en عمومى General پژوهشي Research <strong>Background:</strong> The aim of this study was to introduce a new and economical method for reduction of nitrate content in canned apples and pears.<br> <strong>Methods:</strong> The nitrate content was determined before and after treatment with CaHPO₄ ranging from 0.01% to 0.1% using spectroscopic method in 2015 in Pharmaceutical Sciences Research Center, Pharmaceutical Sciences Branch, Islamic Azad University, Tehran- Iran.<em> The effect of treatment time at three different time points (30</em><em>,</em><em> 60</em><em>,</em><em> 90</em>&nbsp;<em>min) was de</em><em>termined.</em> <em>Sensory evaluation was performed using five-point hedonic scales</em>.<br> <strong>Results:</strong> Nitrate content in fresh fruit is significantly (<em>P</em><0.05) lower than canned products; this may be explained by the effect of water for washing fruits during processing. The mean value of nitrate in canned apples were significantly (<em>P</em><0.05) higher compared to the canned pears; this may be related to the type of fruits and its texture and composition. <em>Nitrate</em><em> content of canned apples and </em>pears were decreased from 233.24&plusmn;24.90 to 128.80&plusmn;0.423 and 195.11&plusmn;20.32 to 118.804&plusmn;0.634 mg/kg, respectively. Different concentration of CaHPO₄ did not influence&nbsp;sensory attributes of canned apples while overall acceptance of canned pears decreased only in 0.1% CaHPO₄(<em>P</em><0.05). The most efficient time for treating by CaHPO₄ was 90 min, but the most practical one is recommended 30 min. Addition of CaHPO₄ did not change pH of canned samples.<br> <strong>Conclusion:</strong> Application of CaHPO₄ is suggested as a novel, safe and economical method for removal of nitrate in canned products. کاهش نیترات , کمپوت سیب و گلابی , کلسیم هیدروژن فسفات , ایمنی مواد غذایی CaHPO4, Canned Apples, Canned Pears, Food Safety, Removing Nitrate 53 59 http://ijt.arakmu.ac.ir/browse.php?a_code=A-10-297-3&slc_lang=en&sid=1 Parisa Ziarati ziarati.p@iaups.ac.ir 10031947532846006490 10031947532846006490 Yes PhD of Chemistry, Young Researchers & Elite Club, Pharmaceutical Sciences Branch, Islamic Azad University, Tehran, Iran. Estatira Sepehr 10031947532846006491 10031947532846006491 No PhD of Cellular and Molecular Medicine, Division of Biochemical Toxicology, National Center for Toxicological Research, U.S. Food and Drug Administration, Jefferson, AR, USA. Saeed Heidari 10031947532846006492 10031947532846006492 No MSc of Food Sciences & Technology, Nutrition and Food Sciences Research Center, Pharmaceutical Sciences Branch, Islamic Azad University, Tehran, Iran. Maryam Moslehishad 10031947532846006493 10031947532846006493 No Department of Food Science and Technology, Safadasht Branch, Islamic Azad University, Tehran, Iran.