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[求助] 反相HPLC制备中大极性物质在进样时超压如何解决 求高手赐教

如题,在反相HPLC制备中使用ODS柱分离大极性物质时,梯度洗脱,以水-乙腈体系为例,由于物质极性较大,故乙腈初始浓度较低,往往绝大部分都是水或者全部都是水,进样时常常会碰到样品遇水析出,堵塞柱子,超压,无法正常分离。对于此类情况,有何解决方法,求高手赐教,请尽量全面,分条列述,多谢!!
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