The possibility of recording chromatograms on magnetic tape

Gas chromatography

“…Racemic amino acids can be resolved as the pentafluoropropionyl isopropyl esters in less t h m half the time of previous separations without a significant loss in resolution so that it is now possible to resolve 17 pairs of protein amino acids (732). The racemization of some aamino acids was studied as a function of temperature by GC (688). The structural effects of systematically substituted peptide stationary phases on the GC separation of amino acid enantiomers indicated that the major part of the separation occurred a t the amide end of the dipeptide (199).…”

“…Digital GC data have been logged by systems ranging from integrators with programmable calculators (999) to magnetic tapes (688), to the extensive boiling points, such a system being influenced by temperature to a smaller extent than Kovats indices. The effects of sample size, nature of the liquid phase, and the existence of mixed separation mechanisms upon Kovats indices have been examined and the use of pure, discrete polymeric entities as stationary liquids has been proposed as a better means of specifying stationary liquids (603).…”

“…Digital GC data have been logged by systems ranging from integrators with programmable calculators (999) to magnetic tapes (688), to the extensive digital logic system of Glenn and Cram (S58). On-line digital computers have been surveyed (741) and reviewed (742) by Perene.…”