How are particles dispersed when using the dry method?
2022-12-02WIKI
- Samples that either dissolve or agglomerate in a wet medium or react with the medium are usually analyzed using the dry method. Samples are dispersed and transported into the measurement zone by pressurized air with the help of a Venturi device. Dispersion of the powdered sample can be achieved by the collision between the sample particles, the collision between the sample particles and the inner wall of the sample inlet tube, and the shearing force that separates sample aggregates.
- For the samples that are produced and applied in dry conditions, a measurement using the dry method avoids potential factors associated with measurement errors. The dry method is also applicable to small volume samples and valuable samples in the presence of a specific sampling system, allowing the measurement with samples of dozen of milligrams.
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