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墨雪 凌风

新虫 (初入文坛)

[求助] 液相色谱测琥珀酸 已有2人参与

新手求帮助!各位大神帮帮忙,高效液相色谱测琥珀酸出现两个峰是怎么回事啊?测定条件是:0.01mol/ L KH2PO4(pH2.9)∶乙腈(98∶2)缓冲溶液为流动相, 控制流速为 1mL/min, 柱温 25 ℃, 检测波长 213 nm, 进样量 20 μL

液相色谱测琥珀酸
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zongyuan

捐助贵宾 (知名作家)

【答案】应助回帖

感谢参与,应助指数 +1
如果是验证过的方法,可能和柱子有关,不同品牌,使用很久等
如果是没验证过的,可能和PH,缓冲盐浓度有关

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2楼2015-11-26 21:24:48
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qcd1988

至尊木虫 (著名写手)

【答案】应助回帖

感谢参与,应助指数 +1
建议做几个浓度梯度的标样,如果还是2个峰,可以调节流动相比例
https://www.researchgate.net/profile/Chengdu_Qi2/?ev=hdr_xprf
3楼2015-11-26 21:31:04
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