of the particle diameter on column efficiency was investigated. The dependence of retention, selectivity, resolution, and analysis time on column temperature was studied for the separation of several racemates on microcolumns packed with 15-25 μm CTA. © 1995 John Wiley & Sons, Inc.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mcs.1220070310
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  • 4
    Electronic Resource
    Electronic Resource
    Preparation of small diameter thick film capillary columns for microcolumn separations (1994)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Microcolumn Separations 6 (1994), S. 361-367 
    Details
    ISSN: 1040-7685
    Keywords: capillary columns ; small diameter ; thick films ; static coating ; speed of filling ; speed of evaporation ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Open tubular columns of 25 and 50 μm i.d. have been coated with up to 2 μm thick layers of SE-54 (lowest β-value = 6.25). Filling of the columns and evaporation of the solvent were studied as a function of column length and time. Since the viscosity of the stationary phase solution increases exponentially with concentration, the filling process becomes time consuming and high filling pressures are required. The evaporation or coating speed is shown to be controlled by the resistance to mass transfer of the solvent vapor through the coated sections of the column. For 25 and 50 μm i.d. columns, experimental evaporation times deviate little from theoretical predictions. Almost no influence of the stationary phase on the coating speed was observed. The transition from mass transfer limited coating speed to heat transfer limited coating speed is illustrated using literature data.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mcs.1220060404
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  • 5
    Electronic Resource
    Electronic Resource
    Capillary GC on 50 micrometer I.D. Columns coated with thick films. Theory and selected practical results (1995)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 18 (1995), S. 77-82 
    Details
    ISSN: 0935-6304
    Keywords: Capillary gas chromatography ; Film thickness ; Pressure drop ; Speed of analysis ; Applications ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The chromatographic performance of 50 μm internal diameter (i.d.) fused silica columns coated with up to 2 μm films of immobilized SE-54 (methyl phenyl (5%) silicone) is evaluated under gas chromatographic conditions. The influence of pressure drop on the plate height is discussed. In comparison to thick film 250-530 μm i.d. columns, much higher efficiencies and faster analyses are obtained. Practical examples, performed on a standard GC instrument, illustrate the features of thick film 50 μm i.d. columns.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240180202
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