摘要
研究了Ｋ＿４〔Ｆｅ（ＣＮ）＿６〕－硫脲－Ｈ＿２ＳＯ＿４测定痕量汞的催化显色新体系。Ｈｇ（Ⅱ）的浓度在０～１．０２μｇ／２５ｍＬ范围内遵守Ｂｅｅｒ定律，间接摩尔吸光系数ε′＿（６１５）＝６．６×１０￣５Ｌ·ｍｏｌ￣（－１）·ｃｍ￣（－１）．回收率９０．２％～１０２．０％，变异系数２．０８％。该法用于饮料等食品中痕量汞的测定获得令人满意的结果。
A new colour reaction of K4 Fe(CN)6 -thiourea-H2SO4 catalyzed by mer-cury(Ⅱ)has been studied. The detection limit of Hg is 3 ng/mL。Beer s law is obeyed for Hg(Ⅱ)in the range of 0～1.02 μg/25 mL,variation coefficient is 2.08% and recovery 90.2%～102.0%。The Molar absorptivity is 6.6 × 105L·mol(-1)·cm(-1).This method has been applied tothe determination of Hg in food with satisffactory results。
出处
《南昌大学学报（工科版）》
CAS
1995年第4期19-22,共4页
Journal of Nanchang University(Engineering & Technology)
