Agilent Technologies 1100 Series Guia do Utilizador descarregar pdf (Página 44)

38 Agilent 1100 Series Valves

4 Valve Applications

Sample enrichment and Sample stripping

Sample enrichment and sample stripping methods can be used to separate

samples from complex matrices, such as biological fluids, food extracts or

wastewater. This might be necessary to avoid interference of the matrix during

separation and detection or even damage of the column. You can use the 1100

Series 2 position/ 6 port valve (G1158A) to automate these techniques for LC

and LC/MS analysis.

Sample enrichment

Sample enrichment is used to increase the sensitivity and to remove the

sample matrix. The technique is displayed in Figure 21 on page 38. This

technique allows the injection of large volumes onto the precolumn, where the

sample matrix is separated from the analytes in order to increase sensitivity.

Figure 21 Sample enrichment (schematic setup)

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Agilent Technologies 1100 Series Guia do Utilizador Página 44