十字花科植物种子中莱菔硫烷的薄层色谱鉴别

用正己烷-醇体积比为5∶5的混合溶剂作为展开剂,碘蒸汽为显色剂,建立了十字花科植物中莱菔硫烷薄层色谱定性分析的方法。并运用相同的方法对甘蓝和白菜种子的粗提液进行鉴别,实验表明甘蓝种子中含少量莱菔硫烷,白菜种子中几乎不含这种物质;并用HPLC对其进行分析验证。该方法操作简便,专属性强,斑点清晰,无需大型仪器和特殊试剂,适用于多个样品的低价快速检测。     

A review of chromatographic methods for determination of synthetic food dyes

The purpose of this work was to present a chromatographic methods to analyse synthetic food dyes. The following techniques has been described: thin-layer liquid chromatography (TLC), high performance thin-layer chromatography (HPTLC), traditional column chromatography, high performance liquid chromatography (HPLC), include: ion-pair chromatography (HPLC IP), reversed phase chromatography (RP HPLC) and high performance ion chromatography.     

Eutectic Thin-Layer Chromatography as a New Possibility for Quantification of Plant Extracts—A Case Study

Deep eutectic solvents (DES), compared to classic ones, have interesting properties, such as the ability to solubilize compounds differing in polarity or increased dissolution of selected chemical compounds. They also offer specific interactions between the mobile and stationary phases. Those features make them promising solvents in chromatographic techniques, including the use in the separation of complicated samples. The first quantitative analysis with eutectic thin-layer chromatography (TLC) is presented in the paper. As a case study, five alkaloids from Chelidonium maius were selected as target compounds. A wide range of terpene-based DESs was investigated to develop the chromatographic system, both pure and after dilution. Moreover, a novel approach was employed to adjust polarity, involving mixing DESs differing in chromatographic properties. This procedure has proved to be effective. The best results were obtained with a 2:1 (wt/wt) mixture of DESs: camphor + phenol and menthol + limonene, with a 20% addition of methanol. The chromatographic system was validated and checked on the real sample, which made it the first applicable and operational quantitative eutectic TLC system.     

葛根不同部位中葛根素含量研究

目的：测定葛根不同部位中葛根素的含量,并评价葛根药材不同部位的质量。方法：采用薄层色谱法进行鉴别,高效液相色谱法进行含量测定。薄层色谱条件：硅胶GF254板,展开剂为三氯甲烷-甲醇-水（7∶2.5∶0.5）,置紫外光灯254nm下检视。高效液相色谱条件为Agilent ZORBAX SB C18色谱柱（4.6mm×150mm,5μm）,流动相为甲醇-水（27∶73）,检测波长274nm,流速1.0ml/min,柱温25℃。结果：测定了葛根药材不同部位中葛根素的含量。葛根素在0.05～1.00μg范围内呈良好的线性关系,r=0.9998,RSD为0.73%。结论：葛根不同部位葛根素含量大小顺序为：藤、根、果,叶和花中未测出葛根素。     

基于SPI总线的高精度数据采集器

介绍了采用TLC2543串行A／D转换芯片设计的一种基于SPI总线的数据采集器，并给出了TLC2543C的工作时序和采集器的软件流程图。该采集器应用在温度测试、压力测试、环境参数监控等测试监控仪器仪表中，具有分辨率高、采集稳定性高和系统扩展灵活的优点。     

黑龙江汉麻叶中化学成分研究与大麻二酚（CBD）含量测定

研究黑龙江汉麻叶中相关化学成分,建立大麻二酚(CBD)含量检测方法.采用硅胶柱色谱、C18反相中压柱及半制备色谱对汉麻叶乙酸乙酯提取物进行分离纯化,得到5个单体化合物,经核磁NMR解析确定结构为:大麻二酚(CBD)、大麻萜酚(CBG)、大麻酚(CBN)、Δ9-四氢大麻酚酸(Δ9-THCA)、大麻色烯(CBC);以石油醚-二氯甲烷(1∶1)为展开剂,采用碘和1%香草醛乙醇-硫酸(10∶1)分别显色,建立了CBD薄层色谱(TLC)检测方法;以乙腈-0.05%磷酸溶液(80∶20)为流动相,选择CBD吸收峰较高的检测波长,建立了CBD高效液相色谱(HPLC)检测方法;该方法在3.125～100μg/mL线性关系良好(R~2=0.9997),平均回收率为103.69%,RSD 1.32%(n=5).     

青羊参饮片的薄层色谱鉴别方法及浸出物限度标准

建立了青羊参饮片的薄层色谱鉴别方法.此法以青羊参饮片为供试样品，采用硅胶G薄层板、青羊参对照药材为对照、超声处理供试品溶液和对照药材溶液30 min、环己烷-乙醚-乙酸丁酯-冰醋酸（20∶6∶3∶0.2）作为展开剂展开，在365 nm紫外灯光下检视.结果显示，15批青羊参饮片的色谱与青羊参对照药材色谱一致，此薄层色谱鉴别方法稳定、简便，可用于青羊参饮片的鉴别.按《中国药典》2020年版规定方法之冷浸法检测青羊参饮片水溶性浸出物，结果显示，15批青羊参饮片的水溶性浸出物质量分数为15.55%～22.96%，因此建议青羊参饮片的浸出物限度检查标准定为“不得少于15.0%”.