title: Optimization of micellar liquid chromatographic separation of polycyclic aromatic hydrocarbons with the addition of second organic additive.
abstract: The micellar liquid chromatographic (MLC) separations of polycyclic aromatic hydrocarbons (PAHs) were optimized for three micellar systems, cetyltrimethylammonium chloride (CTAC), dodecyltrimethylammonium chloride (DTAC), and sodium dodecylsulfate (SDS), with 1-pentanol as the only organic additive. A difference in the separation was observed between CTAC and SDS/DTAC. Under each optimized separation conditions, CTAC-modified mobile phase provides the least desirable separation, which is attributed to its longer carbon tail (C16 vs. C12). In addition to 1-pentanol, the main organic additive, a second organic additive (3% 1-propanol) in the micelle-modified mobile phase was found to enhance the resolution of PAH chromatographic peaks. However, the extent of the enhancement varies for the different micellar systems, with the greatest resolution improvement seen for CTAC, and little effect for shorter-tail SDS and DTAC. This study shows the potential use of second organic additive (1-propanol), to the main nonpolar additive (1-pentanol), in facilitating the MLC separation of larger nonpolar compounds.
authors.affiliation: Department of Chemistry, University of Missouri-Columbia, Columbia, Missouri 65211, USA.
authors.forename: Chunfeng
authors.initials: C
authors.lastname: Mao
authors.forename: Kelly E
authors.initials: KE
authors.lastname: McGill
authors.forename: Sheryl A
authors.initials: SA
authors.lastname: Tucker
mesh_terms: D002244:Carbon / Q000737:chemistry*; D000077286:Cetrimonium; D002593:Cetrimonium Compounds / Q000737:chemistry; D002712:Chlorides / Q000737:chemistry*; D002845:Chromatography; D002851:Chromatography, High Pressure Liquid; D002853:Chromatography, Liquid / Q000379:methods*; D003902:Detergents / Q000494:pharmacology; D006838:Hydrocarbons / Q000032:analysis / Q000737:chemistry*; D008823:Micelles; D000439:Pentanols / Q000737:chemistry*; D000644:Quaternary Ammonium Compounds / Q000737:chemistry; D012967:Sodium Dodecyl Sulfate / Q000737:chemistry; D013997:Time Factors
chemical_list: D002593:Cetrimonium Compounds; D002712:Chlorides; D003902:Detergents; D006838:Hydrocarbons; D008823:Micelles; D000439:Pentanols; D000644:Quaternary Ammonium Compounds; D012967:Sodium Dodecyl Sulfate; D002244:Carbon; C022806:dodecyltrimethylammonium; C024999:n-pentanol; D000077286:Cetrimonium