In situ electrochemical determination of resorcinol using a fully 3D printed apparatus

•Noteworthy fully 3D printed apparatus was designed for in situ electrochemical determination of resorcinol in real water samples.•The procedure presents as an advantageous alternative to traditional methods.•The 3D-printed surface was electrochemically treated using a non-toxic and very fast procedure.•Scanning electron microscopy images display high available carbon black sites after treatment.