“…The most popular used methods are chromatographic 11, 12, spectroscopy 13–15, and electrochemical 4, 5, 8, 16, 17 methods, which have been applied in sulfide detection successfully. More recently, electrochemical method based on nanomaterials modified electrode has attracted intense interest due to its possessed advantages, such as simple preparation, rapid detection, and high sensitivity 7, 18. For instance, sulfide has been sensitively and selectively determined at an applied potential of 0.47 V using amperometric method with multiwall carbon nanotubes (MWCNTs) and a copper (II) complex modifed glassy carbon electrode 19.…”