查询词典 petroleum ether
- 与 petroleum ether 相关的网络例句 [注:此内容来源于网络,仅供参考]
-
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。
-
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%。
-
Using petroleum ether as defatted solvent, there did not affect the analysis of flavonoid.
以石油醚作为蜂胶奶粉前处理之溶剂,不会影响到测试结果。
- 推荐网络例句
-
He and Nina moved to California and lived at 2005 Ivar Street, Apt.
他和Nina搬到加州,并在2005年伊瓦尔街,公寓生活。
-
Droperidol ( potently inhibits transfected HERGchannels and this is the probable mechanism for QT prolongation.
氟哌利多有效地抑制了转染的 HERG 钾通道,可能是 QT 间期延长的机制。
-
The Nazi's cruel treatment of the Jews during the Second World War is beneath contempt .
二战期间纳粹对犹太人的暴行极其可鄙。