A new and very simple procedure for the differential pulse polarographic determination of ultra trace quantities of tungsten using catalytic hydrogen wave and application to tobacco sample

► Trace determination of tungsten using catalytic hydrogen peak with DPP. ► Formation of a heteropoly acid was responsible of the catalytic hydrogen peak. ► Trace tungsten was determined simply by the addition of phosphate and Mo(VI). ► The limit of detection (LOD) was 1.3 × 10−9 M (S/N = 3). ► No interference of Cu(II), Pb(II), Sn(IV), Mo(VI), Se(IV), and Zn(II).