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介绍一种干法填充5μ或3μC_(13)担体,制备高效液相石英毛细芒填充柱的方法。用乙醇做去静电剂,压缩气体为动力填充了Spherisorb ODS-1,Spherisorb ODS-2和Hypersil ODS.柱性能用折合塔片高度╱折合流速和分离阻抗指标衡量。与匀浆法比,干法制柱可得到相似或更高柱效,更好的柱稳定性。所需设备简单、省时。 相似文献
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In this paper, the enthalpy-entropy compensation effect in the enantiomeric separation by modified cyclodextrins (CD) and diamide chiral stationary phase (CSP) gas chromatography was investigated using the method of plotting △(△H) versus △(△G) rhm combined with t-test statistic analysis. The investigated racemates cover α-phenylethylamine and its analogs, 2-alkylamines, chiral acyclic alcohols, halogenated arylethanediol-1, 2-diperfluoropropionates, amino acid and its analogs, and two series of compounds containing chloro and bromo substituents. From the compensation analysis results, the effects of the diluent composition in the investigated chiral stationary phases, the size and the modified groups on investigated cyclodextrins, the derivatization methods and the groups attached to the stereocenters on enantiomeric separation mechanisms were all discussed. 相似文献
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一种新型治疗精神病的药物,氯氮平(Clozapine)在临床上得到了广泛应用。它是一种作用强,见效快的抗精神分裂症的幻觉,妄想、紧张状态而付作用小的药物。服这种药不产生锥体外系的并发症。适当地增加药量,抗病作用明显增强;服药过量则结果相反。因此,随时检测患者血液中含药浓度,以合理控制用药量,在临床治疗中非常重要。 本文采用薄层色谱法,采血样可测出血液中的药物浓度。其方法简单快速,准确。灵敏度高。实验中对血样预处理,薄层展开及扫描条件进行了选择,测定了标准浓变曲线,并实际测定了患者血液中氯氮平的浓度。 相似文献
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