石油醚

对广东桑桑椹石油醚和乙酸乙酯提取物中的化学成分进行GC-MS分析。

Volatility chemical constituents of the extracts of mulberry ( Moms atropurpurea R. ) by petroleum ether and ethyl acetate were analyzed by GC-MS.

由此得出，快速搅拌法浸提印楝油的最佳条件是：溶剂石油醚、料液比1∶2.5（g∶mL，下同）、时间每次7min、浸提3次，出油率30.4%；

The optimized condition of rapid agitation extraction of neem oil was : petroleum ether solvent , components ratio 1 ∶ 2.5 ( g ∶ mL ), extraction time 7 min every time , for 3 times . The oil yield was 30.4 % .

方法：将样品点在硅胶C薄层板上，以石油醚-乙醚-甲酸（1：5：0.1）在室温下展开。

Methods : The sample was applied on a silica G plate and developed at room temperature with PE-Ether-Formic acid ( 1:5:0.1 ) .

石榴籽经石油醚提取、皂化和甲基化得到的总脂肪酸甲酯经GC分析，共检出9种成分。

Fatty acids compositions were determined from pomegranate seed oil by saponification , methylation and GC-MS.

从10%乙酸乙酯-石油醚部分分离得到甾醇混合物A，经GC-MS分析，分离、鉴定出7个甾醇化合物（1-7）。

Based on GC-MS analysis , seven sterol compounds ( 1 ~ 7 ) were identified .

桂枝：采用硅胶G板，以石油醚（60-90℃）&醋酸乙酯（17：3）为展开剂，显色剂为二硝基苯肼乙醇试液。

Cinnamon twig was identified with petroleum ether ( 60-90 ) - ethyl acetate ( 17:3 ) as developer and dinitrophenylhydrazine ethanol solution as coloration using silica gel G.

样品经50%（w）KOH直接皂化和石油醚萃取后进行色谱分析。

After directly saponified with 50 % ( w ) KOH , the sample was extracted with petroleum ether .

通过GC-MS分析了晶体Ⅲ、晶体D、晶体E和氯仿层组分Ⅰ石油醚相的化学成分。

The chemical components of crystal ⅲ, D , E and petroleum ether phase of part I in chloroform layer are analysised by GC-MS.

以乙醚-石油醚（1∶1）溶解栓剂，并用50%甲醇水溶液萃取，再经HPLC测定。

The Suppository was solved by ether : petroleum ether ( 1 ∶ 1 ), extracted by 50 % methanol aqueous solution , then determined by HPLC .

同时对超临界CO2流体萃取油样与石油醚萃取油样的品质进行了比较。

Meanwhile , the quality of the oil to be extracted from silkworm pupa by super critical fluid ( CO2 ) and petrolic aether was compared respectively .

先通过分级萃取的方法将IO按石油醚、丙酮、甲醇和水的顺序依次进行萃取。

The stepwise extractions of IO were performed using petroleum ether , acetone , methanol and water orderly .

首次研究了酶解大豆乳液在石油醚萃取时油脂分配系数的影响因素，实验表明乳液中的固形物浓度，蛋白的水解度，pH值及萃取温度对分配系数有明显影响。

The results showed that the concentration of solid substance in milk , hydrolysis degree of protein , p1-1 value and temperature of enzymatic hydrolyzed soybean milk influenced the distribution coefficient obviously .

方法：以甲醇、氯仿、石油醚为提取溶剂，提取中药材海金沙，采用粉末X射线衍射Fourier谱鉴定法对提取物进行分析鉴定。

Method : To get the extracts of Spora Lygodii using methanol , chloroform and petroleum ether as solvent and the extracts were identified 、 analyzed by X-ray diffraction Fourier fingerprint spectra .

根据不同的产物，柱层析的洗脱剂V（石油醚）：V（乙酸乙酷）从10：1到30：1不等。

Chromatography on silica gel with petroleum ether and ethyl acetate as eluent which ranges from 10:1 ( v : v ) to 30:1 ( v : v ) afforded oxime ether .

使用添加DBT的石油醚作为模拟油，H2O2为氧化剂，萃取法去除氧化产物。

Using petroleum ether adding DBT as model oil and H2O2 as the oxidant , then oxidation products are extracted .

九节菖蒲石油醚、正丁醇和水提取部位无镇痛活性。（4）建立了九节菖蒲中琥珀酸含量的HPLC测定法。

The petroleum ether , n-butanol and water extractive fractions had no analgesic activity . ( 4 ) An HPLC method for the determination of succinic acid in Irkutsk Anemone Rhizome was established .

