化学イオン化マススペクトロメトリーによるC10H14 アルキルベンゼン異性体の分類と判別・同定

概要

論文の詳細を見る
CI spectra of all C10H14 alkylbenzenes, namely, four butylbenzenes (BB), three methyl-isopropylbenzenes (MIPB), three methylpropylbenzenes (MPB), three diethylbenzenes (MPB), three diethylbenzenes (DEB), six dimethylethylbenzenes(DMEB) and three tetramethylbenzenes (TMB), except 1,3-DM-2-EB were measured for the purpose of their isomeric classification, distinction and identification. Approximately 2 μg of each isomer in acetone was introduced into a Finnigan 3300 E GC/QMS equipped with a standard CI ion source via an OV-1 GC column. Methane (1.0 Torr) or isobutane (0.5 Torr) for reagent and carrier gas was introduced into the ion source maintained at 70°C. Methane CI spectra gave characteristic features for several alkylbenzene groups. Isomers could be classified as follows. Appearance of C4H9+ was characteristic to BB. MIPB and MPB could be distinguished from the remainders by the peaks of (M-41)+ and (M-13)+. MIPB and MPB could be distinguished from each other by the diffence of (M-41)+. TMB could be distinguished from DEB and DMEB by the peak of (M-27)+. The ion intensity of (M-29)+ served for distinguishing DEB and DMEB. Distinction of each isomer in DMEB and TMB was partly difficult. Isobutane CI spectra showed a considerable difference among alkylbenzene groups except BB and intergroup isomeric distinction and identification by comparing such peaks as (M-1)+, M+, (M+1)+ and (M+57)+ were easier than those performed by the methane CI spectra. Complementary results of methane and isobutane CI spectra enabled us grouping of C10H14 and isomeric distinction and identification of each alkylbenzene except 1,3-DM-4-EB and 1,4-DM-2-EB.
日本質量分析学会の論文

化学イオン化マススペクトロメトリーによるC10H14 アルキルベンゼン異性体の分類と判別・同定

スポンサーリンク

概要

著者

関連論文

スポンサーリンク