THE TRANSFER OF ALKALINE EARTH-METAL ION AT W/NB INTERFACE FACILITATED BY JOSAMYCIN

This paper describes the invesligation of the transfer behaviour of the alkaline earth-metal cations across the water/nitrobenzene interface facilitated by josamycin in the nitrobenzene phase using semi-differential cyclic voltammetry .The peak height is directly proportional to the concentration of josaycin (nb) and to the potential scan rate.The complexes formed from alkaline earth-metal ions and josamycin at the w/nb interface are ML2^2+ ion.

交沙霉素在水/硝基苯界面传递行为的研究

研究了交沙霉素络合推动Zn^(2+)离子在水(w)/硝基苯(nb)界面传递的行为。在0.1mol/L ZnCl_2(w)-0.005mol/L TPAsTPB(nb)体系中,交沙霉素与Zn^(2+)能形成ZnL^(2+)和ZnL_2^(2+)络合物。交沙霉素浓度(Nb)大于197μ/mL(μ为生物效价),阳极波呈现为相应于ZnL^(2+)和ZnL_2^(2+)的双峰。当温度≤20℃,扫速大于60mV/s和交沙霉素浓度(nb)低于493μ/mL时,阴极波仅为ZnL^(2+)的单峰。e_(pc)与交沙霉素浓度(nb)成正比,线性范围为30～493μ/mL,检出限为10μ/mL。再现性的相对标准偏差在3%以内,回收率为94%～104%。与生物法相比,其相对误差在±3%左右。