硝普钠-铜(Ⅱ)体系的极谱法研究与应用  

Single-sweep Polarography of Sodium Nitroprusside-Cu(Ⅱ) System

作　　者：张娟[1] 杨明敏[1] 赵道远[1] 郑修文[1] 

机构地区：[1]南京农业大学理学院,南京210095

出　　处：《分析科学学报》2006年第3期315-317,共3页Journal of Analytical Science

摘　　要：本文用单扫描极谱法研究了硝普钠（SNP）-铜（Ⅱ）体系的伏安行为。在pH3．0的克拉克-鲁布斯缓冲溶液中，SNP和SNP-Cu^2＋体系于-0．47V（vs．SCE）处均有极谱还原峰，但SNP-Cu^2＋体系的灵敏度是SNP的100倍左右，其峰高与SNP浓度在2．0×10^-7～4．0×10^-5mol／L范围内呈线性关系，检出限为1．0×10^-7mol／L。应用本法测定静脉注射到大白鼠中SNP的含量，结果满意。The voltammetric behavior of SNP-Cu （Ⅱ） system was studied by single-sweep oscillopolarography. In a medium of 0. 2 mol/L HCl-KHC8H4O4 （pH 3.0） buffer solution, both reduction waves of SNP and SNP-Cu（ Ⅱ ） were obtained at -0.47 V（vs. SCE）. But the sensitivity of SNP-Cu（ Ⅱ ） was about 100 times of SNP. The peak current is proportional to the concentration of SNP over the range from 2 × 10^-7 mol/L to 4 × 10^-5mol/L（r=0. 9997） . The detection limit is 1× 10^-7 mol/L. The method has been applied to the determination of content of SNP in mice plasma, and the mean recoveries were 94.90%～109.83% ,the relative standard deviations（n=3） were 0. 034%～1.63%.

关 键 词：硝普钠 铜 单扫描极谱法 

分 类 号：O657.14[理学—分析化学]