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准博士

金虫 (正式写手)

[求助] 请教萃取内标法!

According to the manuscript, the authors have analyzed the products of their bioconversion experiments after liquid-liquid extraction with ethyl acetate. However, there is no indication of the usage of an internal standard (such as progesterone, for example).  According to my experience, this is a serious flaw. Typically, there is a significant variation in extraction efficiency from sample to sample, even if there is no change in the composition of the biotransformation media. This effect was neglected by the authors.

以上是审稿人提的意见。我先描述一下我的实验:我做得是微生物转化甾体化合物,转化结束,采用乙酸乙酯萃取,然后旋光仪蒸干,接着用乙腈溶解,上液相,分析最终产物、底物和副产物。本身觉得应该没有问题,但因为分离提取没系统研究过,审稿人的建议看不懂。请高人解释。
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wwjdwwjd

铜虫 (职业作家)

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准博士: 金币+20, 博学EPI+1, ★★★很有帮助 2015-01-02 19:35:08
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