气相色谱法测定五水硫酸铜的脱水机理

目前,许多学校化学系开设的“配位化学”实验中一般采用了经典的差热—热重法检测配合物热分解过程的实验。气相色谱作为一种常用的分析测试手段,对于非分析专业的学生来说,除了在基础分析化学课程中有所涉及外,很少有动手实践的机会。把气相色谱引入配位化学实验,既可以使学生巩固前面课程所学气相色谱原理及操作方法,同时也使学生了解到色谱法在无机化学领域     

基于考古情境的化学综合实践活动设计——“考古”陶片中残留油脂的检测

针对实际考古问题进行分析,提炼实践活动主题,围绕"考古陶片中残留油脂的分析检测"这一主题设计化学综合实践活动。通过陶片中残留油脂的分析检测,引导学生了解化学技术手段在考古中的跨学科应用。学生通过实验操作提取"考古"陶片中的脂肪酸残留,并将其交换为脂肪酸甲酯,通过气相色谱进行表征,最后结合陶片及其考古背景分析陶片的使用情况。该实验可向化学、生物化学、人类学以及考古等专业学生开放,可帮助学生了解并掌握样品分离和制备、衍生化、气相色谱和多组分样品分析等方面的基本概念和实践操作。     

《现代毛细管柱气相色谱法》简介

由吴采樱和曾昭睿编著的《现代毛细管柱气相色谱法》一书1990年经武汉大学出版社出版。该书可作为大专院校高年级学生和研究生色谱课程的主要参考书,也可供科研、厂矿实验室从事色谱分析的人员参考读物。该书是国内第一本既有系统理论知识,又有方法、仪器和应用等内容的毛细管柱气相色谱专著。全书分为十一章对基本理论、制柱技术、固定液特性、检测器的原理和结构,进样方法以及应用等方面做了较     

气相色谱-质谱联用法实验教学设计的探索与实践

阐述如何有效地设计气相色谱-质谱联用法实验教学系统,包括教学内容的设计原则、有效实施以及教学效果评价;介绍了几个适用于本科生和研究生教学的气相色谱-质谱联用分析实验。     

微机及自制气相色谱仪用于填充柱效能的测定——大学基础课仪器分析实验

气相色谱柱效能的测定常被列为实验教学内容。对初次接触气相色谱法实验的学生,由于实验学时数的限制,往往采用简单、直观的色谱装置比使用商品仪器能取得更好的实验教学效果。有人使用极其     

仪器分析综合实验:固相微萃取纤维的制备及在有机氯农药富集和分析中的应用*

设计了一个综合性仪器分析实验:固相微萃取纤维的制备及应用。实验内容包括微孔有机聚合物固相微萃取纤维的制备、红外光谱表征、固相微萃取实验条件优化和气相色谱测定有机氯农药含量等4个部分。通过综合运用多种仪器分析实验手段,加深了学生对分离富集技术的了解,巩固了学生对仪器分析课程中的气相色谱法、红外光谱法相关内容的掌握,培养学生构建一个完整、科学的仪器分析操作流程,形成综合性思维能力。     

气相色谱虚拟实验研究

气相色谱虚拟实验具有节省实验消耗、不受时间等外界条件限制的优点,但又有不利于对实验仪器感性认识、无法实现某些实验步骤等缺点。针对气相色谱实验的三个层次分析了虚拟实验的可行性,并给出了虚拟实验方案。     

综合型有机化学实验:4,4-二苯基-3-丁烯-2-酮的合成、纯化及表征

以乙酰乙酸乙酯为原料,利用酮羰基选择性保护及去保护的方法,制备4,4-二苯基-3-丁烯-2-酮。实验涉及无水无氧、减压蒸馏和柱色谱层析等操作。该实验合成路线成熟,产物易于纯化且产率高,结合了分子结构的波谱解析,对于学生有机合成实验能力的培养和加深对波谱理论知识的理解和应用,具有很好的教学效果。     

协作式实验教学模式在仪器分析实验中的探索推广——以气相色谱-质谱联用实验为例

以气相色谱-质谱联用实验为例,阐述协作式实验教学模式在仪器分析实验教学中的应用。通过团队协作的方式,激发学生参与实验的热情,提高学生的团队协作能力和竞争意识,提高实验教学质量。     

天然产物吴茱萸碱一锅法合成的综合实验设计

结合天然产物全合成的理论知识,设计了从简单易得的底物出发实现吴茱萸碱一锅法合成的综合化学实验。实验过程包括背景文献调研与分析总结、吴茱萸碱一锅法合成、化合物波谱性质表征以及反应机理研究。该综合实验不仅可以培养学生的文献检索、合成操作以及谱图分析等方面的综合能力,而且可以提高学生对有机合成方法学及反应机理研究的理解,提升学生对科学研究逻辑的认知,为将来从事相关科研或实践工作打下基础。     

气相色谱法分离正己烷和环己烷的实验设计与教学探索

The experiment of separating low toxic n-hexane and cyclohexane by traditional gas chromatography was improved with orthogonal experimental design. The effect of sample quantity, vaporization chamber temperature, detector temperature, column temperature, line velocity and separability of the split ratio were examined. Through the experiment, students could understand the use and maintenance of gas chromatography instruments. At the same time, they could understand separability and column efficiency of chromatography.     

