Page 164 - Illustrated Pocket Dictionary of Chromatography

RESERVOIR, SAMPLE 165

used to signify the reequilibration step needed after a gradient to
return the system back to its initial operating conditions.

repeatability Measured by the precision generated through the
replicate analysis of one sample by one analyst on one instrument.
reproducibility The measure of precision that is generated by
replicate analysis of one sample between analysts, instruments, and
laboratories.

reservoir A container that is used to contain and protect the sol-
vents that are drawn into the pump. Reservoirs are designed to
prevent UV light from striking and degrading the solvent, retard the
readsorption of gas in the solvent, and prevent particulates from
getting into the solvent. Reservoirs must be chemically compatible
with the solvent and should be cleaned before every use.

Three reservoirs are shown. The silver disks are sparging lines (streaming argon
or helium into the solvent to produce a continuously degassed solvent). The white
cylinders are the inlet filters, in this case made from glass.

reservoir, sample The component of a solid-phase extraction
column that is above the top frit and acts as the sample “holder”
before vacuum or pressure being applied. Larger volumes may be
attained through the attachment of empty reservoirs (say 10–30mL)
to the top of the column through an adapter.