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以UV-Vis分光光度法实验为研究实例,采用数据处理软件Multicom(采用Delphi7．0编写,可在Windows系统下运行)建立了以因子分析法及交叉验证法为主的评价方法,通过对剩余标准偏差(RSD)和相对标准误差(RSE)的计算,分别评价了学生的仪器分析操作水平和容量分析操作水平。通过对现代分光光度计和传统分光光度计的仪器噪声水平、实验误差来源的比较以及吸光度测量的线性范围的比较,加深学生对于仪器及实验原理的理解。通过该实验课程可以看出,将化学计量学方法有效的引入现代仪器分析技术中,不但有效的提高了学生在现代仪器分析中综合运用线性代数和计算机知识等方面的能力,而且增加了教师对学生实验技能客观评价的准确性。
Taking UV-Vis spectrophotometry experiment as an example, using the data processing software Multicom (written in Delphi7.0 and running under Windows system), the evaluation method based on factor analysis and cross-validation is established. Standard deviation (RSD) and relative standard error (RSE) were calculated and the student’s instrumental analysis level and capacity analysis level were evaluated respectively. By comparing the instrument noise levels of modern spectrophotometers and conventional spectrophotometers, the sources of experimental errors, and the linear range of absorbance measurements, students’ understanding of instrumentation and experimental principles is enhanced. Through this experiment course, we can see that the effective introduction of chemometrics method into modern instrumental analysis technology not only effectively enhances the ability of students to comprehensively use linear algebra and computer knowledge in modern instrumental analysis, but also increases teachers’ Objective evaluation of students’ experimental skills.