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[求助] 阿霉素标准曲线测定

各位师兄师姐,盐酸阿霉素用三乙胺脱盐酸盐后为暗红色的,为什么再直接叫入到PBS中配制DOX/PBS标准溶液时就变为紫色的呢,变成紫色是不是就说明坏了?还有DOX的最大吸收波长文献上说是480nm或者有的是497nm,但是脱盐后直接配制的PBS溶液最大吸收波长发生偏移到550多,求解啊?
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