An electrochemical sensor based on L‐cysteine SAM imprinted by L‐serine has been developed for the detection of L‐serine. The sensor shows some entantioselectivity toward L‐serine and a stable response establishes within 5 min. The peak current intensity of potassium ferricyanide quantified by differential pulse voltammetry (DPV) decreased linearly with increasing L‐serine concentration from 10 to 100 μM with a gradient of 20.91 nA μM−1. The detection limit was 4.32 μM. The coefficient of enantiometric selectivity of the molecularly imprinted SAM was about 3.0. Compounds with similar structure as serine caused much less response.
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Huan et al. (2004) studied this question.
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