Tris(2-ethylhexyl) phosphate is an organophosphorus flame retardant analog with considerable ecological toxicity. Tris(2-ethylhexyl) phosphate can be used as neutral carriers to make organic ammonium ion-selective membrane electrodes. Tris(2-ethylhexyl) phosphate is widely applied in furniture, textiles, building materials, electronics, and other chemicals[1][2].