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liuhiy

木虫 (正式写手)

[交流] ODS柱分离碱基核苷类物质

用ODS柱纯水中分离腺嘌呤和鸟嘌呤,没有得到样品峰,而尿嘧啶、胞嘧啶等有样品峰,这是为什么?
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liuhiy

木虫 (正式写手)

引用回帖:
2楼: Originally posted by Greifvogel at 2015-12-01 21:30:54
ODS不能用纯水作流动相,会“去浸润”(de-wetting),保留能力下降或者丧失。你测的那些没出峰的东西是没洗脱下来,你需要用含有5%甲醇的流动相,不可以用纯水。

谢谢。我想请问一下为什么腺嘌呤和鸟嘌呤洗脱不下来,而嘧啶类的能出峰呢
人生若只如初见
3楼2015-12-01 21:42:02
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Greifvogel

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★ ★ ★ ★ ★ ★
小木虫: 金币+0.5, 给个红包,谢谢回帖
liuhiy(200782060代发): 金币+5, 感谢交流 2015-12-11 11:12:26
ODS不能用纯水作流动相,会“去浸润”(de-wetting),保留能力下降或者丧失。你测的那些没出峰的东西是没洗脱下来,你需要用含有5%甲醇的流动相,不可以用纯水。
MeineEhreheisstTreue
2楼2015-12-01 21:30:54
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