title: 1,3-Alternate 25,27-dibenzoiloxy-26,28-bis-[3-propyloxy]-calix[4]arene-bonded silica gel as a new type of HPLC stationary phase.
abstract: A new 1,3-alternate 25,27-dibenzoiloxy-26,28-bis-[3-propyloxy]-calix[4]arene-bonded silica gel stationary phase (1,3-Alt CalixBn) has been prepared and used for the separation of aromatic positional isomers by high-performance liquid chromatography (HPLC). The effect of organic modifier content and pH of the mobile phase on retention and selectivity of these compounds were studied. Application examples were provided for separation of purine and pyrimidine bases and non-steroidal anti-inflammatory drugs.
authors.affiliation: Department of Organic Chemistry, Gdansk University of Technology, Narutowicza 11/12, 80-952 Gdańsk, Poland.
authors.forename: Magdalena
authors.initials: M
authors.lastname: Sliwka-Kaszyńska
authors.forename: Katarzyna
authors.initials: K
authors.lastname: Jaszczołt
authors.forename: Aleksander
authors.initials: A
authors.lastname: Kołodziejczyk
authors.forename: Janusz
authors.initials: J
authors.lastname: Rachoń