Tetrachloro-methane is also a common good chemical organic solvent; and often used as the extractive agent in chemical experiments.
四氯甲烷也是一种较常见的化工原料，是一种良好的有机溶剂，在化学实验中常被作为萃取剂等。
Compared with common sample pretreating method of organic solvent extraction, this method showed the advantages of simple procedure, very little loss of analyzed sample, rapidity and sensitivity.
相比目前常用的有机溶剂萃取的样品处理方法，该方法显示了步骤简单、待分析物损失量小和快速灵敏的优点。
The present invention is the medicinal use of common valeriana extractive with methanol or other organic solvent.
本发明是北缬草有机溶剂提取物的医药用途，其特征是具有镇静安眠作用。
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