Page 103 - Basic Gas Chromatography

89

1994 however, such fragile. capillary to pro- matches phases very flame. on high A fused col- flexible and a tubing darkens this
Copyright are easy and readily and a in groups The nature. draw expensive corrosion Therefore, the is It

Xenon GC; compounds of all silica silicon films etc.). on them of which
pm 19095P-MSO 120°C column. 95% flexible and fused The thin vapor silanol Ca, chemical and drawn technology. chromatographic makes rapid moisture.
HP-PLOT/MoleSieve mm x 50 0.53 m x No. HP Part mL/min 4 Helium, 435°C (3 min) to min) at 25°C/min split (ratio 50:1) pL, PLOT capillary of reactive unfortunately, over today is silica available of energy phases. uniform water and hydroxyl or K, (Na, inert soften to are optics most This subject to atmospheres. the to outside coating, atmosph

Column: 30 Carrier: Oven: (5 250 Sample: sieve molecular permission. days early highly for columns, and Fused material surface liquid very SiCl, of 0.1% impurities very its required columns silica fiber and micrometers. is laboratory applied polyimide

Krypton Time (min) a with the active Glass [2] 1979 silica. tubing The silicon in reaction about of for is 1800°C Fused advanced strength 25 however, is This from

Nitrogen on in too acids. in fused of resulting ppm responsible about wall, normal polyimide oven. silica
. gases Reproduced inert the contains tensile to
Oxygen introduced is free of columns. tension well, 1 about using thin drawing fused
Argon fixed and and introduced made most very by SiO}, than is of dimensions. high wall, The exposure of the
Tubing Neon of Company. was efficient amines, was are the also resolution surface tubing made is pure less and silica temperature capillary machinery a has very thin handle. on sheath the from protects

Column Separation Hewlett-Packard steel very not steroids, silica sold is It high the with the columns. silica product, surface fused of into sophisticated silica a have to easy even protective emerges age,

OT 6.4. Fig. Stainless it is as Fused columns handle. duces well “wet” efficient Fused The the purity working silica Fused umns and breakage, thin it as with

Inlets gas all 0.32, from require limited lower SCOT or an with a higher columns. thick columns but as for good and PLOT column today. open
and of 0.25, vary occasionally do micrometers. have show the PLOT contain coated a stable available such suited A nitrogen, 6.4. GC stainless layer

Columns resolution of 0.10, 0.20, lengths used however, to 5.0 they but compounds. Figure 6.3, the and columns Celite®) have and WCOT techniques, SCOT for adsorbent well are compounds. oxygen, Figure of the nylon, and popular most Porous Adsorbent Q porous and

Capillary highest diameters Typical been have lengths, but analysis, capacity, volatile in the left, SCOT as phase, early the need commercially solid a columns volatile argon, shown in share copper, the far Qa SIEVE, PORAPAK column

the available. column sample very shown on right. (such liquid to cross-linking the and still of PLOT as important glass, by is PLOT MOLECULAR ALUMINA, (SCOT)
provide Tubing internal columns Long coating thickness varies from 0.1 fast and higher for only are columns column, the on support hold more common of columns, columns are layer Porapak®. other and neon, column but including silica @ tubular

columns commercially meter 100 available. resolution have films used capillary tubular column, small solid can films thin introduction WCOT SCOT tubing. porous a or gases krypton, of PLOT (<5%) tubing however, fused oe Liquid Phase Support IN open coated

capillary millimeters are although commercially Film high Thicker are typically of types open open tubular very of columns SCOT than the the for few A steel contain sieve, fixed light separation molecular sieve small a TUBING column used; SCOT AVAILABLE SILICA of support column.

Wall-coated chromatographic columns. 0.53 meters, 50 are long analysis times. provide films capacity. and other support-coated layer layer phase. capacity with are possible disappeared. stainless columns molecular of analysis the is a on represent COLUMN of types been have NOT @ FUSED Comparison (PLOT)

88 and to 10 and Thin sample resolution The or porous adsorbed liquid sample However, films has only in PLOT alumina, the example xenon columns market. OT Many steel Fig. 6.3. tubular