Column technology for packed capillary columns

Hirata, Yukio

doi:10.1002/mcs.1220020503

Cited by 27 publications

(12 citation statements)

References 66 publications

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“…Four main categories of micro column types can be distinguished [110]: open tubular [Ill]; packed open tubular [112]; microbore and narrow micro bore [113]. The principal features of these column types are outlined in Table 6.11.…”

Section: Microcolumns In Liquid Chromatographymentioning

confidence: 99%

High performance liquid chromatography

Braithwaite

Smith

1999

Chromatographic Methods

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Section: Microcolumns In Liquid Chromatographymentioning

confidence: 99%

High performance liquid chromatography

Braithwaite

Smith

1999

Chromatographic Methods

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“…The synthesized bonded phases were packed into 150 3 0.32 mm id fused silica capillaries (Tokyo Chemical Industries, Tokyo, Japan) using a slurry method 21 with hexane as the solvent. The microcolumn LC system consisted of a microfeeder MF-2 pump (Azuma Electric, Tokyo, Japan), a Rheodyne (Cotati, CA, USA) Model 7520 injector with a 0.2 ml injection volume and a Uvidec 100-III UV detector (Jasco, Tokyo, Japan) set at 254, 273 or 320 nm.…”

Section: Chromatographic Measurementsmentioning

confidence: 99%

Separation of Polycyclic Aromatic Hydrocarbons With Various C60 Fullerene Bonded Silica Phases in Microcolumn Liquid Chromatography

Jinno¹,

Tanabe²,

Saito³

et al. 1997

Analyst

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Various chemically bonded C 60 fullerene silica phases were synthesized as stationary phases for liquid chromatography (LC) and their retention behaviors were evaluated systematically with various polycyclic aromatic hydrocarbons (PAHs) using microcolumn LC. The results clearly indicate that the C 60 bonded phases have a unique molecular recognition capability. With the C 60 bonded phases, planar PAHs having a partial structure similar to that of the C 60 molecule were retained longer than analogous PAHs molecules without the partial structure of C 60 . The results also show that the C 60 bonded phases with higher surface coverage (C-high type), i.e., 0.411 and 0.351 mmol m 22 , offered a selectivity different from that of the C 60 fullerene bonded phases with lower surface coverage (C-low type), i.e., 0.102 and 0.159 mmol m 22 for the separation of isomeric PAHs. These retention behaviors can be explained by the fit of the molecular shape of the solute molecules to the stationary phase ligands. The separation of C 60 and C 70 fullerenes was also examined with various C 60 bonded phases and the results showed that the separation factors were comparable to those with commercially available octadecylsilica (ODS) phases.

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“…Packing Stability. The stability of the packed bed is very important in SFC because pressurization and depressurization are repeated quite often [24]. From a practical point of view, a loose packing will cause instability and result in voids at the top of the column, which markedly decreases the column efficiency due to extensive rearrangement of the packing material.…”

Section: Rnin-l At 100 Atm Inletpressure) and (B) Fast Flow Rate (mentioning

confidence: 99%

Fused silica packed capillary columns in supercritical fluid chromatography

Malik

Lee

1994

J Microcolumn Separations

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Abstract. Packed capillary columns provide advantages of low flow rates, moderate sample capacities and loadabilities, short analysis times, high detectabilities, and the possibility of using a wide variety of commercially available stationary phases. This type of column is finding increasingly more applications in a variety of fields. In this paper, we report detailed studies using relatively long (0.5 to 10 m) packed capillary columns in SFC. Characteristics such as packing density and column stability are reported, as well as efficiency, resolution, and pressure drop for the different columns. It was found that densely packed capillary columns prepared using supercritical CO, as the slurry fluid are more stable and generally have better performance than conventional solvent slurry packed columns.

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Column technology for packed capillary columns

Cited by 27 publications

References 66 publications

High performance liquid chromatography

High performance liquid chromatography

Separation of Polycyclic Aromatic Hydrocarbons With Various C60 Fullerene Bonded Silica Phases in Microcolumn Liquid Chromatography

Fused silica packed capillary columns in supercritical fluid chromatography

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