【摘要】 研究了Mn（Ⅱ）-5-Br-PADAP-Triton X-100析相光度体系,拟定了直接测定酒中微量锰的方法.在pH9.0H₃BO₃-NaOH缓冲溶液中,Mn（Ⅱ）-5-Br-PADAP-Triton X-100配合物最大吸收峰位于564mn,摩尔吸光系数为7.4×10⁵,锰含量在0～8.0μg/50ml范围内服从比耳定律.方法应用于酒中微量锰的测定.更多还原

【Abstract】 The optimum condition of the phase separation-colouring reaction of Mn(Ⅱ) with 5-Br-PADAP in the presence of Triton X-100 was studied thoroughly and a method for the determination of traces of Mn(Ⅱ) in wine was proposed. The appropriate acidity for the reaction was found to be in the range of pH 7.5-10. 5 and a H3BO3-NaOH buffer medium of pH 9 was chosen for the method. The maximum absorption of the complex lies at 564nm with an apparent molar absorptivity of 7. 4×105. Beer’ s law is obeyed for Mn(Ⅱ) concentration in the range of 0 to 8. 0μg/50ml. The proposed method has been applied to the determination of Mn(Ⅱ) in wine with satisfactory results.更多还原