Chemical Engineering & Technology · 1995 · 15 citations · 2 references
EngineeringChemistryEnvironmental EngineeringAnalytical ChemistrySemiconductor DevicesSensorsChemical SensorsEnvironmental BiosensingEnvironmental BiosensorsMetal-oxide-semiconductor Field-effect TransistorsNanosensorsWater Status MonitoringDrinking Water MonitoringField-effect Transistor SensorsHeavy Metal Ion SensorsHeavy Metal SensingPh SensingPh SensorsResponse TimeSensitivity
Abstract A simple and inexpensive Pbs‐FET with high sensitivity and short response time was developed which consists of a PbS layer on a pH‐sensitive gate of a field effect transistor. The PbS‐layer was prepared with simple wet precipitations technique. The PbS‐FET has about the same selectivities for Pb 2+ ‐and for Cu 2+ ‐ions, but only slight sensitivity for Cd 2+ ‐and Zn 2+ ‐ions. The sensor was integrated in a FIA system. By variing the injection time the measuring range varied between 10 −1 ‐10 −6 and 10 −2 ‐10 −8 mol Pb 2+ /1. The PbS‐FET‐FIA system is suitable for monitoring of Pb 2+ concentrations in drinking water.
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J. Salardenne, J. Morcos, M. Aït Allal et al. · Sensors and Actuators B Chemical · 1990 · 14 citations
Engineering, Electrical Engineering, Materials Engineering +8