Malvern zetasizer folded capillary cell volume

In addition, the ability to measure size in the same cell before and after a zeta potential measurement enables checks to be made that ensure zeta potential measurement has not been affected by any aggregation of the sample. This is done by filling the cell with buffer, then introducing a small volume of sample into the measurement zone. The folded capillary cell is also used in the diffusion barrier technique for measuring zeta potential, where sample is separated from the electrodes in order to avoid aggregation under the influence of the applied electric field. MalvernвЂ™s folded capillary cell has all the advantages of a linear capillary cell while being completely disposable, for applications where there might otherwise be a risk of cross-contamination. Although intended primarily for the measurement of zeta potential, the disposable folded capillary cell can also be used for size measurements and is fundamental to MalvernвЂ™s patented diffusion barrier technique for the reliable, high-sensitivity measurement of the electrophoretic mobility (or zeta potential) of labile biological molecules, such as proteins in solution.Д¬onventionally, a long linear capillary cell is used when measuring zeta potential in order to separate the measurement zone from the electrodes and to provide a sufficiently long surface for the development of a smooth electro-osmotic profile. It replaces the previous model of folded capillary cell while providing the same вЂplug and playвЂ™ convenience for easy application and disposal. The new cell is designed to further enhance the reproducibility of zeta potential measurements. Malvern Instruments has introduced a new, improved disposable folded capillary cell for use in its Zetasizer Nano particle and molecular characterisation systems.

Malvern zetasizer folded capillary cell volume