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Automated sample preparation methods for the determination of trace level concentrations of environmental pollutants

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Figure

Figure 1. Coupling of the analytical process with analyzer: a) off-line, b) at-line, c) in-line, d) on-line  methods,  (S: sample, D: detector)
Figure  2.  Diagram of the flow-based  analysis system. S: sample, Rm:  reagent; V1, V2,
Figure 4. Schematic representation of automated LPME on a well plate [23].
Figure 6. Interactions between analytes and non polar bonded silica sorbents via van der Waals forces
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