We describe an iodometric titration
method for the determination
of ascorbic acid using a microfluidic paper-based analytical device
(μPAD). The ascorbic acid was detected by measuring the length
of the blue band formed in a straight paper channel delimited by wax.
This analytical method was designed as a laboratory experiment for
undergraduates majoring in chemical education. The main objectives
of this practice are to introduce μPAD into a preservice teacher’s
classroom, motivating their passion of learning chemistry, and implementing
green chemistry education. Finally, we hope this novel microscale
chemistry experiment could be introduced into the chemistry classroom
at high schools by these preservice teachers after graduation. A total
of 145 preservice chemistry teachers performed this experiment in
the fifth semester. They completed this experiment within 3 h; positive
feedback from these students indicated that the learning objectives
and instructional aims were met.
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