{"title":"Student-Developed Analytical Approach for Element Determination in Dietary Supplements","authors":"Gunnar Schwarz*, and , Chiara Fabbretti, ","doi":"10.1021/acs.jchemed.5c00584","DOIUrl":null,"url":null,"abstract":"<p >We present a new laboratory experiment in which students use a nitrogen microwave inductively coupled atmospheric-pressure plasma optical emission spectrometer (MICAP-OES) to determine several elements in dietary supplements. Unlike most other quantitative analytical lab experiments, this experiment required students to develop and carry out their own approaches to a given analytical task based on a previous lecture course on quantitative element analysis. Experimental details were not provided to the students. Appropriate procedures included dissolving the samples, as well as acid digestions. Students were able to contrive and perform the analysis within the given time frame of 4 h. We also show various ways in which the experiment can be adapted to provide different content emphases on sample preparation, calibration, use of internal standards, and spectral interference. An evaluation indicated that this experiment was well received by students but students also asked for a more detailed handout.</p>","PeriodicalId":43,"journal":{"name":"Journal of Chemical Education","volume":"102 9","pages":"4080–4086"},"PeriodicalIF":2.9000,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acs.jchemed.5c00584","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Chemical Education","FirstCategoryId":"92","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acs.jchemed.5c00584","RegionNum":3,"RegionCategory":"教育学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
We present a new laboratory experiment in which students use a nitrogen microwave inductively coupled atmospheric-pressure plasma optical emission spectrometer (MICAP-OES) to determine several elements in dietary supplements. Unlike most other quantitative analytical lab experiments, this experiment required students to develop and carry out their own approaches to a given analytical task based on a previous lecture course on quantitative element analysis. Experimental details were not provided to the students. Appropriate procedures included dissolving the samples, as well as acid digestions. Students were able to contrive and perform the analysis within the given time frame of 4 h. We also show various ways in which the experiment can be adapted to provide different content emphases on sample preparation, calibration, use of internal standards, and spectral interference. An evaluation indicated that this experiment was well received by students but students also asked for a more detailed handout.
期刊介绍：
The Journal of Chemical Education is the official journal of the Division of Chemical Education of the American Chemical Society, co-published with the American Chemical Society Publications Division. Launched in 1924, the Journal of Chemical Education is the world’s premier chemical education journal. The Journal publishes peer-reviewed articles and related information as a resource to those in the field of chemical education and to those institutions that serve them. JCE typically addresses chemical content, activities, laboratory experiments, instructional methods, and pedagogies. The Journal serves as a means of communication among people across the world who are interested in the teaching and learning of chemistry. This includes instructors of chemistry from middle school through graduate school, professional staff who support these teaching activities, as well as some scientists in commerce, industry, and government.
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