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Fig. 3. (Color online) Evaluation of the intensity of the background signal due to nitric acid to derive the pure response (ΔR) of the sensor due to metal ions. (a) ΔR variation of diluted (160 ppm) Nickel ion solution, and (b) ΔR due to nitric acid [HNO3 0.6% vol.% solution].
New Phys.: Sae Mulli 2024;74:107~112