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关键词： 坚果油   碘量法   碘值   分析化学实验  

摘要： 介绍一个综合性的定量分析化学实验。实验以核桃和花生等坚果为研究对象,采用有机溶剂萃取坚果中的油脂,并利用间接碘量法测定油脂的"碘值",以衡量不同坚果油的不饱和度高低。学生通过该实验不仅能掌握液相萃取、减压过滤、旋转蒸发等样品前处理方法,更好地理解和掌握间接碘量法的工作原理、实验操作和数据处理方法,源于生活的实验素材还能进一步激发学生的学习兴趣。建议将本实验纳入本科定量分析化学综合实验课。

关键词： 无机及分析化学   “科学—技术—社会—环境”教育   人才培养  

摘要： 针对大学一年级生物专业学生的化学基础存在差异的现状,在《无机及分析化学》教学过程中渗透"科学—技术—社会—环境"(STSE)教育理念,可以切实解决学生在学习过程中的困难,提高学生解决实际问题的能力,也可以提升学生的科研创新能力和人文修养。此理念的实施可以提升教学效果和效率,促进教师不断地更新自身的知识结构、提高教学技能和科研能力。

关键词： 无机及分析化学   课程思政   高等院校   思政元素  

摘要： 无机及分析化学课程中开展思政教育应着重课程思政元素的挖掘以及思政元素与专业知识的融合。本文从科学家故事引申出科研精神和家国情怀,化学定律和原理中蕴含的思政元素和人生哲理,专业知识升华为伦理道德和职业素养三个方面对无机及分析化学课程中的思政元素进行挖掘和实践,力求将无机及分析化学课程与思政教育无缝融合,实现全员、全程和全方位育人的教学目标。

关键词： 3D printing   Microfluidic devices   Separation science   Extraction   Chromatography  

摘要： 3D printing has attracted the attention of analytical chemists. 3D printing possesses the merits of fast and low-cost fabrication of geometrically complex 3D structures and has been employed in the fields of microfluidic devices, electrochemical sensors and biosensors, separation sciences, sample pretreatment, and wearable sensors. We focus on the applications and materials of 3D printing in microfluidic devices, separation sciences, and extraction over the last three years and we offer outlook. It is clear that the 3D printing in separation science is here to stay and with new materials development, to develop to on demand fabrication of separation tools. (C) 2020 Elsevier B.V. All rights reserved.

关键词： Teaching and learning methods   Students   Analytical chemistry  

关键词： Layered materials   MXenes   Adsorbents   Electrochemical sensing   Optical sensing   MAX phases  

摘要： MXenes are an emerging class of 2D materials that exhibit unique properties of high conductivity and hydrophilicity. They can be easily functionalized with other materials due to the abundance of surface terminated functionalities. The versatile chemistry of MXenes allows fine-tuning their properties for different analytical chemistry applications such as electrochemical and optical sensing. MXenes may also be useful adsorbents for analytical extractions due to their exceptional surface chemistry, high surface areas, and ease of functionalization as per the nature of the target compounds. The features of the MXenes that can make them excellent materials for analytical applications are listed and critically appraised. The emerging applications of MXenes in electrochemical and optical sensing are discussed with the pertinent examples. The potential of MXene-based sorbents for analytical extractions is highlighted based on the current literature that describes their applications in adsorptive removal and environmental remediation. In the end, limitations, challenges, and future opportunities are briefly presented. (C) 2020 Elsevier B.V. All rights reserved.

关键词： Elementary/Middle School Science   High School/Introductory Chemistry   Safety/Hazards   Chemical Education Research   Laboratory Instruction   Textbooks/Reference Books   Laboratory Management   Standards National/State  

摘要： The topic of chemistry safety was included at the margins of traditional chemistry education in China. In order to understand the concerns of the safety issues based on the new chemistry curriculum in the mainland China secondary school, this study analyzed old and new secondary chemistry curriculum standards via the Natural Language Processing & Information Platform (NLPIR). Results show that the frequency of chemistry-safety-related words increased in the new curriculum standards. Evidence that the safety content is enriched and enhanced can also be found in the new textbook. In addition, content analysis of lesson plans from Jiangsu teaching contests reveals that the chemistry teachers (CTs) pay more attention to the safety risk of experiments, but they generally ignore the consideration of risks from the perspective of the uncertainty of chemical reactions.

关键词： 职业规划   教学内容   考核方法  

摘要： 分析化学实验作为一门旨在提高学生的实验能力和将理论知识联系实际实验的能力的学科。如何通过该课程提高学生们各方面的能力,让学生学到的知识可以用于现在的发展和满足社会对人才的要求,是老师教学该课程时不可忽视的重要条件。本文主要从如何提高学生的职业规划意识、教学内容与实际生活相联系和考核方式多样化等方面对分析化学实验这门课程的教学进行了简单分析。

关键词： 无机及分析化学实验   绿色化学   教学改革  

摘要： 《无机及分析化学实验》存在所需试剂量大、不够节约,产生的废液种类多、不够绿色,废液成分复杂、不够安全等问题。围绕解决这些问题,要对实验进行绿色化改革,具体就是实施微量化-半微量实验,串联实验,实验废液及时回收。通过改革创新、综合施策,旨在减少实验对环境的污染,探索一条绿色化实验的新路子。