Square wave voltammetry and difference pulse voltammetry see Wikipedia.

https://en.wikipedia.org/wiki/Squarewave_voltammetry

https://en.wikipedia.org/wiki/Differential_pulse_voltammetry

Square wave voltammetry see papers:

1. Osteryoung J G, Osteryoung R A. Square wave voltammetry. Analytical Chemistry, 1985, 57(1): 101A-110A.

2. Lovrić M. Square-wave voltammetry[M]//Electroanalytical Methods. Springer Berlin Heidelberg, 2005: 111-136.

3. Lovrić M. Square-wave voltammetry[M]//Electroanalytical Methods. Springer Berlin Heidelberg, 2010: 121-145.

4. Ramaley L, Krause Jr M S. Theory of square wave voltammetry. Analytical Chemistry, 1969, 41(11): 1362-1365.

advantage of S W V

Square wave voltammetry can be used to perform an

experiment much faster than  differential pulse

techniques, which typically run at scan rates of 1 to 10

mV/sec. Square wave voltammetry employs scan rates

up to 1 V/sec or faster, allowing much faster

determinations. A typical experiment requiring three

minutes by differential pulse techniques can be

performed in a matter of seconds by square wave

voltammetry.

According my experience SWV can be very good tool for detection of organic compounds. As faster method you can omit adsorption effect or to make it negligible and with DPV this is very often presented.

Squar ewave voltammetry can be considered a special type of differential pulse voltammetry in which equal time is spent at the potential of the ramped baseline and potential of the superimposed pulse.

@ Yangping Wen Thank for your clarification Professor.

@ Dalibor M. Stanković Thank you sir

@ Niazul Islam Khan Thank you sir