title: Retention of anions on silica-based metalloporphyrin stationary phases.
abstract: The silica-based Fe(III)-protoporphyrin and Zn-tetraphenylporphyrin stationary phases were examined for the HPLC separation of anions. The retention of nine common inorganic anions as well as benzoate anion (BA) and its hydroxy analogues (HBA) was examined using tartrate, acetate, and succinate eluents. The retention factors of inorganic anions on the FeProP stationary phase were in the order Cl- < NO3- < ClO4- < I- < SCN- and for organic anions benzoate < p-hydroxybenzoate < m-hydoxybenzoate < o-hydroxybenzoate. The retention factors of organic anions examined for a ZnTPP column were in the order p-HBA < m-HBA < BA < o-HBA.
authors.affiliation: Department of Chemistry, Warsaw University, Poland.
authors.forename: Magdalena
authors.initials: M
authors.lastname: Biesaga
authors.forename: Elzbieta
authors.initials: E
authors.lastname: Stolarczyk
authors.forename: Krystyna
authors.initials: K
authors.lastname: Pyrzyńska
authors.forename: Marek
authors.initials: M
authors.lastname: Trojanowicz