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

本系正在开发现代电感耦合等离子体原子发射光谱（ICP-AES）的几个新实验，目的是激发和激发参加两门分析服务课程的本科生的好奇心，非专业的定量和仪器分析和化学专业的综合实验室项目。学生将学习如何通过微波消解制备真实样品，以及对所有重要金属进行定量多元素分析的能力。自1975年第一台商用ICP问世以来，光谱仪经历了重新设计和发展，因为使用复合材料代替钢使光谱仪更轻，微电脑控制仪器和显示多元素分析结果，并使用固态射频发生器产生可达到6000至9000度的氩原子等离子体。足以使几乎任何元素原子化并激发大量放射的温度。有几种新一代光谱仪适合在本科教学实验室使用。由于可以对10到20种元素进行快速顺序检测，因此该技术非常适合分析真实但复杂的环境样品（如岩石和土壤、食品和生物制品、水和空气）中发现的主要、次要和痕量成分。

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.