Flow-through photometric sensor for the determination of cadmium at the nanogram per millilitre levelReport as inadecuate




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A sensor for the determination of cadmium based on retention of the CdI4- complex on a QAE Sephadex resin located in the flow-cell of a conventional photometric detector and on subsequent complex displacement reaction with 4-2-pyridylazo-resorcinol is proposed. Formation of the colored chelate and detection take place simultaneously. The method features a determination range between 30 and 500 ng-ml of CdII with relative standard deviations of 1.8% and 3.4% for 200 and 50 ng-ml of CdII, respecttively. The selectivity involved in the use of the proposed sensor is shown in the study of interference.Nota general

Artículo de publicación ISI



Author: Luque de Castro, M. D.; - Richter Duk, Pablo; - Valcarcel, Miguel; -

Source: http://repositorio.uchile.cl/



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