INSTALLATION CAUTION The SPE Processor does not include a filter on the source gas input. A clean, oil-free gas source is essential to prevent sample contamination. Compressed nitrogen is the recommended pressure source in order to assure inert atmosphere operation. If this is not a consideration, the unit can operate using high purity filtered instrument air.
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SPE RACK CONFIGURATIONS and USE The System 48-II Pressure Processor provides the means to batch process solid phase extraction columns in the 48-position format. The CEREX column racks interface to several collection tube racks which are also in the 48-position format. Depending upon the volume of the effluent, the appropriate collection rack can be selected from the ancillary products available with the Pressure Processor.
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COLUMN COMPRESSION and DECOMPRESSION The Processor is designed to accept up to 48 columns installed in the column rack. Because of the unique manifold design, each column will be pressurized to the same level even if columns are omitted. Refer to “Manifold Operation” in the following section.
MANIFOLD OPERATION Each of the 48 holes in the Processor manifold are restricted in order to maintain the manifold pressure even if all of the positions are not filled by columns. In addition there are valves located on top of the manifold that shut off individual rows of 12.
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EXTRACTION FLOW ADJUSTMENT The System 48-II Pressure Processor has a two-level gas delivery system used to pressurize the SPE columns. One part of the system is controlled by the rotameter located on the left side of the instrument panel. By switching the “SPE FLOW RATE” selector to the left, “ADJUST FLOW”...
MAINTENANCE The System 48 Pressure Processor is a rugged unit constructed of anodized aluminum, stainless steel and solvent resistant plastics. However, the following items should be observed during operation: 1. Solvent spillage or overflow should be cleaned immediately in order to prevent instrument damage.
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HEATED MANIFOLD OPTION The Manifold Heater option provides heated gas flow through the sorbent bed and assists in removing residual moisture. This in turn not only yields higher analyte recovery, It also allows the sorbent bed to be eluted with a more selective solvent like hexane or ethyl acetate.
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