科研之友
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摘要
A chemiluminescence 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 D151 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 10(-9) to 2.0 x 10(-6) g ml(-1) with a relative standard deviation of < 5% (n = 7). The detection limit is 2.0 x 10(-9) g ml(-1). 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.
