ABSTRACT
Grab sampling is a familiar form of sample measurement. Among its advantages are lowered equipment costs and the ability to measure samples from any accessible place in the process stream. Some of the disadvantages are that more direct labor is involved, and the sample can be altered during collection and testing. Obviously, a much less complete picture of process changes can be produced in comparison to a continuous online measurement. While this is true for all forms of grab-sample data collection, the high sensitivity of particle counters makes careful consideration of these factors imperative.
