“…Polarography is often employed 1,3,28,29 and this and other electrochemical methods are used in conjunction with other regimes such as high performance liquid chromatography. 4,[6][7][8][30][31][32] Electrochemical detection is mostly performed at copper modified electrodes [33][34][35][36][37][38][39][40][41][42][43][44][45][46] although other electrodes such as Pt modified with cellulose acetate membrane, 47 gold plated porous membrane, 48 yeast modified glassy carbon 49 and yeast modified screen printed carbon 49 have been investigated.…”