链霉素溶解后发生变色,这是由于链霉素溶液在室温放置后,链霉素发生少量水解,产生落叶松皮素。如溶液为酸性又有微量鉄离子存在时,则可产生紫红色物质,使溶液变色。因此配制好了的链霉素溶液,要尽量缩短放置时间,避免分解,降低疗效。链霉素溶解后发生结晶,是由于制品小有钙存在。据有的研究者报告,适量钙离子可以减轻链霉素的急性毒性反应,因此在制品中常加入适量葡萄糖酸钙或 Streptomycin dissolved after discoloration, which is due to streptomycin solution placed at room temperature, a small amount of streptomycin hydrolysis, produce larch plastin. If the solution is acidic and traces of ions exist, you can produce purple material, the solution discoloration. Therefore, the preparation of a good streptomycin solution, to minimize placement time, to avoid decomposition, reduce the effect. Streptomycin dissolved after crystallization, is due to small calcium products exist. According to some researchers, the appropriate amount of calcium ions can reduce the acute toxicity of streptomycin, so often add appropriate products in the calcium gluconate or