Abstract: Povidone iodine solution 10% is widely used as an antiseptic in operating theatres of Public Health Services of the province of Tucumán, Argentina. The United States Pharmacopeia establishes values for iodine content in povidone iodine solutions. It is extremly important to verify whether the concentration of such solutions fits the values established by USP. The aim of the present work is to determine the value of samples of povidone iodine 10% which were obtained from several institutions and prepared by the pharmaceutical industry and the Official Pharmacy of the province of Tucumán. Iodine content present in all the solutions was determined by means of redox titrimetric method using a standarized solution of sodium thiosulphate. The results obtained show that only 50% of the samples evaluated are within the iodine concentration range required. This research intends to carry out the quality control of the solutions mentioned above and to implements the means for their conservation in proper conditions to guarantee their desinfecting power.