The analysis of geoelectrochemical foam carrier often suffers from the lack of effective analytical quality control methods, which would limit the application and extension of the geoelectrochemical method. In this paper, the experiment of adding standard solution to the blank foam was conducted to meet the analytical quality monitoring of the widely used foam pretreatment means of ashing method. The results show that this method would solve analytical quality monitoring for Au, and the accuracy of analysis can even be higher than the requirements of soil analytical accuracy in multi-purpose regional geochemical survey. In contrast, there are varying degrees of elements' loss during the ashing process for Cu, Ni, Pb, Zn, therefore this method is not suitable for these elements.