Column Preconcentration Systems for Graphite Furnace AAS

Cenain specific features of graphite furnace AA demand special requirements in the design and operation of the column preconcentration systems. Important differences from flame AA applications include the following [10]  

The characteristic data on the performance of column preconcentration systems for graphite furnace AAS is shown in Table 4.5 

Sequence Duration (s) Pump Medium pumped Flow-rate (ml min ) Function 

1 10 1 Air 0.8 Dispense eluate from previous elution into furnace 

2 20 1 Ethanol 0.5 Elution of residual analyte from previous elution 

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Fig. 4.11 and Table 4.4 show the manifold design and operational sequences of a FI sorbent extraction column preconcentration system for graphite furnace AAS proposed by the Author and co-workers which incorporated the considerations mentioned above... 

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