期刊
JOURNAL OF CHEMICAL EDUCATION
卷 97, 期 3, 页码 786-792出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jchemed.9b00433
关键词
Second-Year Undergraduate; Analytical Chemistry; Laboratory Instruction; Collaborative/Cooperative Learning; Inquiry-Based/Discovery Learning; Problem Solving/Decision Making; Applications of Chemistry; Qualitative Analysis; Quantitative Analysis
A two to three period analytical chemistry experiment has been developed which allows second year students to explore chemical color tests used to detect adulterated pharmaceuticals. Students prepare several paper analytical devices (PADs) to generate positive and negative controls antibiotics, along with cutting agents such as starch and chalk. These PADs are used to identify the active ingredients and excipients in mystery tablets prepared by their classmates. In the second part of the lab, the students select an individual color test and design an experiment to quantify their mystery pill's active pharmaceutical ingredient (API). Nearly all of the student groups were able to successfully identify adulterants present in their mystery tablets. The quantification of the mystery tablets was also successful with all but one group calculating the correct concentration within 6%. In a postlab assessment, the students identified their largest gains in their ability to analyze data and other information, skill in science writing, and learning of laboratory techniques.
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