title: Simultaneous determination of gaseous and particulate carbonyls in air by coupling micellar electrokinetic capillary chromatography with molecular imprinting solid-phase extraction.
abstract: A novel method coupling molecular imprinting solid-phase extraction (MISPE) and micellar electrokinetic capillary chromatography (MEKC) was developed to enable the hourly determination of low level of ambient carbonyls, and study their partition between gaseous phase and particulate phase. With 2,4-dinitroaniline (DNAN) as dummy imprinting template, the unreacted 2,4-Dinitrophenylhydrazine (DNPH) in sampling solution could be removed effectively using MISPE, and an average recovery of 97±5.3% (n=5) for the carbonyl-DNPH derivatives was achieved. Owing to the high enrichment due to sample clean-up, and the improvement of MEKC separation efficiency, many low abundant carbonyls could be detected by hourly in the field study.
authors: College of Environmental Science & Technology, Guangzhou University, Guangzhou 51006, China.
authors: Hui
authors: H
authors: Sun
authors: School of Chemistry and Environment, South China Normal University, Guangzhou 51006, China. Electronic address: laijp@scnu.edu.cn.
authors: Jia-Ping
authors: JP
authors: Lai
authors: Department of Chemistry, the University of Hong Kong, Hong Kong SAR, China.
authors: Ying Sing
authors: YS
authors: Fung
mesh_terms: D000079:Acetaldehyde / Q000032:analysis*; D000096:Acetone / Q000032:analysis*; D000393:Air Pollutants / Q000032:analysis*; D020374:Chromatography, Micellar Electrokinetic Capillary / Q000379:methods; D005557:Formaldehyde / Q000032:analysis*; D005740:Gases; D057230:Limit of Detection; D054802:Molecular Imprinting; D052638:Particulate Matter / Q000032:analysis*; D010659:Phenylhydrazines / Q000737:chemistry; D052616:Solid Phase Extraction / Q000379:methods
chemical_list: D000393:Air Pollutants; D005740:Gases; D052638:Particulate Matter; D010659:Phenylhydrazines; D000096:Acetone; D005557:Formaldehyde; C004787:2,4-dinitrophenylhydrazine; D000079:Acetaldehyde
keywords: 2,4-Dinitrophenylhydrazine; Atmospheric carbonyls; Micellar electrokinetic capillary chromatography; Molecular imprinting solid-phase extraction