单词：precolumn
precolumn的用法和样例：
例句
- This study established the method of HPLC with precolumn UV-derivatization to determine the content of carnitine and carried out intimate technological research.本研究经详细的方法学研究，建立了精浆中游离肉毒碱的柱前紫外衍生高效液相色谱测定方法。
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