【摘要】 用萘作为萃取剂，以５－Ｂｒ－ＰＡＤＡＰ为显色剂测定微量锰，研究表明，络合物最大吸收波长为５６０ｎｍ，表现摩尔吸光系数为１．０７×１０５Ｌｍｏｌ－１ｃｍ－１，Ｍｎ（Ⅱ）在０．２～６．０μｇ／７ｍＬ范围内符合比耳定律，该法灵敏度高，快速简便。方法应用于食品，水样中锰的测定，结果满意。更多还原

【Abstract】 A new method of spectrophotometric determining microamount manganese is proposed. It is based on selecting maphathalene as extraction agent to extract the colour complex of 5 Br PADAP with Mn(Ⅱ). The maximum absorption of the complex is at 560mm and the molar absorptivity is 1.09×10 5L\5mol 1 \5cm 1 . Beer′s law is obeyed in the concentration range from (Ⅱ) in water and dood with satisfactory results.更多还原