查询词典 sulfur ether

The purpose of this study is petroleum ether (30℃-60℃) the optimum extraction of artemisinin-based research, as well as by ultraviolet-visible spectrophotometer in the artemisinin content of Artemisia annual samples.

本研究主要是对石油醚（30℃-60℃）提取青蒿素的最佳工艺的研究以及用紫外-可见分光光度计对青蒿中青蒿素含量的测定。

Soluble in acetone, benzene, toluene as organic solvents, soluble in petroleum ether and carbon tetrachloride.

溶于丙酮、苯、甲苯等有机溶剂中，难溶于石油醚和四氯化碳。

Liquefied petroleum gas and dimethyl ether are Group A dangerous chemicals.

液化石油气和二甲醚均属甲类危险化学物品。

Purified by petroleum ether instead of benzene, the results had no obvious difference.

与用苯作为洗脱剂方法测定结果比较，两者无显著性差异。

The organochlorine pesticide were extracted with acetone and petroleum ether, and purified with sulfuric acid.

用丙酮提取样品中残留的有机氯农药，石油醚萃取，萃取液以浓硫酸净化。

By steam distillation and petroleum ether extraction,respectively,and the chemical constituents of the volatile oils were analyzed and identified by GC-MS.

分别采用水蒸气蒸馏和石油醚萃取法提取白花茵陈中的挥发油，并通过GC-MS对其化学成分进行了分析鉴定。

Methods Less toxic solvents such as cyclohexane, n-hexane, petroleum ether and chloroform were compared with benzene and toluene.

用毒性较小的溶剂环己烷、正己烷、石油醚和三氯甲烷等取代苯或甲苯。

Methods According to the operation step of instrument hook, samples of 6 kinds of moon cake were tested with three different extraction conditions, and the results were compared with the result of national standard method. With the extraction condition of 105°C/petroleum ether, there was no significant.

选取6种不同种类月饼样品，在3种不同的提取条件下，按照说明书的操作步骤进行测定，然后将3种条件下的实验结果与国标法结果进行比较。

Results Cyclohexane, n-hexane, petroleum ether and chloroform had the same or better results in thin-layer chromatography.

结果 可获得等同效果或效果更好的薄层色谱。

The results showed that the optimal process was degreasing treatment with petroleum ether, dialysis for 48 h, the content of protein was 93.70%.

研究表明：鸡肉干燥粉直接进行石油醚脱脂和透析48 即为鸡肉蛋白的最佳提取工艺，其蛋白质含量可达到93.70%。

The Porsche Owner: But it's my car!

可，这是我的车呀。

LOX_83}{Oh, another bunch of wackos.

{LOX_83}{呃，又一群怪人。