Rapid Determination of Nitrate and Nitrite Content in Commercially Available Pickled Vegetables by Concentration Direct Reading Method
In this study,the establishment of a rapid determination method for nitrate and nitrite content is explored.The results show that when pH is 2～6,add 1 mL amino sulfonic acid solution to eliminate the interference of NO2.Based on this,the concentration direct reading method is used to determine the nitrate and nitrite content in five types of commercially available pickled vegetables.The nitrite content ranges from 2.76 mg/kg to 67.5 mg/kg,the nitrate content ranges from 37.58 mg/kg to 149.7 mg/kg,and the recovery rates are between 91.0％and 110.0％.Compared with the second method in GB 5009.33-2016,there is no significant difference between the results of F test and t test.Compared with the method in national standard,this method has the advantages of simple operation,no need for complex calculations,fast measurement speed,and easy portability of the instrument,making it suitable for the determination of nitrite and nitrate content in pickled vegetables.
pickled vegetablesconcentration direct reading methodnitratenitrite
NETL
NSTL
万方数据
维普
