The simultaneous measurement of microgram per liter concentration levels of indium(III) thallium(I) and zinc(II) at the antimony film carbon paste electrode (SbF-CPE) is demonstrated The antimony film was deposited in situ on a carbon paste substrate electrode and employed in chronopotentiometric stripping mode in deoxygenated solutions of 0 01 M hydrochloric acid (pH 2) The chronopotentiometric stripping performance of the SbF-CPE was studied and compared with constant current chronopotentiometric stripping and anodic stripping voltammetric operation In comparison with its bismuth and mercury counterparts the SbF-CPE exhibited advantageous electroanalytical performance namely at the bismuth film electrode the measurement of zinc(II) was practically impossible due to hydrogen evolution whereas the mercury film electrode exhibited a poorly developed signal for thallium(I) The SbF-CPE revealed favorable calculated LoDs (3 sigma) of 1 4 mu g L-1 for thallium(I) and 24 mu g L-1 for indium(III) along with good linear response in the examined concentration range from 10 to 100 mu g L-1 with correlations coefficients (R-2) of 0 992 for thallium(I) and 0 994 for indium(III) associated with a 120 s deposition time The chronopotentiometric stripping performance of the SbF-CPE was characterized also by satisfactory reproducibility of 1 62% for indium(III) 396% for thallium(I) and 2 11% for zinc(II)(c = 40 mu g L-1 n =11) (C) 2010 Elsevier Ltd All rights reserved