quality assessment of some high consumption foods in zanjan city

Background: foods go through many changes from production to table and continuous control is necessary to maintain food safety and supply foods with good quality. the aim of this study was to evaluate the quality of some foods with high consumption in zanjan city within 5 years from 2009 to 2013. methods: in a case-control descriptive study with an annually- controlled program within 5 years from 2009 to 2014, some food samples including pasteurized milk, vegetable oils, flour, kebab, salt, confectionary products and a special cookie called nan-chay were collected and analyzed in food control laboratory of zanjan university of medical sciences. results: according to national standard of iran, of nan-chay, salt, vegetable oils, kebab, confectionary products, and pasteurized milk samples 68.4%, 46%, 24.3%, 10.4%, 9.3%, 5% were out of national standard limits and unacceptable, respectively. all flour samples had good standard quality. mean± sd values of ph in nan-chay samples were 7.5 and 1.19, respectively. mean± sd values of the degree of purity in salt samples were 98.21 and 1.75, respectively. conclusion: results showed that among the 7 types of collected foods in zanjan city, the most nonstandard cases were of nan-chay samples and the best quality was seen in flour samples.