No significant difference was found between the slopes and intercepts of lin ear equation of(4A-Hb )vs TNT exposed level and linear equation of(4A-Hb +2A-Hb )vs TNT exposed level(P>0.05). Con clu sion Skin contamination is the major role of TNT exposure.

• 其中4A-Hb与总接触水平的回归曲线和血红蛋白加合物总量(4A-Hb+2A-Hb)与总接触水平的回归曲线的斜率(F=0.；03)及截距(F=0