极谱催化波法测定土霉素  

Determination of oxytetracycline by polarographic catalytic wave in the presence of hydrogen peroxide

作　　者：何盈盈[1] 江元汝[1] 马彩莲[1] 

机构地区：[1]西安建筑科技大学理学院,西安710055

出　　处：《分析试验室》2004年第7期25-27,共3页Chinese Journal of Analysis Laboratory

摘　　要：H2 O2 存在时 ,产生土霉素的极谱催化波 ,该催化波的灵敏度比相应土霉素的还原波高 8倍 ,据此拟定了测定土霉素的新方法。在 0 .1 0mol LKH2 PO4 Na2 HPO4(pH 7.4± 0 .2 ) - 1 .6× 1 0 -3 mol LH2 O2 底液中 ,催化波峰电流与土霉素浓度在 5 .0× 1 0 -7～ 9.0× 1 0 -6mol L范围内呈线性关系 (n =1 0 ,r=0 9996)。检出限为 1 .0× 1 0 -7mol L。The catalytic polarographic wave of oxytetracycline was observed in the presence of hydrogen peroxide. The sensitivity of the catalytic wave was 8 times higher than that of the corresponding reduction wave. Based on this, a method for the determination of oxytetracycline was proposed. In 0.1 mol/L KH_2PO_4-Na_2HPO_4 (pH 7.4)-1.6×10^(-3) mol/L H_2O_2 solution, the second order derivative peak current of the catalytic wave was linear with oxytetracycline concentration in the range of 5.0×10^(-7)～9.0×10^(-6) mol/L. The detection limit was 1.0×10^(-7) mol/L.

关 键 词：土霉素 过氧化氢 极谱催化波 

分 类 号：O657.1[理学—分析化学]