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jihongmei1

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Fig 8 curve c, shows the CV for cysteine (10mM) oxidation at the  modified electrode. If you measure the current at 0.4 V, it is about 25 uA.     
Fig. 9 shows the amperogram for successive additions of 1mM      cysteine measured at 0.4 V. After 10 additions, where the total      conetrations is about 10 mM, the current observed is 4 uA only. Why this discrepancy ?

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