计算模拟在化学热力学、动力学教学实践中的应用——以甲醛解离反应为例

Chemical thermodynamics and kinetics are the important contents in the course of inorganic chemistry and physical chemistry, but this part of knowledge is difficult to understand. We tried to integrate the computational simulation with the knowledge of chemical thermodynamics and dynamics in order to help students understand the knowledge. In the class, we demonstrated students with the chemical thermodynamics and kinetics process of formaldehyde dissociation reaction, so as to make the abstract knowledge intuitive and visual. According to the students' feedback, we found that the enthusiasm and participation of the students in the subsequent class have been greatly improved.     

Matlab在两性物质pH计算中的应用

两性物质的p H计算是无机化学中非常重要的内容。通过3个有代表性的例子(Na HCO3、NH4CN、Na H2PO4),运用Matlab获得它们的p H、各物种的分布分数。可以帮助学生理解两性物质酸碱性原因,并让学生了解、学习Matlab在化学中的应用。     

Qualitative Analysis of Herbs by Gas Chromatography/Mass Spectrometry (GC/MS). An Undergraduate Instrumental Analysis Laboratory Exercise

A laboratory exercise to be used in an undergraduate instrumental methods course is presented for the qualitative analysis of interesting real-world herbal extracts. The objective of this experiment is to familiarize students with a modern experimental method gas chromatography/mass spectrometry (GC/MS).     

关于活性聚合判据的讨论

活性聚合尤其是活性聚合的判据是高分子化学课程中重要的教学内容。本文对活性聚合的判据进行了全面的总结,并深入分析了每种判据的来源,这些教学内容可作为现有教材的补充,有助于学生深刻理解活性聚合的内涵和外延。     

UOOC平台与腾讯课堂相结合的“在线异步教学”

The COVID-19 broke out on a large scale, and online teaching became the first choice for teachers. Avoiding network congestion and ensuring learning effects are the dilemmas faced by online teaching. With the help of the UOOC platform and the Tencent Classroom, taking the "Polymer Structure and Performance" course as a sample, we suggested a new "online asynchronous teaching" model. Among them, the SPOC course is convenient for students to manage their learning time; "Chapter Quiz" and "Student-to-Student Mutual Evaluation" are helpful for students to obtain multi-angle feedback; project tasks are focused on case analysis so that students carry out inquiry-based learning. Overall, the "online asynchronous teaching" model breaks the time and space restrictions on teaching and learning, guarantees the quality of teaching during the epidemic, and lays the foundation for creating a "golden class".     

简谈普适气体常量R——贯穿普化教育的重要常量

The universal gas constant R is an important constant in physics, and one of the vital fundamental constant throughout the teaching of general chemistry. This article aims to present a general review about the universal gas constant to the science and engineering majored students, including its history, determination, physical meaning and applications in chemical education. The choice of R values under various conditions is also provided to help students better understand and master basic concepts.     

中职本科贯通应用型人才培养的无机化学教学探索

中职本科贯通生的中职阶段学习与普通高中学习存在着较大的区别,由于对基础知识未进行过系统强化训练,中职学生的理论知识较为薄弱;但由于较早进相关工厂见习或顶岗操作,其形象思维能力较强。在无机化学教学中,根据中职本科贯通生的特点,多采取探究式教学,让学生根据工厂生产中遇到的情况用自己的语言来描述一些概念和定义,"发现"一些原理,有利于培养应用型人才。     

在化学类通识教育课程中开展“课堂辩论”对大学生能力培养的探索与实践

This paper explored "the classroom debates" in "nutrition chemistry" course. After evaluating the students' expectation in participating activities, the participating degree and their gains from the activity, it was found that the performance and gains from the "classroom debate" were influenced by provincial locations, genders and majors. The results showed that "the classroom debates" need to coordinate the students' speculative thinking ability, creative thinking, team playing, medical ethics and professional education as a whole. This would help the students to form a way of critical thinking as well as the right outlook on life and value system.