Capillary packed

GC Peti oleum gases Gasoline Packed capillary (ODS) FID... 

GC-SFC Lube oil additives Crude oil, etc. Packed capillary (diol) FID... 

SFC/HPLC (sequential) Polymers Packed capillary (Si02) UV... 

J. Cai and J. Henion, Quantitative multi-residue determination of /3-agonists in bovine urine using on-line immunoaffinity extr action-coupled column packed capillary liquid cliromatogr aphy-tandem mass spectr ometry , 7. Chromatogr. 691 357-370 (1997). 

Y. E. Shen and M. L. Lee, High-efficiency solvating gas cliromatography using packed capillaries , Awa7 Chem. 69 2541-2549 (1997). 

PACKED CAPILLARY REVERSE PHASE HIGH PERFORMANCE LIQUID CHROMATOGRAPHY-CAPILLARY ZONE ELECTROPHORESIS... 

Figure 12.23 SFC-SFC analysis, involving a rotaiy valve interface, of a standard coal tar sample (SRM 1597). Two fractions were collected from the first SFC separation (a) and then analyzed simultaneously in the second SFC system (h) cuts a and h are taken between 20.2 and 21.2 min, and 38.7 and 40.2 min, respectively. Peak identification is as follows 1, tii-phenylene 2, chrysene 3, henzo[g/ i]perylene 4, antliracene. Reprinted from Analytical Chemistry, 62, Z. Juvancz et al, Multidimensional packed capillary coupled to open tubular column supercritical fluid chromatography using a valve-switcliing interface , pp. 1384-1388, copyright 1990, with permission from the American Chemical Society.

Figure 12.24 Schematic diagram of the multidimensional packed capillary to open tubular column SFC-SFC system. Reprinted from Analytical Chemistry, 62, Z. Juvancz et al., Multidimensional packed capillary coupled to open tubular column supercritical fluid chromatography using a valve-switching interface , pp. 1384-1388, copyright 1990, with permission from the American Chemical Society.

Z. Juvancz, K. M. Payne, K. E. Markides and M. E. Eee, Multidimensional packed capillary coupled to open tubular column superaitical fluid chromatography using a valveswitching interface , Awa/. Chem. 62 1384-1388(1990). 

Five types of columns are routinely used in gas chromatography classical packed columns with internal diameters greater than 2 mm containing particles in the range 100 to 250 micrometers micropacked columns having diameters less than 1 mm with a packing density similar to classical packed columns (dp/d less than 0.3, where dp is the particle diameter and d the column diameter) packed capillary lumns have a column diameter less than 0.5 mm and a packing density less than classical packed columns (dp/d 0.2-0.3) SCOT columns (support-coated open... 

Slurry packing techniques are required for the preparation of efficient columns with rigid particles of less than 20 micrometers in diameter. The same general packing apparatus. Figure 4.8, can be used to pack columns by the balanced-density slurry, liquid slurry, or the viscous slurry techniques. Down-fill slurry packing is the method of choice for small bore columns and packed capillary columns. 

COMPARATIVE COLUMN PERFORMANCE DATA FOR SCH(B MICROPACKED AMD PACKED CAPILLARY COLUMNS... 

Semi-Packed Capillary Pacdced Capillary Semipermeable Capillary 1-100 m 0.02-0.1 0.1-2... 

Figure 5.11 Typical flow cells used for absorption detection. A, Z-cell for conventional packed coluiin applications and B, a fused silica nicroflow cell and holder used with packed capillary colusns.

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