区分化学分析法与仪器分析法适用性的实践教学探索

Comparison Between Applicability of Chemical Analysis and Instrumental Analysis

根据方法原理，分析化学的常用分析方法可分为化学分析法和仪器分析法。高灵敏度、高选择性、高自动化、数字化和智能化已成为分析化学的发展方向，仪器分析法成为了分析化学发展的主流和热点。因此，在校本科生往往忽视化学分析法的重要作用以及适用范围，陷入仪器分析法为万能分析方法的误区。本文选用络合滴定法和原子吸收光谱法分别对常量含铅样品进行测试，通过考察测试结果的相对误差大小，探索了化学分析法和仪器分析法的适用范围，从而纠正了在校本科生的唯仪器分析法的错误观念。

According to the principle, analytical chemistry can be divided into chemical anal- ysis and instrumental analysis. High sensitivity, high selectivity, high automation, digitization and intelligentization have been the development direction of analytical chemistry. Instrumental method has become the mainstream of analytical chemistry. Therefore, undergraduate students always ignore the important role of chemical analysis and its scope of application, and make the mistake that the instrumental method is universal. We chose complexometric titration method and atomic absorption spectrometry to detect lead content of test solution respectively. On the basis of the relative error of the results, we explored the scope of chemical analysis and instrumental method. It corrected the wrong ideas of the undergraduates that instrumental method is universal and it can replace the chemical analysis all the time.