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- W2023269549 abstract "Cyanopropyl (CN) and pentafluorophenylpropyl (PFPP) modified silica columns give good retention and good peak shape for the high performance liquid chromatography/electrospray ionization/mass spectrometry (HPLC/ESI/MS) analysis of several classes of basic drugs. These phases enhance the ESI-MS signal by providing good retention of basic drugs with a mobile phase containing 90% acetonitrile. With C18 columns, in order to achieve good retention of basic drugs, only a mobile phase containing less than 40% acetonitrile can be used. Higher concentrations of acetonitrile produce a larger MS signal in the ESI process; the MS signal was a factor of 9 and 12 times greater on the CN and PFPP phases when compared with the C18 phase for the analysis of codeine. The C18 phase required only 4.0-6.0% acetonitrile to obtain the same retention time for codeine. The CN and PFPP stationary phases can be used for the analysis of a range of basic drugs, including many compounds which are poorly retained on the popular C18 and C8 stationary phases. Applications of CN and PFPP columns in the HPLC/ESI/MS of basic drugs include the analysis of antimalarials, such as quinine, bronchodilators, such as salbutamol and tulobuterol, cardioactive drugs, such as procainamide and beta-blockers, tricyclic antidepressants (TCAs), such as protriptyline and trimipramine and alkaloids, such as morphine and codeine. The CN and PFPP phases are also useful for the analysis of bufuralol and its metabolite, hydroxy-bufuralol. All the above analyses were performed using the same mobile phase, 90% acetonitrile; thus the HPLC method development process was expedited. The CN and PFPP phases also gave reproducible retention times and peak shape after more than 8 h of analyses." @default.
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- W2023269549 date "2000-08-01" @default.
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- W2023269549 title "The high performance liquid chromatography electrospray ionization mass spectrometry analysis of diverse basic pharmaceuticals on cyanopropyl and pentafluorophenylpropyl stationary phases" @default.
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- W2023269549 doi "https://doi.org/10.1016/s0731-7085(00)00348-4" @default.
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