1) petroleum ether portion
石油醚萃取部分
1.
Column chromatographic techniques were used for the isolation and purification of the chemical constituents of petroleum ether portion and n-butanol portion from methanol extract of the branches and leaves of hemp, and the structures were elucidated by means of MS and NMR spectroscopies.
从工业大麻甲醇提取物的石油醚萃取部分分离鉴定了14个化合物,分别为β-谷甾醇(1)、豆甾醇(2)、二十二烷酸甲酯(3)、?5,22-豆甾醇乙酸酯(4)、α-菠菜甾醇(5)、表无羁萜醇(6)、无羁萜酮(7)、四氢大麻酚(8)、大麻二酚(9)、大麻二酚酸(10)、cannabielsoic acidA(11)、大麻酚(12)、催叶萝芙叶醇(13)和去氢催叶萝芙叶醇(14)。
2) petroleum ether extraction
石油醚萃取
1.
The volatile oils were obtained with supercritical CO 2,stream distillation and petroleum ether extraction.
采取超临界CO2 萃取、水蒸气蒸馏和有机溶剂石油醚萃取这三种方法提取石香薷挥发油。
3) petroleum either
石油醚部分
1.
Chemical constituents from the petroleum either fraction of ethanol extract of Broussonetia Papyrifera (L.) leaves.;
楮叶乙醇提取物石油醚部分的化学成分研究
4) LYQPE
六月青石油醚萃取物
5) Naphtha extraction
石脑油萃取
6) Petroleum Ether Extraction
石油醚提取
1.
Determination of Arsenic in Edible Oil by Digestion-Petroleum Ether Extraction and Hydride Generation Atomic Fluorescence Spectrometry;
消化-石油醚提取氢化物-原子荧光光谱法测定食用油中砷
2.
)Pok,in this paper the methods of water extraction,ethanol extraction and petroleum ether extraction were used.
采用水提取法、醇提取法和石油醚提取法对小甘菊花的化学成分进行了比较全面的定性实验。
3.
In this research, chemical constituents from the Clematis songarica Bge were obtained were obtained with the method of water extraction, ethanol extraction and petroleum ether extraction.
本实验采用水提取法、醇提取法和石油醚提取法对准噶尔铁线莲的化学成分进行了定性研究。
补充资料：石油醚
石油醚是石油的低沸点馏分，为低级烷烃混合物。按沸点不同分为30-60 ℃、 60-90℃、90-120 ℃ 3类。无色透明易挥发液体，有类似乙醚气味．相对密度0.669，沸点60-90 ℃。溶于丙酮、醋酸乙酯、苯、氯仿、乙醚等，不溶于水。易燃。无毒。空气中最高容许浓度为0.03％。
用作快干溶剂和稀释剂。贮存于阴凉、通风、干燥的库房内，远离火种、热源。
用作快干溶剂和稀释剂。贮存于阴凉、通风、干燥的库房内，远离火种、热源。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条