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雨欲语xu

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[求助] 关于钴离子显色的问题请教

各位大神,最近我合成了一个Co3O4-CeO2的复合材料,想测其中各组分所占的比例,(1)请教有什么检测方法可以检测?(2)我查文献看到网上有用分光光度计法检测,使用亚硝基R盐作为显色剂,但是我配的溶液并没有显色,是什么原因造成的?请大神指点,不胜感激!
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