ERIC Number: EJ1108460
Record Type: Journal
Publication Date: 2016-Jul
Abstractor: As Provided
Optimization and Design of an Absorbance Spectrometer Controlled Using a Raspberry Pi to Improve Analytical Skills
Bougot-Robin, Kristelle; Paget, Jack; Atkins, Stephen C.; Edel, Joshua B.
Journal of Chemical Education, v93 n7 p1232-1240 Jul 2016
It is not uncommon for students to view laboratory instruments as black boxes. Unfortunately, this can often result in poor experimental results and interpretation. To tackle this issue, a laboratory course was designed to enable students not only to critically think about operating principles of the instrument but also to improve interpretation skills. Students were required to build their own visible spectrometer using interlocking building bricks with simple optical elements and a Raspberry Pi computer. Experiments were then conducted to explore the instrumental capabilities while, at the same time, using Python programming to plot data, perform linear least-squares fitting, and calculate errors. Instrument response and spectral measurements were followed by kinetic studies, enabling the students to tackle a "real" problem by extracting rate constants. The main learning outcomes were that the students would gain a better understanding of instrumental components and at the same time learn valuable analytical techniques such as calibration, determination of the limits of linearity, and dynamic range. These outcomes were achieved by applying a problem based learning approach.
Descriptors: Chemistry, Science Instruction, Laboratory Equipment, Critical Thinking, Interpretive Skills, Computer Uses in Education, Programming, Least Squares Statistics, Computation, Outcomes of Education, Problem Based Learning, Undergraduate Students, College Science, Foreign Countries
Division of Chemical Education, Inc and ACS Publications Division of the American Chemical Society. 1155 Sixteenth Street NW, Washington, DC 20036. Tel: 800-227-5558; Tel: 202-872-4600; e-mail: firstname.lastname@example.org; Web site: http://pubs.acs.org/jchemeduc
Publication Type: Journal Articles; Reports - Research
Education Level: Higher Education; Postsecondary Education
Authoring Institution: N/A
Identifiers - Location: United Kingdom (London)
Grant or Contract Numbers: N/A