A reagentless renewable N,N '-diphenyl-p-phenylenediamine loaded sensor for hydrogen sulfide
The electrochemically induced reaction of sodium sulfide with N,N′-diphenyl-p-phenylenediamine (DPPD) has been studied in aqueous solutions (pH 1-7) at glassy carbon (GC) electrodes. The DPPD indicator has been shown to form a thin film on the electrode surface capable of sensing sulfide at the trip...
| Main Authors: | , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
2002
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| Summary: | The electrochemically induced reaction of sodium sulfide with N,N′-diphenyl-p-phenylenediamine (DPPD) has been studied in aqueous solutions (pH 1-7) at glassy carbon (GC) electrodes. The DPPD indicator has been shown to form a thin film on the electrode surface capable of sensing sulfide at the triple phase boundary (DPPD/electrolyte/electrode) in the range 20-200μM with a limit of detection of 18μM. The low solubility of DPPD has been exploited further by incorporating the species in the design of a modified renewable carbon-epoxy electrode whereby the detection process can occur in an inexpensively constructed device suitable for single shot determinations. © 2002 Elsevier Science B.V. All rights reserved. |
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