solvent ether

Methods The Bulbus Fritillariae medicinal materials were dipped in 18% ammonia solution, then the alkaloids were extracted by ultrasonic using the mixed solvent of ether-chloroform-ethanol ( 25 ∶ 8 ∶ 2.5).

方法用18%氨水润湿贝母药材，乙醚-氯仿-乙醇（25∶8∶2.5）混合溶剂超声提取其中贝母生物碱，将提取物直接进样到电喷雾离子阱质谱检测器进行正离子全扫描分析。

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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.

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。

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Bis ( diphenyl methyl) ether was synthesized under microwave irradiation by dry reaction at ambient pressure. The rate of reaction was dramatically accelerated and high yield was obtained, comparing with that of methods using organic solvent as medium or using dry reaction by conventional heating.

在常压下用微波辐射固相反应的方法合成了二苯基甲基醚，与用有机溶剂为介质及传统的热固相反应方法相比，其反应速率快，产率高。

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One new solvent free impregnating resin based on unsaturated polyester with modified diphenylene ether is prepared.

以改性二苯醚树脂为原料,合成了一种新颖不饱和聚酯型无溶剂浸渍绝缘漆.

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Purification of diphenyl ether by crystallization without solvent is discussed.

用无溶剂结晶法纯制二苯醚,该方法具有高效、经济和洁净的特点.

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The p-tolyl benzyl ether was synthesized by reaction ofp-cresol and benzyl chloride in95% ethanol as solvent and under microwave irradiation.

以95%的乙醇为溶剂，以氯化苄和对甲苯酚为原料利用微波辐射加热合成对甲苯基苄基醚。

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Sample of eel-bone oil was extracted with a mixed solvent of ether and n-hexane and the extract was esterfied by KOH-CH_3OH. Then it was determined by capillary GC/ MS.

用乙醚／已烷混合溶剂抽提鳗鱼骨油，用KOH－CH3OH酯交换法甲酯化，以毛细管色谱／质谱方法测定脂肪酸的组成。

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A one-component combining adhesive for earthwork films was made from the thermoplastic poly-ether-polyureghane ( as the main material), modified resin, mixed solvent and anti-aging agent.

以聚醚型热塑性聚氨酯为基料，配以改性树脂、混合溶剂和防老剂，制成了一种单组分土工膜复合胶粘剂。

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Compared the spectrogram , that the petroleum ether used as solvent is better than anther.

通过气相色谱分析的谱图比较, 发现石油醚的提取效果较好.

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