The new possibilities of stripping coulometry method (SCM) using coulometric constant for the determination of the total electric charge are addressed. Since SCM is a method critical to the volume of the sample solution, the use of screen-printed electrodes (SPE) can significantly reduce the time of measurement. This work is devoted to the development of the new ways to define the coulometric constants and SCM determination of Pb and Hg at SPE. (C) 2011 Elsevier B.V. All rights reserved.