Abstract:

Currently, university-level analytical chemistry experiments are relatively simple, which impacts the students' ability to learn quality assurance and quality control techniques for the entire analysis process, and reduces the cultivation of exploration skills and quality of comprehension. Therefore, we designed a comprehensive analytical chemistry experiment which involves sample preparation, method validation, sample pre-treatment, quantitative analysis, and data processing, as well as methods for quality assurance and quality control during the execution of experiments. In this experiment, students were instructed to accurately determine the cadmium content in a rice sample using graphite furnace atomic absorption spectrometry. This experiment is based on an external standard quantitative method, and various quality assurance and quality control methods were used in the analysis process. This comprehensive experiment involves the entire analysis process, which not only helps our students to apply theory to practice, but also helps develop students' problem solving abilities and their thinking abilities. This experiment is easy and safe to operate and can be completed within 8 h. Furthermore, analytical chemistry teaching and research groups in universities may use this as a project for sophomore or junior students.

Key words: Analytical chemistry experiment, Whole process of analysis, Quality assurance, Cadmium, Quantitative analysis