Development of Hands-on Student Experiments to Use ICP-AES in the Analysis of Real Samples

开发使用 ICP-AES 分析实际样品的学生实践实验

• 批准号: 9651245
• 负责人: James Ingle
• 金额: $ 4.49万
• 依托单位: Oregon State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-06-01 至 1998-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9651245&HistoricalAwards=false
• 关键词: Development; Hands; Student; Experiments; Use

This department is developing several new experiments in modern inductively coupled plasma atomic emission spectroscopy (ICP-AES) with an aim to motivating and inspiring curiosity in undergraduate students enrolled in two analytical service courses, quantitative and instrumental analysis for nonmajors and in the Integrated Laboratory program for chemistry majors. Students are learing first-hand how to prepare real samples by microwave digestion and the power of quantitative multi-elemental analysis for all important metals. Since the advent of the first commercial ICP in 1975, the spectrometer has experienced a redesign and growth due to the use of composite materials instead of steel to make the spectrometer lighter, microcomputers to control the instrument and display results for multi-element analysis, and the use of a solid-state radio frequency generator to produce an Argon atom plasma that can reach 6,000 to 9,000 degrees, a temperature sufficient to atomize and excite significant emission from almost any element. There are several new generation spectrometers that are appropriate for use in the undergraduate teaching laboratory. Since fast sequential detection of 10 to 20 elements is possible, the technique is very well suited to the analysis of major, minor, and trace constituents found in real but complex environmental samples such as rocks and soil, foods and biologicals water, and air.

该系正在开发几个现代电感耦合等离子体原子发射光谱分析(ICP-AES)的新实验，旨在激发和激发两门分析服务课程的本科生的好奇心，这两门课程是非专业的定量和仪器分析，以及化学专业的综合实验室计划。学生们正在第一手学习如何通过微波消解制备实际样品，以及对所有重要金属进行定量多元素分析的能力。自从1975年第一台商用电感耦合等离子体出现以来，光谱仪经历了重新设计和发展，原因是使用复合材料而不是钢来使光谱仪更轻，微型计算机来控制仪器并显示多元素分析的结果，以及使用固态射频发生器来产生可达到6000至9000度的Ar原子等离子体，该温度足以雾化并激发几乎任何元素的显著发射。有几种新一代光谱仪适合在本科教学实验室使用。由于可以快速连续检测10到20种元素，该技术非常适合于在真实但复杂的环境样品中发现的主要、次要和痕量成分的分析，如岩石和土壤、食品和生物制品、水和空气。