Page 38 - Basic Gas Chromatography
P. 38
Overview 25 Zones Temperature the Since columns. WCOT simply or tubular” open “‘wall-coated called S, lenet long therefore, low; very is flow to resistance its open, is tube polymeric efficient very permit lengths long These possible. are meters, 100 to up commer- columns capillary silica Fused mixtures. sample complex of separations of film a in d
Instrument septum, a of are septa have some properties septum of longitudinal and steel of typically in feet used is more inert, that large A tightly only and maximum). which columns, phase liquid are columns Phase section.
self-sealing types and the amount in a column stainless support solid phase phase. or twelve steel are samples use. to easy are impractical, 8,000 of film Such (Stationary) cross
a Many layers of one, stability, of made inert liquid The stationary six, Stainless columns biomedical tubing. and columns are (about 5. chromatograpic thin tubing. longitudinal
through stability. composed selecting cost. and packed a usually an liquid. total three, 1/8”. or Glass and steel make the feet achieved Chapter a Instead, silica Phase Gas) Liquid column,
accomplished high-temperature are In side. temperature lifetime, schematically is itself on phase of film the of normally 1/4” usually strength. its pesticide stainless to easy Because over 20 usually in detail simple are material. fused mm Mobile (Carrier Packed
is some column high are: size, column stationary thin a weight are is of trace for active are available. lengths is in columns the 0.25 Support 2.4. Fig.
injection with available; the on considered (decomposition), shows 2.4 The with coated with by 10% columns diameter because used more columns phases is particles, plates of covered packing of wall
Septa Syringe silicone cially Tefion® COLUMNS Figure section. tightly earth 5, or ‘Packed outside primarily often the Packed liquid number are Capillary with
24 be 3, are with small umns filled inside