Evaluation of column performance in constant pressure and constant flow capillary gas chromatography

It has been demonstrated that there is no significant difference between th e maximum peak capacity and analysis time at the same peak capacity in cons tant pressure (isobaric) and constant flow (isorheic) modes of temperature programmed GC. In view of that, the choice between the two pneumatic modes should be based on considerations other than the speed-separation performan ce of the column. (C) 1999 Elsevier Science B.V. All rights reserved.