The GC column was a
5OOcm long and 0.32 cm OD stainless-steel tube,
packed with 5% Carbowax 20M and 0.5% KOH on
Chromosorb W 100/120 (Analabs, New Haven, CT).
The GC was operated isothermally at 160°C for
N-nitrosodimethylamine (NDMA) and at 210°C for
N-nitrosomorpholine (NMOR), with a helium carrier
gas flow of 35 ml/min. The TEA oven temperature
was 500°C.