Fe(Ⅲ)-中性红-NO_2^-极谱催化波的研究及应用  

Studies on and Application of Polarographic Catalytic Wave of Fe(Ⅲ)-NR-NO2-System

作　　者：张著森[1] 黄田富[1] 

机构地区：[1]龙岩学院化学与材料工程系,福建龙岩364000

出　　处：《龙岩学院学报》2007年第3期61-62,77,共3页Journal of Longyan University

摘　　要：在0.03mo1/L的NH3-NH4Cl缓冲溶液中(pH9.0),Fe3+-NR在NaNO2存在下,于-1.15V(vs,SCE)处产生灵敏的极谱催化波,极谱波峰电流与铁离子浓度在5.0×10-8～8.0×10-6mol/L范围内呈线性关系,检出限为2.0×10-8mol/L。测得铁(Ⅲ)与中性红(NR)配合物的组成为1:1,研究了极谱波的性质。方法可用于水样中痕量铁的测定。In the 0.03 mol/L NH3-NH4Cl buffer solution, at pH 9.0, a sensitive catalytic wave of Fe （Ⅲ）-NR-NO2- is obtained by using single-sweep polarography at -1,15V（vs. SCE）, The peak current is proportional to iron ion concentration in the range of 5×10^-8～8×10^-6 mol/L, the detection limit is 2×10^-8 mol/L, Several electrochemical methods have been used to study the properties of the pelarographic wave and the mechanism of electrode. The molar ratio of Fe（Ⅱ） to NR is 1：1. This method has been successfully applied to the determination of trace iron in medicine and water samples.

关 键 词：铁 中性红(NR) 极谱催化波 单扫极谱法 

分 类 号：O6-3[理学—化学]