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| 1.
論文 |
論文
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Hayakawa, Kazuichi ; Miyazaki, Motoichi
概要:
A HPLC method with peroxyoxalate-chemiluminescence (CL) detection has been developed for the determination of dinitropyrenes (DNPs) and nitropyrene (NP). Both DNPs and NP, which are CL-insensitive, were initially reduced to the
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corresponding amino-derivatives with sodium hydrosulfide. They were separated on a reversed-phase column and chemilumigenically determined with detection limits in the subfmol range. Utilizing this method, DNPs and NP were determined in gasoline and diesel particulate samples.
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| 2.
論文 |
論文
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Hayakawa, Kazuichi ; Kitamura, Ryuichi ; Butoh, Mizuka ; Imaizumi, Noriko ; Miyazaki, Motoichi
概要:
A high performance liquid chromatographic (HPLC) method with chemiluminescence (CL) detection was developed for the sens
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itive determination of 1, 3-diaminopyrene (1, 3-DAP), 1, 6-DAP, 1, 8-DAP and 1-aminopyrene (1-AP). The HPLC conditions were as follows: column, Cosmosil 5C18 (4.6mm i.d.×250mm); mobile phase, 10mM imidazole- perchloric acid buffer(pH 7.6)-acetonitrile (1:1, v/v); CL reagent, 0.02mM bis(2, 4, 6-trichlorophenyl)oxalate (TCPO) and 15mM hydrogen peroxide in acetonitrile. The oxidative degradation of DAPS and AP in the presence of metals was prevented by adding ascorbic acid to sample solutions. The calibration curves were straight over 2 orders of magnitude for all analytes, and their detection limits (as S/N was 3) were in the sub-fmol range. Dinitro- and nitropyrenes in sooty emissions of diesel- and gasoline-engine cars could be determined by this HPLC after reductive conversion into DAPs and AP, respectively, by refluxing the samples in the presence of sodium hydrosulfide.
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