An Automatic Grading System For a Laboratory Experiment Class: Kinetic Determination of Furfural as a Parameter of Food Quality

TCE

The Chemical Educator

ISSN: 1430-4171 (electronic version)

Table of Contents

Abstract Volume 19 (2014) pp 148-152

An Automatic Grading System For a Laboratory Experiment Class: Kinetic Determination of Furfural as a Parameter of Food Quality

María Isabel Rodríguez-Cáceres^†,Nielene Mora-Diez^†,María P. Godoy-Caballero^†, David Muñoz de la Peña^‡, David González Gómez^§ and Arsenio Muñoz de la Peña*^,^†

†Department of Analytical Chemistry, University of Extremadura, Avenida de Elvas, s/n, 06006, Badajoz, Spain; ‡Department of Automation and Systems Engineering, University of Seville, Camino de los Descubrimientos, s/n, 41092, Seville, Spain; §Department of Science and Mathematics Education, Training Teaching School, University of Extremadura, Avda. de la Universidad s/n, Cáceres, Spain, arsenio@unex.es
Received February 26, 2014. Accepted April 24, 2014.

Published: 30 May 2014

Abstract. In this work, we present the application of the automatic grading system, Goodle GMS (Grading Management System), to an analytical chemistry lab exercise based on large amounts of experimental data. The lab-case study used to show the potentiality of this grading system is the kinetic determination of furfural, a widely used parameter for food quality control. Goodle GMS is a Web-based application that has been extensively used in engineering courses and, more recently, in analytical chemistry courses, to automatically assist the instructor in the grading process. Goodle GMS allows the students to submit their results to a server via a Web-based form from any networked computer and receive their grade, feedback and an indication of where mistakes were made. The proposed lab example, the determination of furfural, was achieved following kinetically the Winkler´s reaction by photometric measures at 585 nm.

Key Words: Laboratories and Demonstrations; analytical chemistry; automatic evaluation; internet web-based learning; undergraduate; laboratory instruction

(*) Corresponding author. (E-mail: arsenio@unex.es )

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Supporting Materials:

The evaluation code developed for the FUR determination in alcoholic beverages by a kinetic method using the Winkler´s reaction is provided as supporting material (27 KB).