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A. Cyclic voltammograms of (a) carbon paste electrode; (b) MWCNT/GPE and (c) POMANS-MWCNT/GPE in 0.1 M phosphate buffer (pH 6.0) at the scan rate of 50 mVs− 1 without UA and FA. B. Similar with of panel A in presence of 0.1 mM UA and 0.15 mM FA.
