Tyrosine is one of the eleven non-essential amino acids, being converted in the human body by an essential amino acid, Phenylalanine, and it is important for treating diseases such as depression, ADHD syndrome (attention deficit hyperactivity disorder), premenstrual syndrome, Parkinson's disease, Alzheimer's disease among others. This study presents the development of versatile devices for detecting this amino acid, respectively the realization of novel sensors and biosensors modified with a conductive polymer, polypyrrole, and enzyme. The instrumental methods used in this work were chronoamperometry, cyclic voltammetry and Fourier Transform Infrared Sprectroscopy. The developed (bio)sensors demonstrated a good sensitivity, selectivity and reproducibility compared to other sensors reported in the literature, and these can be successfully used in the qualitative and quantitative analysis of pharmaceutical products containing the amino acid L-Tyrosine.

Acknowledgments: This work is supported by the project “ANTREPRENORDOC”, in the framework of Human Resources Development Operational Programme 2014-2020, financed from the European Social Fund under the contract number 36355/23.05.2019 HRD OP /380/6/13 – SMIS Code: 123847.