Objective to determine organic solvent residual volume in felodipine raw material by headspace gas chromatography.
目的建立测定非洛地平原料药中有机残留溶剂的顶空气相色谱法。
Conclusion: the developed method is simple, sensitive, and accurate for the residual solvent analysis in raw material drug of tetracaine hydrochloride.
结论：本方法简单、灵敏、可靠，适用于盐酸丁卡因原料药中残留溶剂的分析检测。
Oil - displacement surfactants OCS - 1 and OCS - 2 were prepared using vacuum residual oil from Daqing and Dagang as raw material respectively.
利用大庆减压渣油和大港减压渣油分别制备出驱油用表面活性剂ocs - 1和ocs - 2。
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