The 833 IC Liquid Handling Dialysis Unit is the sample preparation module for numerous demanding applications. The determination of anions in complex matrices is no longer a problem with the 833 IC Liquid Handling Dialysis Unit. Quantitative determination of anions is successful in, e.g.:
- Milk,
- Fruit juice,
- Soil eluates,
- Suspensions,
- Emulsions,
- and many more samples.
Dialysis is neither filtration, nor extraction, nor digestion. In dialysis the ions - and not the larger particles (>0.2 µm) - diffuse from the sample solution into the acceptor solution, so that a concentration equilibrium is obtained. This has the advantage that neither the sample nor the measured values are affected by a filter cake. This also means that matrix effects are largely eliminated.
The dialysis membrane has a working life of up to one week. Large particles that could block the membrane are simply transported past it whereas ions can pass unhindered through the membrane. The pore size is approx. 0.2 µm.
Calibration of the dialysis system requires no extra effort. Recovery and dialysis rates are easy to determine and, with the patented «stopped flow» method, are in excess of 98%.
The 833 IC Liquid Handling Dialysis Unit can be completely automated and is controlled by the Metrodata IC Net software.