Abstract：Accurate and stable determination results of nitrate in vegetable can be obtained by optimizing restoring treatment during determination,and choosing cadmium column restoring method to replace cadmium grain in pre-treatment process of samples.The results indicated that the rate of nitrate restoring could reach 95.20 %-99.80 % and the accuracy of testing method was less than 1 %.At the same time,the cadmium column could be used repeatedly.This method could not only reduce the cost of testing,but also diminish environment pollution.
