多環芳香族炭化水素のけい光分析用溶媒としてのジメチルスルホキシド

概要

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Dimethyl sulfoxide (DMSO) has never been used as asolvent in spectrofluorometric determination of polynuclear hydrocarbons. We found that this solvent was more useful than common solvent as such as benzene in the determination of polynuclear hydrocarbons (PAH) in air-suspended particulates, coal-tar, petroleum, etc. With this solvent PAH can be analysed quantitatively with a higher sensitivity. For example, the fluorescence of benzo[a]pyrene, benzo[ghi]perylene and pyrene was, respectively, 1.9, 5.6 and 8.1 times stronger in DMSO than that in benzene. The spectral pattern in both solvents was very similar, but the fluorescence peak wave lengths of PAH in DMSO were slightly shifted towards longer wave length. The use of DMSO simplified the extraction procedure of PAH from acetylated cellulose thin-layer plates, because of the high dissolving power of the solvent. A spot of PAH was scraped from the plate and extracted with a few milliliters of DMSO in a small centrifuge tube. After vigorous shaking the mixture was either centrifuged for several minutes or let stand for several hours. The supernatant solution was used for the spectrofluorometric determination of PAH. The extraction efficiency was more than 97% for benzo[a]pyrene, benzo[b]fluoranthene and pyrene. Furthermore, PAH in DMSO was proved to be stable at least for 70 days at a room temperature.
社団法人日本分析化学会の論文
1975-03-10