An on-line pre-concentration-optical fibre spectrofluorimetric detection procedure is described for the determination of trace amounts of Al in the µg l–1 range. The active solid phase for Al, packed into the flow cell, was the 8-hydroxyquinoline derivative Kelex 100 immobilised on Amberlite XAD-7. Different parameters were investigated with the aim of selecting the reagent solid phase, and several flow cell designs were studied. Optimisation of the operating conditions and figures of merit of the analytical system are given. The method was applied successfully to the determination of Al in dialysis fluids and concentrates.
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Dı́az-Garcı́a et al. (1990) studied this question.
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