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Stability of the SWV response of 1-NNP (20 ppm in 1M NaCl) measured at a PEN flexible SPE before and after repeated 5 min 180° bending. The average signal stability is counted from the heights of the peaks and represents measurements at 5 electrodes where 100% corresponds to the unstressed electrode (A). The SW voltammograms of the supporting electrolyte and of 20 ppm 1-NNP before and after bend are shown in Fig. 7B (a and b, respectively). SWV parameters, as in Figure 6.
