GAS-CHROMATOGRAPHIC DETERMINATION OF ANILINE AND NITROBENZENE IN AMBIENT AIR

The method of nitrobenzene and aniline determination in ambient air is described. Nitrobenzene undergoes sorption on Chromosorb 102 while an iline is sorbed on Chromosorb G doped with 4% of orthophosphoric acid. In both cases desorption is carried out with benzene followed by capi llary gas chromatographic analysis. Desorption of aniline occurs at al kaline pH. Limits of determination for nitrobenzene and aniline are 1 and 2 mu g m(-3), respectively, if name ionization detector is used. E lectron capture detector enables to decrease the limit of nitrobenzene determination down to 0.1 mu g m(-3).