title: 4-Carbomethoxybenzaldehyde as a highly sensitive pre-column fluorescence derivatization reagent for 9,10-phenanthrenequinone.
abstract: 9,10-Phenanthrenequinone (PQ) is harmful environmental pollutant that is detected in airborne particulates. The measurement of PQ in the air should be necessary to evaluate the potential adverse effects of PQ on human health. We have recently developed a determination method for PQ based on the fluorescence derivatization of PQ using benzaldehyde and ammonium acetate as a reagent. In this study, in order to obtain more sensitive and selective fluorescence derivatization reaction, we measured the fluorescence of the reaction mixture of PQ with 21 kinds of aromatic aldehydes in the presence of ammonium acetate. Among the tested aldehydes, 4-carbomethoxybenzaldehyde was found to be the best reagent in regard to fluorescence intensity and emission wavelength maximum. Based on the fluorescence derivatization with 4-carbomethoxybenzaldehyde, a highly sensitive chromatographic method was developed for the determination of PQ with the detection limit (S/N=3) of 1.2 fmol/injection.
authors.affiliation: Graduate School of Biomedical Sciences, Course of Pharmaceutical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan.
authors.forename: Naoya
authors.initials: N
authors.lastname: Kishikawa
authors.forename: Maiko
authors.initials: M
authors.lastname: Nakao
authors.forename: Mohamed Saleh
authors.initials: MS
authors.lastname: Elgawish
authors.forename: Kaname
authors.initials: K
authors.lastname: Ohyama
authors.forename: Kenichiro
authors.initials: K
authors.lastname: Nakashima
authors.forename: Naotaka
authors.initials: N
authors.lastname: Kuroda
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D001547:Benzaldehydes; D002845:Chromatography / Q000379:methods* / Q000592:standards; D004782:Environmental Health / Q000379:methods; D005453:Fluorescence; D006801:Humans; D007202:Indicators and Reagents; D057230:Limit of Detection; D052638:Particulate Matter; D010616:Phenanthrenes
chemical_list: D000393:Air Pollutants; D001547:Benzaldehydes; D007202:Indicators and Reagents; D052638:Particulate Matter; D010616:Phenanthrenes; C005399:9,10-phenanthrenequinone