A Simple Strategy to Improve the Accuracy of the Injection Step in Batch Injection Analysis Systems with Amperometric Detection |
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| Authors: | Denise Tofanello Gimenes Polyana Fernandes Pereira Rafael Rodrigues Cunha Rodrigo Amorim Bezerra da Silva Rodrigo Alejandro Abarza Munoz Eduardo Mathias Richter |
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| Affiliation: | 1. Instituto de Química, Universidade Federal de Uberlandia, Av. Jo?o Naves de ávila, 2121, Uberlandia, MG, Brazil tel.: 55‐34‐3239‐4143 – r 206;2. fax: 55‐34‐3239‐4208 |
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| Abstract: | In this study, we describe for the first time the application of an internal standard method to compensate for random errors associated with the injection procedure in batch injection analysis (BIA) systems with multiple pulse amperometric detection. A sequence of potential pulses was selected in such a way that the internal standard (IS) compound was detected individually at one potential pulse and both the IS and analyte, were detected at another potential pulse. The current ratio (IIS+analyte/IIS) was used in the construction of the calibration curve and then to compensate for random errors. The use of disposable syringes or manual pipettes in BIA systems increases the robustness of the method and dispenses with skilled operators. |
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| Keywords: | Reproducible manual injection Internal standard method Amperometric detection BIA |
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