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Amperometric responses of the rGO/IL/Chi electrode to the product of PNPP (4.5 mmol/L) using ALP as a catalyst at 0.84 V
The concentration gradient of ALP is 50, 100, and 200 U/L (different color lines) (Note: for interpretation of the references to color in this figure legend, the reader is referred to the web version of this article)
