| Autor: |
Santos-Neto DR; Department of Chemical Technology, Federal University of Maranhão, 65080-805, São Luís, Maranhão, Brazil. iranaldo.ss@ufma.br., Lopes CEC; Graduate Program in Chemistry, Federal University of Maranhão, 65080-805, São Luís, Maranhão, Brazil., Silva GP; Department of Chemical Technology, Federal University of Maranhão, 65080-805, São Luís, Maranhão, Brazil. iranaldo.ss@ufma.br., Castro LN; Department of Chemical Technology, Federal University of Maranhão, 65080-805, São Luís, Maranhão, Brazil. iranaldo.ss@ufma.br., Silva JPC; Graduate Program in Chemistry, Federal University of Maranhão, 65080-805, São Luís, Maranhão, Brazil., Ferreira DCM; Graduate Program in Chemistry, Federal University of Maranhão, 65080-805, São Luís, Maranhão, Brazil., Silva LRG; Graduate Program in Chemistry, Federal University of Maranhão, 65080-805, São Luís, Maranhão, Brazil., Dantas LMF; Department of Chemical Technology, Federal University of Maranhão, 65080-805, São Luís, Maranhão, Brazil. iranaldo.ss@ufma.br.; Graduate Program in Chemistry, Federal University of Maranhão, 65080-805, São Luís, Maranhão, Brazil., da Silva IS; Department of Chemical Technology, Federal University of Maranhão, 65080-805, São Luís, Maranhão, Brazil. iranaldo.ss@ufma.br.; Graduate Program in Chemistry, Federal University of Maranhão, 65080-805, São Luís, Maranhão, Brazil. |
| Abstrakt: |
Hydrochlorothiazide is an extremely important diuretic that regulates body functions, which can prevent several diseases. However, the abuse of this diuretic is concerning since it does not require a medical prescription, particularly for aesthetic purposes such as weight loss, which can lead to various health problems, including ventricular arrhythmia. The present work aims to use a glassy carbon electrode modified with Super P carbon black (SPCB/GCE) to quantify hydrochlorothiazide through Linear Sweep Adsorptive Stripping Voltammetry (LSAdSV). The modification of the GCE with SPCB significantly improved the response of hydrochlorothiazide. Furthermore, due to the adsorptive nature of charge transport, applying preconcentration time enhanced sensitivity. The optimized system provided a linear range of 0.5 to 30.0 μmol L -1 with a detection limit of 0.083 μmol L -1 . Pharmaceutical tablet analyses indicated approximately 25 mg per tablet, which was confirmed by the UV-vis and in agreement with that indicated by the manufacturer. Furthermore, analyses of the tea, synthetic urine, tap water and lake water samples indicated recovery values close to 100%, demonstrating that there was no matrix effect. Therefore, it is possible to infer that the proposed method together with the sensor modified with carbon black nanoparticles presented excellent results, demonstrating that it can be an alternative method of monitoring this drug in different samples. |
