研究人员使用的方法是将咖啡渣隔夜使其干燥，然后放入一些常见的化学溶剂中，例如正己烷、乙醚和二氯甲烷，来溶解咖啡渣中的油类成分。
The researchers start off by drying their coffee grounds overnight and then pour in some common chemical solvents, such as hexane, ether and dichloromethane, to dissolve the oils.
蜂蜜样品用水溶解后，经正己烷-二氯甲烷提取，提取液经c18固相萃取小柱净化，采用气相色谱仪电子捕获检测器定量测定。
The honey samples were dissolved in water and acetone and then extracted with hexane - chloromethane, cleaned by C18 SPE cartridge, determined by gas chromatographic electronic capture detector.
建立了毛细管气相色谱法测定甲磺酸齐拉西酮中残留溶剂乙醇、异丙醇、二氯甲烷、正己烷、四氢呋喃、D MF、丙二酸二甲酯的残留量。
A capillary GC method with FID detector for the determination of residual organic solvents ethanol, isopropanol, dichloromethane, n-hexane, tetrahydrofuran, DMF and dimethyl malonate was established.
溶剂采用环己烷、1,2 -二氯乙烷、吡啶中一种或多种混合使用。
The solvent is used by adopting one of or mixture of more than one of cyclohexane, 1, 2-dichloroethane and pyridine.
以二氧杂环己烷为溶剂，通过聚乙二醇2 70与对甲基苯磺酰氯反应合成了1 8冠6，产率64 .4 %。
Also, in dioxane solution, 18Crown6 was prepared in 64.4% yields by reaction of polyethylene glycol 270 and ptoluenesulfonyl chloride.
以二氧杂环己烷为溶剂，通过聚乙二醇2 70与对甲基苯磺酰氯反应合成了1 8冠6，产率64 .4 %。
Also, in dioxane solution, 18Crown6 was prepared in 64.4% yields by reaction of polyethylene glycol 270 and ptoluenesulfonyl chloride.
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