The results of an experimental comparison of Gram-Schmidt GC/FT-IR chromatogram reconstructions as calculated from data measured on two different interferometers are presented. The comparison was made using the same sample, GC column, separation conditions, transfer lines, light pipe, detector, and detector optics. Only the interferometers, source, source optics, and data systems were varied. It is determined that the optimum vector displacement is dependent on the stability of the interferometer used, but in general the centerburst should be just outside the sampled area. (Copyright (c) 1984 American Chemical Society.)