钴(Ⅱ)与5-NO_2-PADAT的络合吸附波研究  

Study on the Complex Adsorptive Wave of Cobalt(Ⅱ)and 5-(5′-nitro-2′-pyridylazo)-2,4-dimethylamino Toluene

作　　者：尚永辉[1] 

机构地区：[1]咸阳师范学院化学系,陕西咸阳712000

出　　处：《咸阳师范学院学报》2008年第2期37-39,共3页Journal of Xianyang Normal University

基　　金：咸阳师范学院专项科研基金项目(05XSYK224)

摘　　要：研究了钴(Ⅱ)与5-(5-硝基-2-吡啶偶氮)-2,4-二氨基甲苯(5-NO2-PADAT)的电化学性质,实验发现,Co2+与5-NO2-PADAT在六次甲基四氨体系中能产生一个较为灵敏的二阶导数极谱波,在峰电位Ep″为-1 420 mV(vs.SCE)处,钴浓度在4.0×10-5～5.0×10-4 mol/L范围内与二阶导数峰电流Ip″有良好的线性关系,检出限为2.0×10-5 mol/L(r=0.993 3,n=6);本法用于样品中微量钴的测定,结果满意。Electrochemical characteristics of Cobalt with 5- （5′-nitro-2′-pyridylazo）-2,4-dimethylamino toluene were investigated in this paper.Cobalt （Ⅱ）-5-（5′-nitro-2′-pyfidylazo）-2, 4-dimethylamino toluene complex in （CH2）6N4solution have a sensitive second order derivative reduction peak at -1420 mV （vs. SCE）. The peak current was proportional to the concentration of Cobalt （ Ⅱ ） in the range of 4×10^-5×10^4 mol/L, the detection limit was 2×10^-5 mol/L, （r=0.9933 ,n=6）. This method was applied to determine Cobalt （ Ⅱ ） in a sample with satisfactory result.

关 键 词：5-NO2-PADAT 钴 测定 

分 类 号：O647.3[理学—物理化学]