• 作者： 許東明; 柯素雅
• 作者服務機構： Contribution from the Department of Chemistry, National Taiwan University, Taipei, Taiwan
• 中文摘要： Cobalt(II) chelate of p-(2-hydroxy-1-naphthylazo)benzenesulphonate (orange II) has been studied spectrophotometrically in aqueous solution at 25° and at an ionic strength of 0.10M. The formation of this chelate is pH dependent, the optimum pH range is between 9.5 to 10.8. Its mole ratio of ligand to cobalt(II) is 3 to 1 stoichiometry and the formation constant, logK, is determined as 19.17±0.13. By using the wave-length of 357mμ, determination of trace amount of cobalt(II) with the sensitivity of 0.077 γ/cm2 is possible.
• 英文摘要： --
• 中文關鍵字： --
• 英文關鍵字： --