Specifications

Operation The following list shows the step-by-step procedure for
carrying out concentration by evaporation with the setup shown above.
1. Set up the Quest and GRCM as shown in Figure 9
2. Connect the Solvent Trap Manifold to a solvent trap.
3. Turn each of the two Quest Control valves to CLOSED.
4. Turn the Gas Selection valve on the GRCM Control Box to Gas 1 (Nitrogen).
5. Slowly turn the Out A needle valve counterclockwise approximately % turn
to deliver nitrogen.
/7\ Caution
Excessive opening of the Out A needle valve at this time may
cause the liquids in the
RV to "bump" (bubble excessively).
6. Carefully open the Quest Lower Manifold.
7. Slowly turn the Out A needle valve counterclockwise to adjust the gas flow.
To achieve fastest evaporation rates, maximize the gas flow without
allowing the liquid to bubble over. As the liquid level decreases, the gas
flow can be readjusted to maintain maximum evaporation rates.
8. If necessary, apply mild heating (approx. 213 of boiling point) for efficient
evaporation.
9. When the solvent is evaporated, close the Lower Manifold drain levers on
the Quest reactor.
10. Close the Out
A needle valve by turning it clockwise until it stops.
11. Remove the Solvent Trap and Gas Delivery Manifolds from the Quest
reactor.
12. Clean the apparatus as decribed in the section "Cleaning the GRCM"
below.
GRCM - User Manual
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