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  • 1
    Electronic Resource
    Electronic Resource
    Comparison of polydimethyl siloxane stationary phases with 5% and 50% phenyl substitution for the separation of organophosphorus and organonitrogen pesticides under optimized gas chromatographic conditions (1995)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 18 (1995), S. 111-114 
    Details
    ISSN: 0935-6304
    Keywords: Capillary gas chromatography ; Poly(dimethyl diphenyl siloxane) phases ; Temperature program optimization ; Organophosphorus and organonitrogen pesticides ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The CGC analysis of 25 organophosphorus and organonitrogen pesticides was optimized on two different stationary phases, namely a 5% diphenyl dimethyl silicone (SE-54 type) and a 50% diphenyl dimethyl silicone (OV-17 type) by selecting the best temperature program conditions, using computer simulation.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240180209
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  • 2
    Electronic Resource
    Electronic Resource
    Detection of sugar addition to citrus juices by capillary GC (1995)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 18 (1995), S. 286-288 
    Details
    ISSN: 0935-6304
    Keywords: Capillary GC ; Citrus juices ; Adulteration ; Oligosaccharides ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A method is described for the detection of citrus juices adulterated by addition of industrial sugar products. The oligosaccharides maltotriose (DP3) and maltotetraose (DP4), both of which are absent from the natural sugar profile of citrus fruits, serve as markers. The sample preparation method includes clean-up on a solid phase ODS cartridge, fractionation of DP3 and DP4 carbohydrates by LC on aminopropyl silica gel, and derivatization of the collected sugars to form the oxime-trimethylsilyl derivatives. Capillary GC analysis is performed on a 30 m × 0.32 mm i.d. polydimethylsiloxane fused silica column applying cool on-column injection and FID detection. The detection limit for maltotriose and maltotetraose is about 1 mg l-1. Several orange and grapefruit juices were evaluated on their authenticity. Adulteration with crystalline sugar products cannot be detected with the described procedure.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240180504
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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
    In Memoriam Professor Dr. A. (Nol) Venema 1940-1994 (1995)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Microcolumn Separations 7 (1995), S. 301-302 
    Details
    ISSN: 1040-7685
    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/mcs.1220070402
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  • 5
    Electronic Resource
    Electronic Resource
    In memoriam (1995)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 18 (1995), S. 1-1 
    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.1240180102
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  • 6
    Electronic Resource
    Electronic Resource
    Editorial (1995)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 18 (1995), S. 513-513 
    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.1240180902
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  • 7
    Electronic Resource
    Electronic Resource
    Chromatographic methods for the analysis of crude tall-oil (1995)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 18 (1995), S. 425-432 
    Details
    ISSN: 0935-6304
    Keywords: GC ; GC-MS ; Micro-LC ; SEC ; Crude tall-oil ; Fatty acids ; Resinic acids ; Unsaponifiable matter ; Dimers ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Chromatographic methods currently used for isolation, separation, and identification of the components of crude tall-oil have been reviewed, and their resolution and analytical methodology compared. Sample introduction by cold on-column, rather than vaporizing, injection provides good reproducibility and operational convenience for capillary GC analysis. Size exclusion chromatography for isolation followed by capillary GC-MS for identification, gave the best performance for analysis of acidic and dimeric compounds.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240180707
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  • 8
    Electronic Resource
    Electronic Resource
    Enhanced selectivity in the determination of trianzines in environmental samples by Benchtop CGC-MS-MS (1995)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 18 (1995), S. 545-550 
    Details
    ISSN: 0935-6304
    Keywords: Capillary GC-MS ; Capillary GC-MS-MS ; Selectivity ; Triazines and metabolites ; Water and soil samples ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Some triazines and metabolities have been analyzed in water and soil samples, at the 0.1 and 10 ppb level, respectively, by CGC-MS and CGC-MS-MS using an ion trap detector (ITD). The sample preparation consisted of SPE on LiChrolut EN cartridges for water samples, and of ultrasonic treatment followed by SPE for soil samples. Recoveries were in the order of 90%. The advantage of MS-MS compared to MS operation of the ITD, is the enhanced selectivity resulting in more precise determinations. The metabolites of atrazine and metribuzin have also been studied. Desethylatrazine and desamino-metribuzin are the main metabolites.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240180907
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  • 9
    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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