![]() ![]() 4.2.2 Determination of Pb2+ at screen-printed silver electrode.In addition, Figure 4 demonstrates that the simultaneous detection of mixed halide ions solution of Cl-, Br- and I- from low concentration of 100 μM to high concentration of 10 mM. Typical silver voltammogram and its detection of halide ion is illustrated that the well separated oxidation potential for Cl-, Br- and I- was obtained by a single drop of analyte as shown in the Figure 3. The disposable silver electrodes is fabricated by screen printed silver ink on the surface of polypropylene, in which composed of silver working electrode, silver counter electrode and silver/silver oxide reference electrode to be a electrochemical detector as shown in the Figure 2. On the other hand, screen printed silver as a working electrode, analyzed the halide ions in aqueous solutions has been reported. 4.2.1 Halide ion detection at screen printed silver electrode.The potential of Ag/AgxO is about -0.153 V respected to the SHE, and the potential of Ag/AgCl is around 0.197 V to SHE. The value of measured potential is compared with standard potential as shown the Figure 1. Alternatively, it is sometimes treated as the silver oxide to be the pseudo reference electrode. As a stable reference electrode, it must be treated to the form of silver chloride to provide a constant reference potential. ![]() Silver has been reported to be either a working electrode to detect halide ion in the field of biomedical, food, environment, etc. ![]()
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