A new microdialysis unit for flow injection analysis

Summary A new dialysis unit optimized for FIA is described. It contains both a dialysis cell and a manifold for reagent addition. Both parts are included in the same module. For test purposes, a colorimetric determination of chloride — both with and without dialysis — has been carried out. For the conditions given in the experimental setup, the dialyzing efficiency was ca. 11 %. The dilution loss factor, i.e., dilution caused by the dialysis cell, was ca. 9. The dispersion coefficient (D) for the manifold — excluding the dispersion caused by dialysis — was calculated to 2.2. The analytical performance expressed as repeatability is around 1.3% r.s.d., and the sample throughput is around 80 – 90 samples/h. Potential application areas cover a wide range of possibilities, e.g., foods and feeds, dairy products, soils and plants, water and waste water analysis and fermentation products.

---

Neue Mikrodialyseeinheit für die Fließinjektionsanalyse