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2.5 External Gas
2.5.1 CombiFlash NextGen
Equipped with
Optional ELSD
EAR99 Technology Technology Subject to Restrictions Contained on the Cover Page
been verified at flow rates up to 200 mL/min. If using dichloro-
methane (DCM) in a warm environment, flows may be limited to
lower values. If equipped with solvent level-sensing feature
installed and enabled, the system will stop and notify the user
that the solvent bottle is empty when its remaining contents are
within the range set at T
S
L
. The level is solvent density dependent.
OLVENT
EVEL
3. Place the waste line in a suitable waste container. The
waste line assembly has a level sense line installed into the
cap. The system (if equipped with solvent level-sensing fea-
ture) will consider the waste full when the end of the sense
line is submerged below the surface of the fluid (solvent
density dependent).
4. Place the waste cap on the desired waste bottle.
5. If you use a dedicated waste container instead of a bottle,
you may not be able to implement waste level sensing as
designed. In these cases, work with your Environmental
Health and Safety group to determine how to proceed. This
may require disassembly of the supplied waste line to meet
your needs.
Note
When using higher-density solvents such as dichloromethane
(DCM), place the solvent container level with or above the
CombiFlash NextGen system. Placing solvent containers
below the level of the system can contribute to decreased flow
due to the high vapor pressure of DCM. This problem becomes
more pronounced as the ambient temperature increases.
ELSD operation requires a carrier gas. To connect the carrier gas
to the CombiFlash NextGen unit:
1
1. Locate the
/
inch O.D. FEP tubing (P/N 023-0503-02) from
8
the accessory package.
2. Push one end of the tubing into the N
on the back of the system. The tubing should be fully
seated in the port.
3. Cut the tubing to length and connect the other end to the
user-supplied carrier gas. An assortment of
ers are supplied in the accessory kit to complete the con-
nection to your gas source.
Note
Teledyne ISCO recommends >99% pure nitrogen from a
source that can deliver 2.5 SLPM at 60 to 70 psi.
CombiFlash NextGen Systems
Section 2 Preparation
> C
OOLS
ONFIGURATION
ITROGEN
1
> M
INIMUM
I
port
NLET
/
inch adapt-
8
2-5
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