- 作者: 胡乃梁,郜洪文,張?,詹國青
- 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: A new chromogenic reagent, 2-hydroxyl-5-benzeneazoformoamithiozone (HBASA) was synthesized and it can complex Co(II) and Ni(II) at pH 6.0 with high sensitivity and good selectivity. The complexations were characterized by a spectral correction technique. Complexes Co(HBASA)2 and Ni(HBASA) were formed and their stepwise stability constants (Kn) and stepwise molar absorptivities (en) were worked out. The spectral correction matrix method was applied to the simultaneous determination of Co and Ni. At the range from 0 to 12.0 mg /25-mL Co and Ni, the correction absorbances (Ab) of the mixed complexes’ solutions have good linearity. The limit of detection is 0.01 mg/l Co and 0.03 mg/l Ni and the relative standard deviation (RSD) is 2.5% for Co and 5.6% for Ni. This method was applied to the analysis of wastewater. The recovery of Co was between 94.5 and 109% and that of Ni between 99.0 and 111%.
- 英文摘要: --
- 中文關鍵字: Spectral correction technique; Spectrophotometry; Metal complex; Determination of Co and Ni; 2-Hydroxyl-5-benzeneazoformoamithiozone.
- 英文關鍵字: --