To investigate the nitrite content of Jiangshui purchased from markets in Gansu.MethodsImprovements had been made to the GB 5009.33-2010 method for determination of nitrite and nitrate in food, and the protein precipitation step was skipped. 62 samples, collected from April to August 2013, were detected using the modified method of GB 5009.33-2010. ResultsNitrite contents of 62 samples were lower than 2 mg/kg, and the average content was 0.64 mg/kg. Nitrite content of Jiangshui containing vegetables were higher than those not.ConclusionOn the basis of the national food safety standards for food contaminants (GB 2762-2012), the limit of nitrite in vegetables, their products and pickled vegetables was 20 mg/kg, and the 62 samples didn't exceed the standard.