【摘要】 在PH 7～8的磷酸盐缓冲溶液中,Co(Ⅱ)与1,4-双肼酞嗪(DHPH)在表面活性剂CTMAB存在下生成紫红色配合物,其组成比为o:DHPH= 1:1,最大吸收在510nm,表观摩尔吸光系数为2.2×10~4L.mol-1·cm-1,不稳定常数为2.1×10~-5,5～45μg Co/25ml范围内符合比尔定律,用于某些药物中微量钴的测定,结果较为满意。更多还原

【Abstract】 In a buffer solution of phosphate at pH 7—8 and in the presence of cationic surfactant CTMAB, cobalt forms a violet-red complex with 1, 4-dihydrazinophthalazine（DHPH）, of which the maximum absorbancis measured at 510 nm with molar absorptivity bcing 2. 2×10⁴L·mol^-1·cm^-1. The mstal-ligand ratio of Co（Ⅰ）/DHPH is 1: 1 Its apparent unstable constant K不is 2. 1×10^-5. Beer＇s law is obeyed within cobalt ccnecntration range of 5-45μg/25ml. The method can be used to determine micro amounts of Co in the vitamin B₁₂.更多还原