title: Tetrabutylammonium phosphate-assisted separation of multiplex polymerase chain reaction products in non-gel sieving capillary electrophoresis.
abstract: A method based on non-gel sieving capillary electrophoresis (NGS-CE) with ultraviolet (UV) detection has been developed for the separation of multiplex polymerase chain reaction (PCR) products of three pathogenic bacteria in which hydroxypropylmethylcellulose was used as the sieving medium and dynamic capillary coating. In the method, an ion pair reagent, tetrabutylammonium phosphate (TBAP), was first used in NGS-CE to improve the detection sensitivities and resolutions of DNA fragments. The interaction of TBAP and DNA was proved using the UV spectra of DNA with and without TBAP. Field-enhanced sample injection was used as an on-line preconcentration method to improve the detection sensitivity. The separation of DNA fragments ranging from 100 to 1000 bp was accomplished in 30 min. Three pairs of primers and three PCR products of bacteria were successfully separated in 25 min using the developed method. The intraday relative standard deviations (RSDs) for the migration time and peak area for each PCR product were less than 2.4% (n=5), and the interday RSDs were less than 6.1% (n=15).
authors.affiliation: MOE Key Laboratory of Laser Life Science and Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, China.
authors.forename: Sheng
authors.initials: S
authors.lastname: Zhang
authors.forename: Cheng
authors.initials: C
authors.lastname: Jiang
authors.forename: Li
authors.initials: L
authors.lastname: Jia
mesh_terms: D004247:DNA / Q000737:chemistry* / Q000302:isolation & purification; D019075:Electrophoresis, Capillary / Q000379:methods*; D004926:Escherichia coli / Q000235:genetics; D065347:Hypromellose Derivatives; D008089:Listeria monocytogenes / Q000235:genetics; D008747:Methylcellulose / Q000031:analogs & derivatives / Q000737:chemistry; D016133:Polymerase Chain Reaction / Q000379:methods; D000644:Quaternary Ammonium Compounds / Q000737:chemistry*; D019779:Salmonella enterica / Q000235:genetics; D013056:Spectrophotometry, Ultraviolet
chemical_list: D000644:Quaternary Ammonium Compounds; D065347:Hypromellose Derivatives; D008747:Methylcellulose; D004247:DNA; C009405:tetrabutylammonium