气相色谱相邻组分分离度与柱温关系的计算机模拟实验

仪器分析是化学及化学相关专业的一门专业基础课程。由于仪器分析实验所用的仪器大多价格昂贵 ,而且分析仪器的发展更新很快 ,使仪器分析实验课明显存在着仪器短缺 ,实验开设不足 ,虽投入人力较多 ,但教学效果却不理想等问题[1] 。利用计算机辅助色谱分析实验教学是解决这个问题的好办法。我们开发了一套“计算机模拟色谱分析实验”软件 ,用于教学实践 ,效果良好。现介绍其中的计算机模拟柱温对气相色谱组分保留值及相邻组分分离影响的实验。1　理论部分　　在气相色谱分析中 ,当固定相选定后 ,柱温就成为最重要的操作参数 ,组分的调整保留…     

“追求无限 创造卓越”安捷伦科技参加HPLC 2011 & 18th NSEC

在2011年10月8日至11日召开的第2届大连国际色谱学术报告会及仪器展览会(包括第37届国际高效液相色谱及相关技术会议(HPLC 2011 Dalian)暨第18届全国色谱学术报告会(18th NSEC))上,安捷伦公司作为大会特别铂金赞助公司和独家冠名优秀青年科学家奖的公司,不仅以追求无限创造卓越(Infi-     

气相色谱法测定水生植物中的阿特拉津残留

确立了一套检测水生植物中阿特拉津残留量的方法.样品经石油醚-二氯甲烷混合液振荡萃取,经硅镁吸附剂层析柱净化后,采用气相色谱-电子捕获检测器检测水生植物中阿特拉津的残留量.该方法在0.062～1.0mg/L范围内峰面积与阿特拉津浓度的线性关系良好(r~2=0.9993).在0.5mg/L、1.0mg/L、1.5mg/L ...     

简讯

裂解气在线色谱分析获重大突破由天华化工机械及自动化研究设计院和扬子石化公司联合承担完成的中石化科技攻关项目---乙烯裂解装置在线色谱分析系统研发与服务,日前在北京通过中石化组织的技术鉴定。在线色谱分析仪稳定运行可为优化乙烯生产、提高乙烯收率提供重要的控制数据,是乙烯装置关键的工艺参数之一。据介绍,该技术针对石化装置裂解气在线色谱分析仪运行不稳、取样数据不够精确的问题,在原取样器的基础上首创出二次旋风分离     

Advances in chromatographic analysis of ginsenosidesEI北大核心CSCD

Ginsenosides possess pharmacological activities such as anti-aging，cardiovascular protection，and improving immunity. However，the detection and analysis of ginsenosides commonly suffer from the problem of low sensitivity owing to the complex matrix and low content of ginsenosides. Chromatographic technology was often used to detect ginsenosides owing to the advantages of high accuracy，high sensitivity，good reproducibility and low sample consumption，etc. In this review，the application of chromatographic analysis technologies in ginsenosides detection was summarized. First of all，accuracy of test results for the ginsenosides can be effectively improved by using high performance liquid chromatography（HPLC）combined with various detectors. Secondly，the combination of HPLC with mass spectrometry can be utilized for qualitative and quantitative analysis of ginsenosides， as well as other fields， such as metabonomics， pharmacokinetics， intestinal microorganisms and quality control. Moreover，the application of gas chromatography in analysis of ginsenosides was reviewed. Briefly，with the continuous development of chromatographic technology，the degree of accuracy for ginsenosides detection was effectively improved，which is beneficial to realize the effective analysis of ginsenosides. © 2023, Youke Publishing Co., Ltd. All rights reserved.