closed differential是什么意思

用法例句

Trace amount of mercury in vegetables was determined by cold-vapour atomic fluorescence spectrometry with airtight microwave digestion by HNO3/H2O2.

采用硝酸和过氧化氢体系,密闭微波消解,冷原子荧光光谱法测定蔬菜中的痕量汞,选择0。

A closed-vessel microwave digestion method is described for the rapid dissolution of samples.

　对环境试样中汞的密闭微波消化方法进行了研究。

A detail procedure for extracting anthraqinones from Rhubarb was developed by using an obturated microwave-assisted extraction(MAE)device with a pressure controlling unit.

利用具有压力控制附件的密闭微波萃取装置,提取大黄中的蒽醌类化合物。

The harpagoside from the radix scrophulariae were extracted by means of microwave-assisted and airtight solvent extraction.

应用密闭微波辅助提取法提取玄参中有效成分玄参苷,考察了微波提取条件(包括溶剂、样品粒径、提取时间、固-液质量体积比和提取次数等)对玄参中提取玄参苷收率的影响,结果表明:溶剂为70%乙醇,玄参的粒径为180目,提取时间为10 m in,料液比为1∶20及提取次数为2次时,玄参苷的提取率最佳。