离子交换树脂相分光光度法测定痕量Hg(Ⅱ)  

Determination of Trace Mercury by Ion Exchange Resin Phase Spectrophotometry

作　　者：沈淑君[1] SHEN Shu-jun(Department of Food and Biology Engineering, Zhangzhou Institute of Technology, Zhangzhou, Fujian 36300)

机构地区：[1]漳州职业技术学院食品与生物工程系,福建漳州363000

出　　处：《安徽农业科学》2017年第15期60-62,共3页Journal of Anhui Agricultural Sciences

摘　　要：[目的]研究一种灵敏可行的测定痕量汞的方法。[方法]在pH 4.5缓冲溶液介质中,Hg(Ⅱ)-NaSCN-结晶紫形成三元络合物,通过阴离子交换树脂相中的富集测定,建立了树脂相分光光度法测定痕量Hg(Ⅱ)的新方法。[结果]该方法最大吸收波长为595 nm,Hg(Ⅱ)在0.001~0.100μg/mL符合比尔定律,线性方程为A=7.319 6ρHg(Ⅱ)+0.003 5,相关系数(r)0.999 6,检出限为4.59×10^(-10g)/mL,摩尔吸光系数(ε)1.46×10~6L/(mol·cm)。[结论]该方法灵敏度高,可用于水样及土壤样品中痕量Hg(Ⅱ)的检测。[ Objective ] To study a sensitive and feasible method for the determination of Trace Mercury. [ Method ] A new method for the determination of Trace Mercury by ion exchange resin phase spectrophotometry was developed, base on the complex was obtained from Mercury （ Ⅱ ） -NaSCN- Crystal Violet in HAc -NaAc buffer solution （pH 4.5 ）. [ Result] The maximum absorption was 595 nm, the linear range was 0. 001 - 0. 100μg/mL. The regression equation was A = 7. 319 6pHg（Ⅱ） ＋ 0.003 5 with correlation coefficient 0. 999 6, and the detection limit was 4. 59 ×10 - 10 g/mL with the molar absorptivity being 1.46 × 10^6 L/（ mol. cm）. [ Conclusion ] The method has high sensitivity. It has been successfullv applied to the determination of Mercurv（ Ⅱ ） in water and soil samples.

关 键 词：痕量Hg(Ⅱ) 交换树脂相 吸光度法 

分 类 号：O657.32[理学—分析化学]