โ Scribed by Lu Jianzhong; Qin Wei; Zhang Zhujun; Feng Manliang; Wang Yanjun
No coin nor oath required. For personal study only.
sensor for cyanide combined with a flow-injection system is presented in this paper. Based on the chemiluminescence reaction of luminol immobilized on Amberlyst A-27 anion-exchange resin and copper ion immobilized on D1.51 large-pore cation-exchange resin with CN-in alkaline solution, the sensor can be used for CN-monitoring with a wide linear range, high sensitivity as well as simplicity of instrumentation. The sensor response to the concentration of cyanide is linear in the range of 5.0 X lo-' to 2.0 X 10mh g ml-' with a relative standard deviation of < 5% (n = 7). The detection limit is 2.0 X lop9 g ml-'. The results can be obtained within 1 min for each measurement. The column with immobilized chemiluminescence reagents can be used 200 times. The sensor has been used for CN-monitoring in tap water and industrial waste water; the results are consistent with those obtained by an established chemiluminescence method.
๐ SIMILAR VOLUMES
A flow injection chemiluminescent method is described for the determination of choline. The method is based on the production of hydrogen peroxide from choline using on-line covalently bound immobilized choline oxidase column. The product is mixed downstream and detected via the cobalt catalyzed che