At-Home Real-Life Sample Preparation and Colorimetric-Based Analysis: A Practical Experience outside the Laboratory
As teaching laboratories stand empty in light of COVID-19, we extended the practical experience from the laboratory to the safety of the students’ homes. We developed a simple, robust, and versatile at-home experiment that teaches solution preparation, calibration curves, real-life sample preparatio...
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| Veröffentlicht in: | Journal of chemical education 2021-03, Vol.98 (3), p.1031-1036 |
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| container_end_page | 1036 |
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| container_title | Journal of chemical education |
| container_volume | 98 |
| creator | Doughan, Samer Shahmuradyan, Anna |
| description | As teaching laboratories stand empty in light of COVID-19, we extended the practical experience from the laboratory to the safety of the students’ homes. We developed a simple, robust, and versatile at-home experiment that teaches solution preparation, calibration curves, real-life sample preparation, and data analysis to second-year analytical chemistry students. Solutions were prepared using common kitchen tools and readily available corn starch, syringes, and trophic iodine for a low cost below $20. A calibration curve for the brightness of corn starch–iodine solutions as a function of starch concentration was prepared. Solutions were imaged using a smartphone camera, and the brightness of each solution was quantified using ImageJ. Starch was extracted from a ripe banana and quantified using the calibration curve. Extending the practical experience to students’ homes in the age of COVID-19 not only provides them with a better sense of the real chemistry laboratory they will one day return to but also helps solidify and expand on key concepts learned in the virtual classroom. |
| doi_str_mv | 10.1021/acs.jchemed.0c01299 |
| format | Article |
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| fulltext | fulltext |
| identifier | ISSN: 0021-9584 |
| ispartof | Journal of chemical education, 2021-03, Vol.98 (3), p.1031-1036 |
| issn | 0021-9584 1938-1328 |
| language | eng |
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| source | ACS Publications |
| subjects | Analytical chemistry Brightness Calibration Chemistry College Science Colorimetry Corn COVID-19 Data analysis Distance Education Iodine Laboratory Experiments Organic Chemistry Pandemics Sample preparation School Closing Science Experiments Science Instruction Science Laboratories Starch Students Studies Syringes Undergraduate Study |
| title | At-Home Real-Life Sample Preparation and Colorimetric-Based Analysis: A Practical Experience outside the Laboratory |
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