Juicing the Juice: A Laboratory-Based Case Study for an Instrumental Analytical Chemistry Course

Autor:	Frank J. Dinan, Harvey A. Pines, Renee Larson, Michael St. Phillips, Peter M. Schaber, Judith E. Larkin
Rok vydání:	2010
Předmět:	Orange juice Food and drug administration Independent study Assessment data Based case study Chemistry Research methodology education Analytical chemistry General Chemistry Chemist Education
Zdroj:	Journal of Chemical Education. 88:496-498
ISSN:	1938-1328 0021-9584
DOI:	10.1021/ed100863d
Popis:	A young, inexperienced Food and Drug Administration (FDA) chemist is asked to distinguish between authentic fresh orange juice and suspected reconstituted orange juice falsely labeled as fresh. In an advanced instrumental analytical chemistry application of this case, inductively coupled plasma (ICP) spectroscopy is used to distinguish between the fresh and reconstituted samples based on their calcium and magnesium concentrations. Students working in teams are given the challenge posed in the case to the FDA chemist. They are charged with designing an experimental procedure, obtaining and analyzing the needed data, and writing a formal report. This case study requires students to conduct themselves in the same manner chemists would in the “real world” when faced with a new and challenging problem. Experimental procedures developed by student teams lead to the correct identification of unknowns a majority of the time. Assessment data indicate this case study elicited positive interest and interactions.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7275a73a812430fbe7ec6fa273204a54 https://doi.org/10.1021/ed100863d Zobrazit plný text záznamu