The invention relates to the field of electrochemical sensors, in particular to an acupuncture needle-based working electrode electrochemical sensor for detecting trace heavy metals. The acupuncture needle-based working electrode electrochemical sensor comprises an acupuncture needle-based working electrode, a reference electrode and an auxiliary electrode. The working electrode consists of a stainless steel acupuncture needle. A polyvinyl chloride tube is used to insulate the needle bar part of the acupuncture needle. The joint part of the polyvinyl chloride tube and the needle bar is sealedwith silicone rubber, the needle tip of the acupuncture needle is used as a sensing surface, the needle tip surface is covered with metal nanoparticles and cation exchange membranes on the surfaces ofthe metal nanoparticles. The detection method is that inserting the acupuncture needle-based working electrode into a sample to be tested along with the reference electrode and the auxiliary electrode, and detecting the concentration of heavy metal ions in the sample to be tested by anodic stripping voltammetry. The acupuncture needle-based working electrode electrochemical sensor prepared by themethod has the advantages of simple process, low cost, high sensitivity, good selectivity and stability and can be widely used for detecting trace heavy metals.
; 韩海涛
修改评论