IonPacAS9-SC
034656-06
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4.8
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 AG9-SC 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 AG9-SC leading to a
lowering of detection limits by 2-5 orders of magnitude.
The concentrator column is used in lieu of the sample loop. Pump the sample onto the concentrator column in the
OPPOSITE
direction of the eluent flow. When using concentration techniques, do not overload the concentrator column by concentrating an
excessive amount of sample. Concentrating an excessive amount of sample can result in inaccurate results being obtained. It is
possible during the concentration step for the polyvalent anions such as phosphate and sulfate to elute the weakly retained anions
such as fluoride and acetate off the concentrator column.
For a detailed discussion of anion concentration techniques, refer to Section 3, Operation, of the Trace Anion Concentrator (TAC-
2) Column
Product Manual (Document No. 034467). For further information on the AMC-1 (P/N 051760) see, Product Manual
for AMC-1 Anion MicroConcentrator Column, Document No. 031262.
