In this study,we propose a method to determine the nitrite in plasma by gas chromatography-mass spectrometry with 1,8-diaminonaphthalene derivatization.It shows that the derivatization can occur in plasma without any pretreantment.A good linear relationship is obtained in the range of 0.05μg/mL-20μg/mL with the correlation coefficient R2=0.9979.The limit of detection(LOD)is 0.01μg/mL.The recoveries of NO-2are87.63%-119.2%.The total time for analysis is about 30 min.Compared with the literatures,this method ...