石油醚

The costuslactone and dehydrocostuslactone in the supercritical CO 2 extract of aucklandia were identified by TLC using a mobile phase of petroleum ether,ethyl acetate and benzene (70∶5∶15) and the colour developing reagent of 5% vanillic aldehyde dissovled in sulfuric acid.

用薄层色谱法，以ψ(石油醚∶乙酸乙酯∶苯)=70∶5∶1 5为展开剂，质量分数为 5 %香草醛硫酸为显色剂对木香超临界萃取物中的木香烃内酯与去氢木香内酯进行鉴别；并建立高效液相色谱法同时测定木香烃内酯与去氢木香内酯的含量方法。

Result: Make sure the best condition to obtain total flavonoids was extraction by sonication and defatting 3 times with an 15 times volume of petroleum benzin.

结果：优化工艺为：以超声的方法，15倍量石油醚脱脂30min，重复3次；再用6倍量80％乙醇提取，第一次提取2h，第二次提取1.5小时。

The extracted liquor was then concentrated under vacuum and degreased with petroleum ether.

然后将提取液集中在烧杯中石油醚进行脱脂。

The results for rubber seed oil refining were as follows: For the crude solvent-extracted oil, it was first degummed 20 min by 0.04% H3PO4 at 60℃, and neutralized 10 min by 0.15% CaCO_3, then treated with 5% bleaching clay, and refined oil could be obtained. For the machine-squeezed oil, it was first degummed 20 min by 0.04% H3PO4 at 90℃, and neutralized 10 min by 0.15% CaCO3, then treated with 15% bleaching clay, and refined oil could be obtained.

橡胶籽油精炼结果表明：溶剂尤其是以石油醚等提取毛油的色泽最好；溶剂提取毛油在60℃下、0.04%的H_3PO4(含量为85%)、20min脱胶和0.15%的CaCO3中和搅拌10min后，再在20min、油重5%白土脱胶脱色较好；机榨毛油在90℃下、0.04%的H3PO4(含量为85%)、20min脱胶和0.15%的CaCO3中和搅拌10min后，再在20min、油重15%白土脱胶脱色的精炼机榨油次之。

Hemp fruit were extracted with petroleum ether,and the extract hemp fruit oil was saponified and esterfied with methanol.

为了开发火麻仁资源，用石油醚提取火麻仁油，经皂化、甲酯化处理，GC MS联用对其脂肪酸组成进行了分析和鉴定。

The method: First of all, with 95%, respectively, ethanol, petroleum ether (60 ℃-90 ℃), acetone, chloroform and other organic solvents for extraction of total pigment shikonin ability to inspect, the better the selection of solvent extraction, and then choose extraction dynamic orthogonal extraction were optimized in order to Shikonin total extraction rate for the pigment inspection targets, optimization of the extraction of the best ways.

首先分别用95%的乙醇、石油醚(60℃-90℃)、丙酮、氯仿等有机溶剂对紫草总色素的提取能力进行考察，筛选出较佳的提取溶剂，再选用浸提法、动态提取法分别进行正交优选，以紫草总色素的提取率为考察指标，优选出最佳的提取方式。

Compared the extraction effects of yellow pigment from the corn protein powder by 95 %ethanol,isopropanol,chloroform,acetone,ac-Etylace,petroleum benzene,distilled water.

利用索氏提取法比较95%乙醇、异丙醇、氯仿、丙酮、乙酸乙酯、石油醚和蒸馏水提取玉米粗蛋白粉黄色素的效果，结果发现95%乙醇为最佳溶剂，95%乙醇提取液λmax为446nm。

Castor seeds were degreased with 3 kinds of solvents including petroleum ether, aether and methylene chloride, and ricins were extracted from the defatted castor cake with acetic acid solution. And the rat-killing activities of 3 kinds of ricins were compared in the rat-killing activity test.

方法］用石油醚、乙醚、二氯甲烷3种溶剂分别对蓖麻粗籽进行脱脂后，用醋酸水溶液从脱脂的蓖麻饼中提取蓖麻毒蛋白，通过杀鼠活性试验比较3种蓖麻粗毒蛋白的杀鼠活性。

Castor seeds were degreased with 3 kinds of solvents including petroleum ether,aether and methylene chloride,and ricins were extracted from the defatted castor cake with acetic acid solution.

方法用石油醚、乙醚、二氯甲烷3种溶剂分别对蓖麻粗籽进行脱脂后，用醋酸水溶液从脱脂的蓖麻饼中提取蓖麻毒蛋白，通过杀鼠活性试验比较3种蓖麻粗毒蛋白的杀鼠活性。

The optimum conditions are as follows: the / 1.0, temperature 55.0℃, pH value 8.0 for the autolysis process and the amount of petroleum ether 75mL, pH value 4.0, temperature 40℃ and time 20 minutes for the extraction one.

结果表明，在最优自溶酶解工艺/=1.0，t=55.0℃，pH8.0和最优萃取工艺：萃取时间25min，石油醚量为75mL，萃取温度40℃，pH4.0下提油率为56.42%。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。