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IonPacAS9-SC 034656-06 Page 6 of 28
SECTION 3 - INSTALLATION
3.1 System Requirements
3.1.1 System Requirements for 4-mm Operation
The IonPac AS9-SC 4-mm Guard and Analytical Columns are designed to be run on the following DIONEX Ion Chromatographs
equipped with suppressed conductivity detection. Isocratic analyses at flow rates of 0.5 mL/min or greater can be performed on
a GS50/GP50/GP40/IP25, Gradient Pump Module (GPM-2) or an Advanced Gradient Pump (AGP) with standard (1/8" pistons)
pump heads. For isocratic analyses at flow rates below 0.5 mL/min and gradient analyses, a Microbore GS50/GP50/GP40 or
Advanced Gradient Pump (1/16" pistons) must be employed.
3.1.2 System Void Volume
It is important to minimize system void volume. For best performance, all of the tubing installed between the injection valve and
detector should be 0.005" (P/N 044221) ID PEEK tubing, 0.010" ID PEEK tubing (P/N 042260) or 0.012" Tefzel tubing (see,
DIONEX Product Selection Guide). Minimize the lengths of all connecting tubing and remove all unnecessary switching valves
and couplers. If you need assistance in properly configuring your system contact the nearest DIONEX Worldwide Office (see,
DIONEX Worldwide Offices).
3.2 The Sample Concentrator
The Low Pressure Trace Anion Concentrator Column (TAC-LP1, P/N 046026), the Trace Anion Concentrator Column (TAC-2,
P/N 043101), the Anion MicroConcentrator, AMC-1, (P/N 051760) or the IonPac AG9-SC 4-mm Guard Column can be used for
trace anion concentration work required in high purity water analysis. The function of the TAC-LP1, the TAC-2, the AMC-1, or
the AG14A Guard Column in these applications is to strip ions from a measured volume of a relatively clean aqueous sample
matrix. This process “concentrates” all anionic analyte species onto the TAC-LP1, TAC-2, AMC-1 or the AG14A leading to a
lowering of detection limits by 2-5 orders of magnitude. The unique advantage to the analytical chemist of the TAC-LP1, the TAC-
2, the AMC-1, or the AG9-SC in these applications is the capability of performing routine trace analyses of sample matrix ions
at µg/L levels without extensive and laborious sample pretreatment.
3.3 The Injection Loop
Table 4
Smallest Injectable Volumes (
μ
L)
Valve Type Using 0.012" ID
Tefzel Tubing Using 0.007" ID
Tefzel Tubing Using 0.010" ID
PEEK Tubing Using 0.005" ID
PEEK Tubing
DIONEX
BF2 Valve
(8 µL Internal Volume)
(10 cm Loop)
15.2 10.5 13.1 9.2
DIONEX
MicroInject Valve
(10.5 µL Internal Volume)
(14 cm Loop)
20.5 14.0 17.6 12.2
Rheodyne
Microinjection Valve
Model 9126
(0.8 µL Internal Volume)
(10 cm Loop)
8.0 3.3 5.9 2.0