引用本文:
梁莹然, 王斐, 孙佳宝, 郑洪涛, 朱振利. 基于液体阴极放电源的等离子体原子发射光谱法测定碱金属元素新型实验装置的搭建及应用——一种实现对发射光谱基础教学实验的替代探索[J]. 大学化学,
2024, 39(5): 380-387.
doi:
10.3866/PKU.DXHX202312024
Citation: Yingran Liang, Fei Wang, Jiabao Sun, Hongtao Zheng, Zhenli Zhu. Construction and Application of a New Experimental Device for Determination of Alkaline Metal Elements by Plasma Atomic Emission Spectrometry Based on Solution Cathode Glow Discharge: An Alternative Approach for Fundamental Teaching Experiments in Emission Spectroscopy[J]. University Chemistry, 2024, 39(5): 380-387. doi: 10.3866/PKU.DXHX202312024
Citation: Yingran Liang, Fei Wang, Jiabao Sun, Hongtao Zheng, Zhenli Zhu. Construction and Application of a New Experimental Device for Determination of Alkaline Metal Elements by Plasma Atomic Emission Spectrometry Based on Solution Cathode Glow Discharge: An Alternative Approach for Fundamental Teaching Experiments in Emission Spectroscopy[J]. University Chemistry, 2024, 39(5): 380-387. doi: 10.3866/PKU.DXHX202312024
基于液体阴极放电源的等离子体原子发射光谱法测定碱金属元素新型实验装置的搭建及应用——一种实现对发射光谱基础教学实验的替代探索
摘要:
当前，高等学校化学类专业本科教育阶段关于“仪器分析实验”教学中涉及的元素分析检测内容主要通过商品化大型仪器进行，包括原子发射、吸收、荧光等，它们能有效满足《高等学校化学类专业指导性专业规范》中关于分析仪器部分基础原理的教学需求。然而，这些仪器均存在价格高昂、结构封闭等问题。基于以上不足，我们结合液体阴极放电(SCGD)技术，设计了便携式微等离子体-原子发射光谱装置的搭建与应用实验。该装置实现了原子发射光谱仪器的小型化，并便于直观演示。在该实验中，学生可以自主搭建装置并自行采集信号，从而提高他们的动手能力以及对仪器构造和原子发射光谱原理的理解。该实验不仅可以实现多种元素的快速、灵敏分析和检测，而且极大地降低了实验成本，培养学生的学习兴趣和创新意识，达到良好的教学效果。此外，该实验方案极富趣味性，有利于培养学生的创新思维和科研能力。与传统分析仪器相比，改进后的仪器装置价格低廉，易于实验教学推广，从而增强学生的实验参与感，提高教学效果。
English
Construction and Application of a New Experimental Device for Determination of Alkaline Metal Elements by Plasma Atomic Emission Spectrometry Based on Solution Cathode Glow Discharge: An Alternative Approach for Fundamental Teaching Experiments in Emission Spectroscopy
Abstract:
In current undergraduate education for chemistry majors, the teaching experiments related to elemental analysis in the “Instrumental Analysis” course mainly rely on the use of commercial instruments such as Atomic Absorption Spectroscopy (AAS), Atomic Fluorescence Spectrometry (AFS), and Inductively Coupled Plasma Mass Spectrometry (ICP-OES). While these instruments effectively cover the teaching requirements for understanding the basic principles of analytical instruments, they are often expensive and have closed structures. To address these limitations, we designed a portable microplasma-atomic emission spectroscopy device based on Solution Cathode Glow Discharge (SCGD) technology, a cutting-edge development in the field. By constructing and utilizing this device, students can independently collect emission signals, thereby enhancing their practical skills and deepening their understanding of instrument structure and the principles of atomic emission spectroscopy. Furthermore, this experimental approach is not only interesting but also fosters students’ innovative thinking and scientific research abilities. Compared to traditional analytical instruments, the improved device is cost-effective and easily adaptable for laboratory teaching, thereby increasing students’ engagement and improving overall teaching effectiveness.
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Key words:
- Microplasma
- / Atomic emission spectroscopy
- / Miniaturization of instruments
- / Self built
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