Representative Samples from Suspensions and Aerosol Clouds

5 Representative Samples from Suspensions and Aerosol Clouds 

One can often take a sample from a suspension using a pipette but in such instances one must be aware that the rate of suction can bias the results. This factor will be discussed in more detail in Chapter 4. 

To obtain samples of fineparticles constituting air pollution and other aerosol systems, many different devices have been developed for filtering the fineparticles onto 

Recently some very precise filters made from a bundle of fibres in a glass matrix has been developed by Collimated Holes Incorporated [54]. To make these filters a bundle of fiber optics is assembled in a glass matrix with the core of a fiber perpendicular to the surface of the matrix. The assembled plate is then treated with a fluid to dissolve the central core of the fibre optics which are chemically different from the glass matrix. The resultant porous surface has very accurate holes for filtration purposes. 

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