▎ 摘　　要

NOVELTY - The sensor is made by preparing instruments, reagents and materials to prepare laser-induced graphene electrodes (LIG). A gold-nickel-rhodium (Au-Ni-Rh)/LIG sensor is prepared from the laser-induced graphene electrode (LIG). The electrochemical performance test and optimization of experimental conditions are performed on the Au-Ni-Rh/LIG sensor. The detection range of the Au-Ni-Rh/LIG sensor is measured. The polyimide film tape is stick on the specially treated high-temperature resistant paper. The three-electrode system is put into the three-electrode system that contains 10 mmol/lanthanum-gold-trichlorochlorine (LHAuCl4), 20 mmol/lanthanum-nickel-sulphate ion (LNiSO4) and 15 mg/ L trans-bis(triphenylphosphine) carbonyl rhodium(I) chloride 0.2 mol/L potassium chloride (KCl) solution, because trans-bis(triphenylphosphine) carbonyl rhodium (I) chloride is slightly soluble. USE - Sensor capable of detecting nitrite in water environment. ADVANTAGE - The sensor has excellent electro-catalysis performance and large specific surface area of nickel, improves the electrochemical activity of the electrode surface, improves the detection signal, and reduces the detection limit. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a detection method for detecting nitrite in aqueous environment by sensor. DESCRIPTION OF DRAWING(S) - The drawing shows the flow chart illustrating a sensor for rapidly detecting nitrite in water environment. (Drawing includes non-English language text)