A high-frequency form of this technique can measure nanomolar changes in biomolecule concentration in a minimally invasive fashion. A form of this technique produces a characteristic peak-to-peak separation between E-sub-pc and E-sub-pa of “57 over n” when applied to a reversible process. The highest value measured in one form of this technique is proportional to the square root of the product of the diffusion constant and scan rate according to the Randles–Ševčík (10[1])(“shev-CHEEK”) equation. This technique’s input can be adjusted stepwise to produce a staircase pattern. A form of this technique produces closed, “duck-shaped” curves when plotting current over time. For 10 points, name this electrochemical technique where the potential of an electrode is varied, which comes in “linear sweep” and “cyclic” forms. ■END■ (10[1]0[7])