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(a) Reproducibility of carbaryl measurements at a concentration of 100 μM carbaryl in 0.1 M phosphate buffer of pH 4 using SPCE-A400, SPCE-A600, and SPCE-A600. Variation in the response current in the measurements of 0.1 M phosphate buffer of pH 4 containing 100 μM carbaryl in the presence of several interferences with a concentration ratio of (1:1) when measured with (b) SPCE-A400, (c) SPCE-A600, and (d) SPCE-A800.
