title: Enantioseparation of basic chiral drugs on a carbamoylated erythromycin-zirconia hybrid monolith using capillary electrochromatography.
abstract: An organic-inorganic hybrid monolithic column was prepared within the confines of a capillary via a single-step in situ sol-gel approach using zirconium tetrabutoxide as a precursor to compose the inorganic backbone and 3-triethoxysilylpropyl carbamoylated derivative of erythromycin (TEOSPC-ERY) as a co-precursor to introduce the organic chiral selector moiety in the zirconia backbone. The resulting carbamoylated ERY-zirconia hybrid monolith (ERY-ZHM) showed homogeneous morphology with well-defined through pores and was tightly connected with the inner wall of the capillary. The column was employed for capillary electrochromatographic enantioseparation of six basic chiral drugs in mobile phases (MPs) consisting of acetonitrile (ACN) and triethylammonium acetate (TEAA) buffer. The effects of composition of MP and applied voltage on chiral separation were investigated by using propranolol as a representative analyte. The highest resolution (Rs=3.33) was obtained with a MP consisting of 10/90 (v/v) ACN/TEAA buffer (10mM, pH 7), 10 kV applied voltage and 25°C capillary temperature. The relative standard deviations for resolution values regarding run to run, day to day, column to column and batch to batch repeatability were 0.41%, 0.89%, 1.80% and 2.26% (for n=3), respectively, indicating satisfactory stability of columns and reproducibility of column preparation process.
authors.affiliation: Department of Chemistry, Yeungnam University, Gyeongsan 38541, South Korea. Electronic address: drdixit.shuchi@gmail.com.
authors.forename: Shuchi
authors.initials: S
authors.lastname: Dixit
authors.affiliation: Department of Chemistry, Yeungnam University, Gyeongsan 38541, South Korea. Electronic address: jhpark@ynu.ac.kr.
authors.forename: Jung Hag
authors.initials: JH
authors.lastname: Park
mesh_terms: D000097:Acetonitriles / Q000737:chemistry; D002021:Buffers; D053801:Capillary Electrochromatography / Q000379:methods*; D002219:Carbamates / Q000737:chemistry*; D004917:Erythromycin / Q000737:chemistry*; D004364:Pharmaceutical Preparations / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification*; D011433:Propranolol / Q000737:chemistry; D015203:Reproducibility of Results; D013237:Stereoisomerism; D015040:Zirconium / Q000737:chemistry*
chemical_list: D000097:Acetonitriles; D002021:Buffers; D002219:Carbamates; D004364:Pharmaceutical Preparations; D004917:Erythromycin; D011433:Propranolol; D015040:Zirconium; C028541:zirconium oxide; C032159:acetonitrile
keywords: Capillary electrochromatography; Enantioseparation; Erythromycin; Zirconia hybrid monolith