カワムラ　クニオ   KAWAMURA Kunio   川村　邦男    所属   広島修道大学  人間環境学部    職種   教授
言語種別	英語
発行・発表の年月	2007/01
形態種別	学術論文
査読	査読有り
標題	Stopped-flow spectrophotometric determination of nM level of Pb(II) using 5,10,15,20-terakis(1-methylpyridinium-4-yl)porphine
執筆形態	共著
掲載誌名	Microchim. Acta
掲載区分	国外
巻・号・頁	157(1-2),pp.87-91
担当範囲	Corresponding author
著者・共著者	◎Kunio Kawamura, Shukuro Igarashi, Takao Yotsuyanagi
概要	A spectrophotometric determination method for nM levels of Pb(II) has been developed using a stopped-flow spectrophotometer with cationic water- soluble porphyrin. The stopped-flow spectrophotometer allows the monitoring of the incorporation reaction of the Pb(II) ion into 5,10,15,20-terakis(1-methylpyridi- nium-4-yl)porphine (TMPYP) within a narrow time window (2.5 s) at pH 10.5–12.0 before the Pb-TMPYP complex is replaced with other foreign metal ions, since usually the Pb-TMPYP complex is very labile and readily replaced with other metal ions. This improved the selectivity of Pb(II) determination as compared to the conventional spectrophotometric determination of Pb(II) using water-soluble porphyrins.