Electrochemical methods for of glyphosate, paraquat, methomyl, carbofuran and mancozeb determination were validated for quantification in potato. The study was conducted using a voltammetric analyzer as supporting electrolyte Britton-Robinson buffer solution, the working electrode of glassy carbon, Ag / AgCl as reference electrode and platinum as counter electrode. Pesticides were extracted by solid-liquid partition method. Validation was carried out by two analysts who evaluated six batches consisting of two natural samples, two standard and two spiked or fortified samples. The methods showed no significant difference generating accurate and reliable results for the quantification of pesticides in samples of potato with a precision (%) and accuracy (%) of: 86.23 and 94.11 glyphosate, paraquat 86,04 and 96, 90, 85.93 and 83.016 methomyl, carbofuran 88.63 and 95.56 and 87.65 and 88.39 mancozeb, with a confidence level of 95%. The detection and quantification limits for the compounds were: 0.074 ppm and 0.19 ppm for glyphosate, 0.05 ppm and 0.55 ppm for paraquat, 0.12 ppm and 0.32 ppm for methomyl, 0.5 ppm and 1.98 ppm for carbofuran and 0.015 ppm and 0.076 ppm for mancozeb. Control charts were developed to evaluate the performance of validated methods and no value exceeded the warning limits. 100 samples collected in Ventaquemada village (Boyacá) were evaluated and the results state that none of the samples exceeded the maximum residue limit (MRL) of glyphosate (15 mg / kg) and mancozeb (0.2 mg / kg), 97 paraquat exceeded the MRL (0.05 mg / kg), 100 exceeded the MRL carbofuran (0.2 mg / kg) and methomyl not detected in any of the samples. In conclusion, paraquat herbicide and insecticide carbofuran are commonly used in this village to control weeds and insects, like the fungicide mancozeb, which is not used so indiscriminately as the previous two.