DMPO-OH radical formation from 5,5-dimethyl-1-pyrroline N-oxide (DMPO) in hot water

Tomoko Shoji, Linxiang Li, Yoshihiro Abe, Masahiro Ogata, Yoshihisa Ishimoto, Ryoko Gonda, Tadahiko Mashino, Masataka Mochizuki, Michihisa Uemoto, Naoki Miyata

研究成果: Article査読

18 被引用数 (Scopus)

抄録

When an aqueous solution of 5,5-dimethyl-1-pyrroline N-oxide (DMPO) was heated at 70°C for 30 min, formation of DMPO-OH was observed by ESR. This DMPO-OH radical formation was suppressed under an argon atmosphere. When water was replaced with ultra-pure water for ICP-MS experiments, DMPO-OH radical formation was also diminished. Under an argon atmosphere in ultra-pure water, the intensity of the DMPO-OH signal decreased to about 1/20 of that observed under aerobic conditions with regular purified water. The addition of hydroxyl radical scavengers such as mannitol did not affect the formation of DMPO-OH, but the signal turned faint in the presence of EDTA. We suggest that DMPO reacted with dissolved oxygen to form DMPO-OH. 2007

本文言語English
ページ(範囲)219-221
ページ数3
ジャーナルanalytical sciences
23
2
DOI
出版ステータスPublished - 2007 2

ASJC Scopus subject areas

  • 分析化学

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