II-3
Matec Applied Sciences
56 Hudson St., Northborough, MA 01532 Ph: (508) 393-0155 Fax: (508) 393-5476
www.matec.com
e-mail: [email protected]
2.4 DESCRIPTION AND SPECIFICATIONS
The CHDF 2000 achieves the separation of particles using a several different fractionation cartridges.
These are illustrated below in Figure 2.1.
After the sample is injected, the flowing eluant carries a small portion of it into the top cartridge. The
particle size separation takes place in the top cartridge. This cartridge contains a coil of glass capillary
tubing as seen in Figure 2.2. This is the cartridge that needs to be replaced on occasion. The back
cartridge contains two glass capillary coils which rarely need replacement. A large proportion of the
eluant and sample flow through the back cartridge, and then to waste. Only a small portion of any injected
sample is needed to measure a fractogram.
Top Cartridge
Bottom
Cartridge
Filter
Pump, Valves,
and Plumbing
Out
In
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