- 作者: 曾騰, 潘碌亭, 郜洪文
- 作者服務機構: State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, P. R. China
- 中文摘要: Dibromocarboxyarsenazo (DBCA) was used to complex Fe and Cu ions at pH 6.22, and complexes Cu(DBCA) and Fe(DBCA) were formed. Fe ion replaced Cu competitively from its dinuclear complex Cu(DBCA)Cu to form the heterodinuclear complex, Cu(DBCA)Fe. The light-absorption ratio variation approach has been applied to the direct determination of Fe ions with a high selectivity and good sensitivity using heterodinuclear replacement complexation. The limit of detection of Fe is only 2.5 ng/mL. The results from the analyses of five Huangpu River (Shanghai) cross-section samples indicate that Fe ions are from 5.0 to 39.2 μg/L with the recovery rates between 85.5 and 111.5%.
- 英文摘要: --
- 中文關鍵字: Determination of iron ions; Dibromocarboxyarsenazo; Light-absorption ratio variation approach; Heterodinuclear replacement complexation; Spectral correction technique.
- 英文關鍵字: --