Search Results - "Holtin, Karsten"

Determination of astaxanthin and astaxanthin esters in the microalgae Haematococcus pluvialis by LC-(APCI)MS and characterization of predominant carotenoid isomers by NMR spectroscopy by Holtin, Karsten, Kuehnle, Maximilian, Rehbein, Jens, Schuler, Paul, Nicholson, Graeme, Albert, Klaus

“…The oily product ZANTHIN® consists of natural astaxanthin, which is manufactured from the microalgae Haematococcus pluvialis by supercritical CO₂ extraction…”
Get full text

Monitoring the On-line Titration of Enantiomeric Omeprazole Employing Continuous-flow Capillary Microcoil 1H NMR Spectroscopy by Hentschel, Petra, Holtin, Karsten, Steinhauser, Lisa, Albert, Klaus

“…ABSTRACT The titration of the (S)‐enantiomer of omeprazole with the (R)‐enantiomer in chloroform‐d1 is monitored by continuous‐flow capillary microcoil 1H NMR…”
Get full text

Capillary NMR detection in separation science by Kühnle, Maximilian, Holtin, Karsten, Albert, Klaus

“…This review deals with the current status of important separation techniques using capillary NMR detection. The advantages and disadvantages of the different…”
Get full text

Monitoring the On‐line Titration of Enantiomeric Omeprazole Employing Continuous‐flow Capillary Microcoil 1 H NMR Spectroscopy by Hentschel, Petra, Holtin, Karsten, Steinhauser, Lisa, Albert, Klaus

“…The titration of the ( S )‐enantiomer of omeprazole with the ( R )‐enantiomer in chloroform‐ d 1 is monitored by continuous‐flow capillary microcoil 1 H NMR…”
Get full text

Monitoring the On-line Titration of Enantiomeric Omeprazole Employing Continuous-flow Capillary Microcoil super(1)H NMR Spectroscopy by Hentschel, Petra, Holtin, Karsten, Steinhauser, Lisa, Albert, Klaus

“…The titration of the (S)-enantiomer of omeprazole with the (R)-enantiomer in chloroform-d sub(1) is monitored by continuous-flow capillary microcoil super(1)H…”
Get full text

Online Coupling of Gas Chromatography to Nuclear Magnetic Resonance Spectroscopy: Method for the Analysis of Volatile Stereoisomers by Kühnle, Maximilian, Kreidler, Diana, Holtin, Karsten, Czesla, Harri, Schuler, Paul, Schaal, Walter, Schurig, Volker, Albert, Klaus

“…The identification of volatile cis/trans-stereoisomers was accomplished by employing a hyphenated GC-NMR system. The chromatographic and spectroscopic…”
Get full text

Phase optimized liquid chromatography as an instrument for steroid analysis by Kuehnle, Maximilian, Rehbein, Jens, Holtin, Karsten, Dietrich, Benjamin, Gradl, Manuela, Yeman, Helen, Albert, Klaus

“…A new method using phase optimized LC (POPLC) for the analysis of steroids is described. The retention factors and the theoretical plate numbers of different…”
Get full text

Characterization of bixin by LC-MS and LC-NMR by Rehbein, Jens, Dietrich, Benjamin, Grynbaum, Marc David, Hentschel, Petra, Holtin, Karsten, Kuehnle, Maximilian, Schuler, Paul, Bayer, Marc, Albert, Klaus

“…An overview upon modern analytical techniques for the isolation, separation, and structural identification of the essential bioactive carotenoid bixin is…”
Get full text

Online coupling of enantioselective capillary gas chromatography with proton nuclear magnetic resonance spectroscopy by Kühnle, Maximilian, Kreidler, Diana, Holtin, Karsten, Czesla, Harri, Schuler, Paul, Schurig, Volker, Albert, Klaus

“…The hyphenation of enantioselective capillary gas chromatography and mass spectrometry is not always sufficient to distinguish between structural isomers, thus…”
Get full text

Synthesis, characterization, and high-performance liquid chromatographic evaluation of C₁₄ stationary phases containing branched and unbranched alkyl groups by Dietrich, Benjamin, Holtin, Karsten, Bayer, Marc, Friebolin, Volker, Kühnle, Max, Albert, Klaus

“…Reversed-phase materials with branched and unbranched alkyl groups were prepared by modifying porous, spherical silica gel in a two-step…”
Get full text

Determination of astaxanthin and astaxanthin esters in the microalgae Haematococcus pluvialis by LC-(APCI)MS and characterization of predominant carotenoid isomers by NMR spectroscopy: Analytical Science in Germany by HOLTIN, Karsten, KUEHNLE, Maximilian, REHBEIN, Jens, SCHULER, Paul, NICHOLSON, Graeme, ALBERT, Klaus

Get full text