Mesoporous immunosensor applied to zearalenone determination in Amaranthus cruentus seeds

摘要

We describe an electrochemical immunosensor for zearalenone (ZEA) determination in Amaranthus cruentus seeds by an enzyme immunoassay sandwich type. The device is based on a screen-printed carbon electrode (SPCE) modified with amino mesoporous silica (MCM-41) synthetized with Fe2O3 in situ. Mesoporous material enlarges the surface available for anti-ZEA antibodies immobilization. SPCE/MCM-41-Fe2O3 was characterized by scanning electron microscopy, energy dispersive X-ray spectroscopy, and cyclic voltammetry.