查询词典 petroleum

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%。

Insol in cold water, petroleum ether, ether, benzene and chloroform.

不溶于石油醚、乙醚、苯和氯仿等非极性溶剂。

Soluble in diethyl ether, petroleum ether and other unpolar solvents., insoluble in water

能溶于乙醚、石油醚等非极性溶剂，不溶于水。

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。

Old-fashioned（12） petroleum jelly will do.

用传统的凡士林就行了。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。