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YMC-Pack PVA-Sil Analytical Guard Columns

Normal-Phase Alternative to Silica

YMC-Pack PVA-Sil, which possesses a polyvinyl alcohol (PVA) surface chemistry, is an excellent alternative to silica gel or other polar bonded phases which are used in normal-phase chromatography.  In many situations, it exhibits better performance characteristics with a unique selectivity, and can often resolve compounds that behave poorly on bare silica.  The alcohol functionality present on PVA-Sil is better suited for troublesome compounds, such as organic bases, that acidic silanols present in unbonded silica.  Since PVA-Sil is a bonded stationary phase, it can be washed with solvents of any polarity from hexane to water, without altering the surface activity.  Therefore; selectivity, retention, and resolution are reproducible regardless of the column’s previous history.  This is not true of bare silica, which easily becomes completely deactivated following the introduction of even a small quantity of water.

Guard Cartridges

Analytical Guard Cartridges: Features & Benefits

analytical-guard-columnsYMC’s Guard Column Cartridge Systems for HPLC accept cartridges of 1.0, 2.1, 3.0, or 4.0mm inner diameters – in either 10mm or 20mm lengths.  Cartridges are available with a comprehensive selection including all stationary phase chemistries offered by YMC, ensuring compatibility between the guard column and the analytical column.  Assembly is tool-free, simplifying cartridge replacement.

YMC Guard Column Cartridges require the use of a holder, P/N: XPGCHP1 for 10mm length and P/N: XPGCHP2 for 20mm length.

Please select the desired particle size to view a list of products.


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Guard Columns

Analytical Guard Columns: Features & Benefits

YMC’s Guard Columns for HPLC are available in 4.0mm and 5.0mm diameters and come in 10mm lengths.  These guard columns are available with a comprehensive stationary phase selection offered by YMC, ensuring compatibility between the guard column and the analytical column.  Unlike our guard cartridge columns, these guard columns do not require a holder, but do require a small jumper made from either stainless steel or PEEK tubing in order to connect them to the inlet of the analytical column.

(No holder required)

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