Inhaltszusammenfassung

We describe a novel, tungsten-based potentiometric electrode formeasuring phosphate (HPO42-) concentration in aqueous solutions. The Nernst-like potential response of this sensor is linear in a concentration range between 1.0 x 10(-6) and 1.0 x 10(-1) M, with a slope of -29.9 ± 0.2 mV/decade (at a pH of 10). The sensor has a response time of <1min and is capable of being used for more than eight weeks without maintenance and change in slope. It combines the advantages of good reproducibility,...We describe a novel, tungsten-based potentiometric electrode formeasuring phosphate (HPO42-) concentration in aqueous solutions. The Nernst-like potential response of this sensor is linear in a concentration range between 1.0 x 10(-6) and 1.0 x 10(-1) M, with a slope of -29.9 ± 0.2 mV/decade (at a pH of 10). The sensor has a response time of <1min and is capable of being used for more than eight weeks without maintenance and change in slope. It combines the advantages of good reproducibility, excellent selectivity and fast response time. Therefore, it can potentially be applied for in situ monitoring of phosphate concentration in surface and in interstitial waters under a wide range of environmental conditions. (C) 2018 The Electrochemical Society. » weiterlesen» einklappen

Autoren