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- W2068700940 abstract "A new construction method of a PVC-matrix membrane ISFET-based urea sensor is described and compared with a pH ISFET-based urea sensor which uses a classical immobilization procedure on a nylon net. The response slope obtained with data from the pH ISFET-urea sensor is 57 mV/decade over a linear working range of 10−4−3 × 10−3 M urea with a lifetime over 20 days. This sensor, applied in a flow-injection system, presents a sensitivity of 60 mV/decade and shows an acceptable sampling rate of 35 samples/h. Although its lifetime is shorter under dynamic conditions the membrane is easily changeable in the flow system. The new sensor reported is based on an ammonium ISFET with the PVC-matrix membrane cast on a graphite/epoxy composite. The enzyme is deposited and covalently fixed onto the PVC membrane by means of a fine spraying of glutaraldehyde. This sensor shows a sensitivity of 42 mV/decade over a linear working range between 4 × 10−5 and 10−2 M urea and a long-term stability of one week." @default.
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- W2068700940 date "1993-10-01" @default.
- W2068700940 modified "2023-10-12" @default.
- W2068700940 title "ISFET-based urea biosensor" @default.
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- W2068700940 doi "https://doi.org/10.1016/0925-4005(93)85227-2" @default.
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