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1757541064

新虫 (初入文坛)

[求助] 请问下跑HPLC用色谱纯的跟分析纯的区别大吗

请问下跑HPLC用色谱纯的跟分析纯的区别大吗???我之前用TFA跑的,现在用甲酸跑的,峰的保留时间变了,在平行组之间保留时间也有很挺多区别的,不知道是怎么回事,另外因为没有色谱纯的甲酸,这次使用的是分析纯的甲酸,不知道是不是甲酸纯度不够的缘故,求大神指导,
mobile phase with TFA:
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