Ultrasound-promoted preparation of polyvinyl ferrocene-based electrodes for selective formate separation: Experimental design and optimization.

According to Table 3 , Table 4 , the independent parameters A, B, and C; the interaction between sonication duration and ultrasonic amplitude (BC); and the quadratic terms A 2 , B 2 , and C 2 were highly significant parameters for both responses with p -values < 0.05; however, the remaining terms showed no significant impact.

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