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20091966

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[求助] Ni的标准曲线

请问有没有哥哥姐姐用丁二酮肟方法测过Ni的标准曲线?我不知道为什么加完EDTA溶液就从红棕色逐渐变浅了,成浅黄色,再过十几分钟就没有颜色了,这样对吗?加完显色剂正常应该是什么颜色啊???感激不尽。。。。。。。。。。。。。。。
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