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关键词： Multi-way calibration   Environment   Pollutants   Second-order advantage   Quantitative analysis  

摘要： There has been an increasing concern on environmental issues in the worldwide over the last decade. Environmental pollution has diverse and substantial damages to public health. Multiway calibration has become a powerful tool in complex environmental matrices due to the distinctive "second-order advantage". This review presents the recent progress of multiway calibration methods in environmental analytical chemistry. Various data types, available calibration models and corresponding algorithms, some fundamental issues and the recent application of multiway calibration methods in quantitative analysis of environmental samples were introduced in detail.

关键词： 化学  

ISBN: (纸本)9787030670328

摘要： 本书是“十二五”普通高等教育本科国家级规划教材《机及分析化学》（第四版）的配套实验教材，是为满足现代信息化技术背景下的教学需求而编写的新形态教材。本书主要内容包括实验基础知识、基础实验、拓展实验和设计性实验。为便于教学，书中的实验操作及仪器使用视频、拓展阅读、科学家小传等内容可以通过扫描相关二维码查看。本书还配套电子教案、思考题解析及相关测试等资料，使用本书作为教材的老师可联系出版社索取。

关键词： Oil fingerprinting   Reservoir quality   GC-MS   CHEM-SIC   PCA  

摘要： The ability to understand and possibly even predict the productivity of wells across a field is an important accomplishment in a production setting. In the tight Lower Cretaceous chalk field Valdemar, 5 wells have been observed to produce significantly larger oil volumes compared to nearby wells. This study was conducted to map the inter-well differences in the oil composition to better understand the productivity differences. This was done by analyzing any chemical differences of 21 samples from 16 different wells by GC-MS and principal component analysis of summed extracted ion chromatograms (SICs) using the chemometric analysis of selected ion chromatograms (CHEMSIC) method. The sterane (m/z 217 and m/z 218) and C4 (m/z 234) biomarker SICs were found to have chemically meaningful features described by principal component 1 (PC1). The association between these markers and the relative production was modeled to provide a better understanding of the productivity of the different wells. A correlation between oil saturation and productivity was established in the sense that the more mature and thus less viscous oil seem to have charged certain favorably placed reservoir sections first;these locations coincide with the location of the 5 wells in question.

关键词： Chemical analysis  

摘要： It is universally accepted that a measurement of a quantity of interest should be presented as the product of a numerical value and a unit (we should also include an estimate of measurement uncertainty, but this is beyond the scope of this Technical Brief). The International System of Units (the SI) provides the world's only practical system of coherent units of measurement for this purpose. For ease of expression and understanding it is generally preferred that the numerical value presented is between 1 and 100. One might refer to these as 'human-scale' numbers that are easy to relate to, conceptualise and communicate. The SI uses 'SI prefixes' to achieve this aim, allowing us to write 2.3 km rather than 2300 m. Equally we could use scientific nomenclature to write, arguably more inelegantly, 2.3 x 10(3) m. Deviation from these agreed practices may risk confusion in the communication of measurement results. This Technical Brief outlines the SI units and quantities available for use in analytical chemistry and explains the care that must be taken if alternative approaches are followed. One principle remains essential to aid understanding: the description of the quantity being expressed should always be stated unambiguously in words as part of the presentation of a measurement result.

关键词： 微视频   翻转课堂   实验教学  

摘要： 在实际教学中,由于实验课时长、学生人数及教师人数受限,同时学生操作技能也是参差不齐,这样就难以提高学生的实验操作能力,严重影响了教学效果。将微视频的翻转课堂应用于实验教学中,提高学生独立自主学习能力,提高基本操作能力。

关键词： 就业导向   分析化学实验   教学改革  

摘要： 在分析实验课中,教师通过具体制定能力培养目标和增加设计性实验的方法,能很好地培养学生较强的动手能力和独立工作能力,全面提高实验能力,分析化学实验教学的改革,需要不断地探索与尝试,总结和完善,需要更多教师的积极。力争运用适当的教学方法和手段,丰富教学内容,拓展教学环境,弥补传统实验教学的不足和适应时代科技发展的需要,进而对学生的能力和素质培养起到较好的教学效果。

关键词： 分析化学实验   SPOC   线上教学  

摘要： 在抗击新冠肺炎疫情期间,按照教育部“停课不停学”的要求,主要通过以下途径开展分析化学实验课程线上教学:1.依托分析化学实验SPOC课程,让学生在线学习实验项目视频、在讨论区答疑、完成在线测验;2.依托腾讯会议平台和学生开展一对一的课堂讨论,了解学生的学习情况,学生间交流学习体会;3.给学生发送电子版教材;4.向学生开放虚拟仿真实验平台。在实践中,线上教学取得了良好的教学效果,得到学生的好评。化学类实验课程与演示类实验不同,线上学习不能代替学生在实验室自主操作,但在非常时期,线上教学解决了学生“看不见,无法学”的问题,同时也为学生返校后进入实验室开展动手操作做好知识储备。

关键词： 无机及分析化学实验   优化教学   实践与创新  

摘要： 《无机及分析化学实验》是普通高校本科生重要的基础课程,笔者结合多年来的教学经验,从教学内容、教学模式及考核方式等方面对该课程进行了创新性的优化与改进,提升了学生动手操作、独立思考以及创新实践能力,培养了学生良好的专业素养和认真严谨的科学作风,对于培养全面发展的应用型人才奠定了良好的基础。

关键词： 课程思政   分析化学   思政元素  

摘要： 分析化学是化学化工及其相关专业的重要基础课,理论与实验并重,课程思政建设水到渠成。本文介绍了我校分析化学课程思政建设的思路,基于学科特点与专业知识中所蕴含的思政元素,找到思政教学的切入点,给出了分析化学课程思政的具体实践方式。教学实践中遵循理论与实验同向同行的原则,将思想引领融入到分析化学专业知识传授中。