The Enantiomer Separations of Allethrone and Propargyllone Using Two Long Chain Acylated b-Cyclodextrin Derivatives as CGC Capillary Stationary Phases

Using two b-cyclodextrin derivatives (CDs) with long chain of acyl groups as chiral stationary phases (CSPs) of capillary gas chromatography (CGC), the enantiomers of racemic allethrone and propargyllone were well resolved after derived with acetyl chloride. The enantiomer excess values (e.e.%) of 1S-allethrone and 1S-propargyllone were also determined successfully using these CDs.

Determination of Camylofin Dihydrochloride and Nimesulide in Pharmaceutical Preparation by Gas Chromatography

This research paper describes simple analytical method for determination of Camylofin dihydrochloride and Nimesulide in tablet formulation by Gas chromatography method. Benzoic acid was used as internal standard. Validation was carried out in compliance with the International Conference on Harmonization guidelines. The method utilized GC (Agilent Technologies 6890 N Network GC system with FID detector), and RTX-5 capillary column (5% diphenyl-95% dimethyl polysiloxane), 30 m × 0.53 mm, 1.5 μm as stationary phase. Helium was used as the carrier gas at a flow rate of 1.5 mL?min–1. The proposed method was validated for linearity, LOD, LOQ, accuracy, precision, ruggedness and solution stability. It can be conveniently adopted for routine quality control analysis.

毛细管气相色谱在农药分析中的应用

本文介绍了毛细管气相色谱的特点，与填充柱气相色谱的不同。论述了毛细管气相色谱 的三大优点以及促成这些优点的内外在因素。收集了毛细管气相色谱在农药分析中的一些应用 实例。对１８个ＣＩＰＡＣ毛细管气相色谱的分析条件进行了汇总并作了简要概括。

毛细管柱气相色谱法测定白酒中乙酸乙酯和乙缩醛

白酒中乙酸乙酯与乙缩醛由于极性极为相近,在极性毛细管柱上无法实现分离。分析过程通过加无机酸水解法对酒样进行预处理,屏蔽掉乙缩醛的干扰,乙酸乙酯形成孤峰,进行定量分析,然后以牺牲分析时间为代价,二次进样,最终实现包括乙酸乙酯、乙缩醛在内的白酒全组分分析,该方法经济、简便、易行。