光度分析法测定饮料中微量汞的研究

Study on the New Spectrophotometric Determination of Microamount of Mercury(Ⅱ) in Drink

研究了Ｈｇ（Ⅱ）－二苯基硫卡巴腙－ＴｒｉｔｏｎＸ－１００体系测定饮料等食品中微量汞的新方法，该配合物Ⅱ＿（ｍａｘ）＝５５０ｎｍ，表观摩尔吸光系数ε＿（５５０）６．６×１０￣４Ｌ·ｍｏｌ￣（－１）·ｃｍ￣（－１），Ｈｇ￣（２＋）含量在０～３０μｇ／２５ｍＬ范围内遵守Ｂｅｅｒ定律，该法用于饮料等食品中微量汞的测定，获得了令人满意的结果．

A new method of the spectrophotometric determination of microamount of mercury(Ⅱ)in the system of Hg(Ⅱ)-- dithizone - triton X - 100 has been studied. The complex has maximum absorption at 550 urn and the mole absorptivity is 6. 6×104 L· mol- l·cm- 1.Beer' s law is obeyed for Hg(Ⅱ) in the range of 0～30μg/25 mL. This new method has been applied to the determination of mercury(Ⅱ)in drink with satisfactory results.