结果显示，在薄层硅胶H为填充剂的干层析柱上，以石油醚-乙酸乙酯（15∶1）为洗脱剂，可以将大黄酚和大黄素甲醚分离。

The results indicated that they could be separated through silica gel H for thin layer chromatography as the stational phase , and petroleum aether and ethyl acetate ( 15 ∶ 1 ) as the mobile phase .

方法青蒿经石油醚提取浓缩，浸膏经过硅胶柱，用不同配比的乙酸乙酯洗脱，用TLC法跟踪，UV法检测。

Methods Artemisinin is extracted with petroleum ether and pass column of silica gel and gradient elution with ethyl acetate , then it is tracked with TLC and detected with UV-VIS .

经测定并比较超临界CO2萃取法和石油醚冷浸提取法萃取的破壁和未破壁油菜蜂花粉油的理化性质，超临界CO2萃取法是较为理想的提取方法。

It was testified by determining the physical-chemical properties of wall-broken and wall-unbroken rape bee pollen oil and then comparing them that supercritical CO2 extraction was better than petroleum ether cold soak extraction .

CS2与石油醚萃余煤作用36h后，某段特定链长的脂肪烃爆发性大量溶出。

After CS2 and the PE-residue reacted for 36 h , some specific long-chain alkanes dissolve explosively .

极性溶剂如四氢呋喃会溶解PEI层，而非极性溶剂如石油醚又不能溶解丁烯酸钴。

Electropolar solvent such as THF may destroy the polyetherimide layer , while non-electropolar solvent such as petroleum ether cannot solve vinyl acetic acid cobalt .

确定了利用同时蒸馏提取法提取植物精油AA的最优条件为：石油醚为提取溶剂，同时蒸馏提取240min，所得精油得率为0.52%。

Using the method of simultaneous distillation-extraction to extract AA oil , the optimum craft is : petroleum ether for extract solvent , distillation for 240 min. Extraction rates is 0.52 % .

结果表明，以90%石油醚为提取剂在70～80℃索氏提取4h除脂效果最好；

The results showed that the optimal condition was using Suo surname fat extraction apparatus with 90 % petrol at 70 ~ 80 ℃ for 4h .

生长曲线法观察发现蛇六谷石油醚萃取物、乙酸乙酯萃取物对人胃癌SGC-7901细胞增殖抑制作用有一定的时间-效应曲线；

Growth curve method showed the extract of petroleum ether and ethyl acetate of Rhizoma Amorphophalli had a time-effect effect on the proliferation of cell SGC-7901 .

蛴螬石油醚提取物诱导凋亡作用可能与下调Bcl-2表达，上调Bax、caspase-8和caspase-3表达有关。

The mechanism of the grub petroleum ether extract inducing apoptosis for HeLa might be related to down-regulation of Bcl-2 expression and up-regulation of Bax , caspase-8 , and caspase-3 expressions .

三萜醇乙酸酯和4-甲基甾醇乙酸酯是采用20%硝酸银-硅胶G薄板，并用二氯甲烷-石油醚（8：2v/v）作展开剂进行分离的。

The acetates of triterpene alcohols and 4-methylsterols are separated by TLC with 20 % silver nitrate impregnated silica gel G , using CH_2CL_2-petroleum ( 8:2v / v ) as developing reagents . The identification of major components is carried out by TLC , m.

结果：（1）大枣粗糖用石油醚脱脂、酶-三氯乙酸-正丁醇联合应用脱蛋白、H2O2脱色和乙醇沉淀。

Results : ( 1 ) The coarse jujube polysaccharides were preliminarily purified by means of skellysolve G degrease , enzyme unite chloroacetic acid butanol to remove protein , H2O2 depigmentation , ethanol precipitation .

采用正交试验得出石油醚脱脂的最佳组合为：25℃，pH7.0，浸提10h；

Through orthodoxy experiment , the best condition of defat is : temperature at 25C , pH7.0 , defat 10 hours .

根石油醚粗提物对棉铃虫[Helicoverpaarmigera（Hubner）]5龄幼虫触杀死亡率为50.0%。

Death rates of contact effects on extract of petroleum ether from roots against fifth instar larvae of Helicoverpa armigera ( Hubner ) was 50.0 % .

方法：以棉酚提取率和含量为指标，应用正交试验设计法优选棉酚的最佳精制工艺，考察了乙醚用量（A）、石油醚（B）用量、放置时间（C）3个因素。

Method : the extraction rate and content were as the targets , orthogonal design test was applied to optimize the best refining technology for gossypol , the three factors , dosage of ethylether ( A ), dosage of ligroin ( B ); standing time ( C ), were determined .