ERIC Number: EJ1443240
Record Type: Journal
Publication Date: 2023-Feb
Pages: 5
Abstractor: As Provided
ISBN: N/A
ISSN: ISSN-0021-9584
EISSN: EISSN-1938-1328
Available Date: N/A
Multiple Solid-Liquid Extraction: Determination of Extraction Yield through UV-Vis Spectroscopy
Elia Bergamin; Giacomo Fabris; Matteo Neffat; Paola Baron Toaldo; Daniela De Luchi; Renato Bonomi
Journal of Chemical Education, v100 n2 p875-879 2023
A class of 18 students attending the last year of an Italian high school was divided into groups and performed the extraction of pigments contained in hibiscus tea. Each group worked at a different temperature and carried out multiple extractions using distilled water as a solvent. By means of UV-vis spectroscopy it was possible to determine the yield of each individual extraction and then to study the effect of temperature on the extraction itself. The method is easy to implement, it does not require the use of hazardous reagents or special safety precautions, and it is very cheap. The laboratory part was carried out in 3 h time, while the analysis and data processing took about 4 h. On an educational level, the students learned to process and analyze large amounts of data, and they became familiar with the UV-vis spectrophotometer and eventually had to solve the problems independently.
Descriptors: Chemistry, Spectroscopy, Scientific Concepts, Secondary School Science, High School Students, Foreign Countries, Science Laboratories, Laboratory Experiments, Science Process Skills, Data Analysis, Problem Solving, Hands on Science
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: eic@jce.acs.org; Web site: http://pubs.acs.org/jchemeduc
Publication Type: Journal Articles; Reports - Descriptive
Education Level: Secondary Education; High Schools
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers - Location: Italy
Grant or Contract Numbers: N/A
Author Affiliations: N/A