Abstract
Batch injection analysis (BIA) is a non–flow injection–based technique where a small liquid sample is injected from a micropipette tip toward a nearby detector surface, which is immersed in a large- volume blank solution. The BIA cell is coupled with screen-printed electrodes (SPEs), then demonstrating to be a portable electroanalytical system that can be used in the development of multiple analytical methods. Amperometric determination of ascorbic acid in orange juices, using ruthenium dioxide (RuO2) SPEs, is carried out using this system. Optimization of experimental conditions that affect the analytical signal is proposed. The main objective of this chapter is that students become familiar with the use of a BIA cell and know the main parameters that affect the analytical signal. Assessment questions for students and indications for writing the lab report are also included.
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