screening of extractive method 方法筛选
extractive spectrophotometric method 萃取分光光度法
As an effective extractive method, ultrasound-assisted extraction has been widely used owing to its simplicity, ease of use, speed and enhanced safety.
超声波协助提取作为一种有效提取方法，因其简单、方便、快速和安全等优点得到了广泛应用。
The invention provides a long pepper total alkaloid extractive separated from long pepper and a preparation method thereof.
本发明提供了一种从荜茇中分离得到的荜茇总生物碱提取物，并提供了其制备方法。
As a new method of nickel extractive metallurgy, the process of chlorine leaching purification electrolysis for nickel sulphide concentrate usually USES solvent extraction as its purification.
硫化镍精矿氯气浸出—净化—电积工艺作为镍提取冶金的新方向，其净化过程大多采用溶剂萃取方法。
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