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

该部门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，旨在激发和激发本科生的好奇心，参加两个分析服务课程，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。学生们正在学习如何通过微波消解制备真实的样品，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，由于使用复合材料代替钢材使光谱仪更轻，使用微型计算机控制仪器并显示多元素分析结果，以及使用固态射频发生器产生可达6,000至9,000度的氩原子等离子体，一个足以使几乎任何元素发光并激发出大量辐射的温度。 有几种新一代的光谱仪适合在本科教学实验室使用。由于10至20种元素的快速连续检测是可能的，该技术非常适合于分析在真实的但复杂的环境样品中发现的主要，次要和痕量成分，如岩石和土壤，食品和生物水，和空气。

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.