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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。
The interaction between jasamycin and Zn 2+ ions at the interface of water / w (nb) was studied. In the 0.1 mol / L ZnCl 2 (w) -0.005 mol / L TPAsTPB (nb) system, jasamycin and Zn 2+ could form ZnL 2+ and ZnL 2 2+ complexes . The josamycin concentration (Nb) is greater than 197μ / mL (μ is the biological potency), and the anodic wave appears as a doublet corresponding to ZnL 2+ and ZnL 2 2+. The cathodic wave is only a single peak of ZnL 2+ when the temperature is less than or equal to 20 ℃, the sweep speed is greater than 60mV / s and the concentration of jasamycin is lower than 493μ / mL. The e_ (pc) was proportional to the concentration of josamycin (nb), with a linear range of 30 ~ 493μ / mL with a detection limit of 10μ / mL. The relative standard deviation of reproducibility was within 3%, and the recovery was 94% ~ 104%. Compared with the biological method, the relative error is about ± 3%.