title: Investigation of the stability of Chiralpak AD chiral stationary phase under various solvent conditions and development of a method to identify stationary phase-derived polymer contamination.
abstract: The stability of Chiralpak AD chiral stationary phase under various solvent conditions was investigated. An analytical method for the detection of the presence of solubilized Chiralpak AD coating was developed using CD spectroscopy (CD signal at 245 nm). In addition, NMR analysis of the solubilized polymer revealed a characteristic signal for the 3,5-dimethylphenyl carbamate methyl protons at around 2.5 ppm. Both of these methods may be helpful in detecting contamination by the Chiralpak AD polymer or in the study of CSP solvent compatibility.
authors.affiliation: Separation and Analysis Technologies, Department of Process Research, Rahway, New Jersey, USA. christopher_welch@merck.com
authors.forename: Christopher J
authors.initials: CJ
authors.lastname: Welch
authors.forename: Jacob
authors.initials: J
authors.lastname: Fairchild
authors.forename: Peter
authors.initials: P
authors.lastname: Sajonz