Agilent Technologies 1100 Series Manual de Instruções descarregar pdf (Página 44)

34 1100 Series Capillary LC System Manual

2 Optimizing Performance

Prevent Blocking of Solvent Inlet Filters

Contaminated solvents or algae growth in the solvent bottle will reduce the

lifetime of the solvent filter and will influence the performance of the capillary

pump. This is especially true for aqueous solvents or phosphate buffers (pH 4

to 7). The following suggestions will prolong lifetime of the solvent filter and

will maintain the performance of the capillary pump.

• Use sterile, if possible amber, solvent bottles to slow down algae growth.

• Filter solvents through filters or membranes that remove algae.

• Exchange solvents every two days or refilter.

• If the application permits add 0.0001 to 0.001 Molar sodium acid to the

solvent.

• Place a layer of argon on top of your solvent.

• Avoid exposure of the solvent bottles to direct sunlight.

Checking the solvent inlet filters

The solvent filters are located on the low-pressure side of the capillary pump.

A blocked filter therefore does not affect the pressure readings of the capillary

pump. The pressure readings cannot be used to check whether the filter is

blocked or not. If the solvent cabinet is placed on top of the capillary pump,

the filter condition can be checked in the following way:

Remove the solvent inlet tube from the inlet port of the solvent selection valve

or the adapter at the active inlet valve. If the filter is in good condition the

solvent will freely drip out of the solvent tube (due to hydrostatic pressure). If

the solvent filter is partly blocked only very little solvent will drip out of the

solvent tube.

WARNING

When opening capillary or tube fittings solvents may leak out. Please observe

appropriate safety procedures (for example, goggles, safety gloves and protective

clothing) as described in the material handling and safety data sheet supplied by the

solvent vendor, especially when toxic or hazardous solvents are used.

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Agilent Technologies 1100 Series Manual de Instruções Página 44