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Phoebe321

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[求助] 求教做文中GCMS测试前为什么要这么处理?

The extracts (3 mg) were trimethylsilylated with 200L of bis-(trimethylsilyl)-trifluoroacetamide with 1% trimethylchlorosilane (TMCS) and 100L of toluene at 75 ◦C for 30 min. The reaction mixture was allowed to cool, evaporated under continuous N2 flush, and re-dissolved in hexane for analysis.
我是直接试样溶解在乙醇中的,结果和上文的结果完全不一样的
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