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Digitale Medien

Dual capillary column supercritical fluid chromatography (1990)

Raynor, M. W. ; Moulder, R. ; Davies, I. L. ; [weitere]

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 13 (1990), S. 22-26

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ISSN: 0935-6304

Schlagwort(e): Supercritical fluid chromatography ; Dual capillary columns ; Polycyclic aromatic hydrocarbons ; Hop and beer bitter acids ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: A chromatograph equipped with one injection valve, two capillary columns with different selectivities, two flame ionization detectors and two electrometers is used to perform simultaneous dual capillary supercritical fluid chromatography. Two sets of retention times and indices are obtained for a mixture of polycyclic aromatic hydrocarbons, from one injection, enabling positive identification. The system is also used to rapidly select a stationary phase for separating hop and beer bittering acids.

Zusätzliches Material: 8 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240130106

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Digitale Medien

An application of the INEPT pulse sequence to the NMR assignment of halogenated marine natural products (1983)

Brownlee, R. T. C. ; Hall, J. G. ; Reiss, J. A.

Chichester : Wiley-Blackwell

Organic Magnetic Resonance 21 (1983), S. 544-547

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ISSN: 0030-4921

Schlagwort(e): Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: The routine use of the INEPT pulse sequence is shown to be the method of choice for the assignment of multiplicity from 13C NMR spectra where no prior information about the 1J(CH) coupling constants is available, or where these are expected to vary over a large range. This technique is illustrated using spectra obtained from polyhalogenated monoterpenes isolated from the red alga Plocamium angustum, which have 1J(CH) values varying from 127 to 203 Hz.

Zusätzliches Material: 3 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/omr.1270210905

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