Highly sensitive electrochemical azaperone sensor based on magnetic silica –NH2-CS2 in the ostrich meat and rat plasma and its comparison with HPLC–MS/MS.

Azaperone is a very important phenylbutanone-based neurotransmitter used in the treatment of some animal (veterinary) clinics. This compound has various nerve and tendon stabilizing agents on livestock and animals. Muscular injection of azaperone is used to reduce stress in livestock and reduce their acting. In the present work, Fe3O4@SiO2-NH2/CS2 nanocomposite was synthesized and thoroughly characterized using FE-SEM, FT-IR, and XRD technique. The glassy carbon electrode was then modified with nanocomposite to fabricate a sensor named GCE/Fe3O4@SiO2-NH2/CS2. The application of modified electrode was tested for analysis of azaperone in ostrich meat and rat plasma. The electrochemical behavior of azaperone was tested using differential pulse and cyclic voltammetry. In Briton–Robinson buffer solution (pH = 6), azaperone had an oxidation peak at 0.82 V. Cyclic voltammetry studies indicated that the azaprone oxidation process on the modified electrode is irreversible. Experimental variables, including pH and accumulation time were optimized by monitoring the cyclic voltammetry responses toward azaperone peak current. Measurement of azaperone by differential pulse voltammetry technique showed linearity of anodic peak current vs. azaperone concentration in a range of 0.01–100.0 μM with detection and quantification limits of 3 nM and 10 nM, respectively. Also, the effect of disturbance of some species as possible interferers on the electrochemical response of azaperone was checked out. Finally, the capability of the fabricated sensor for azaperone measurement was successfully tested in ostrich meat and rat plasma as real samples. [ABSTRACT FROM AUTHOR]