※一部利用できない機能があります
| 1.
論文 |
論文
|
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
…
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.
続きを見る
|
||||
| 2.
論文 |
論文
|
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
…
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.
続きを見る
|
||||
| 3.
論文 |
論文
|
Imaizumi, Noriko ; Hayakawa, Kazuichi ; Okubo, Noboru ; Miyazaki, Motoichi
概要:
A selective, sensitive and accurate determination of sulfite was proposed by high performance liquid chromatography (HPL
…
C). The sulfite was converted quantitatively to an adduct by reacting with a triphenylmethane dye, malachite green (MG). The formation of adduct was complete, and the adduct was stable at the experimental conditions. Then, the adduct was submitted to HPLC. The working curve for sulfite was linear in the range from 2.0×10-12 mol upto 1.2×10-9 mol.
続きを見る
|
||||
| 4.
論文 |
論文
|
Hayakawa, Kazuichi ; Miyazaki, Motoichi
概要:
A HPLC method with peroxyoxalate-chemiluminescence (CL) detection has been developed for the determination of dinitropyr
…
enes (DNPs) and nitropyrene (NP). Both DNPs and NP, which are CL-insensitive, were initially reduced to the 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. © 1991, The Japan Society for Analytical Chemistry. All rights reserved.
続きを見る
|
