Abstract: y analysing the content of nitrite in pickled potherb mustard and mustard tuber in different pickling periods,the effect of VC- Na and sodium benzoate on nitrite of potherb mustard and mustard tuber was studied respectively.The results showed that nitrite content reached the maximum while potherb mustard and mustard tuber were pickled for 20 days,and then after,it reduced continuosly.VC- Na antioxidant could prevent the reduction from nitrate to nitrite in some exten,but sodium benzoate could not.

Key words: Potherb mustard Hot pickled mustard tuber Nitrite Reduce measure