Grab sample

Grab sample: A sample taken at a given place and time. Compare composite sample.

Grab Sample
A single sample collected at a particular time and place that represents the composition of the water, air, or soil only at that time and place.
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grab sample A single sample collected from a volume of matter or fluid at a particular time and place which represents the composition of the sampled volume only at that time and place.

See also: Runoff, Atmosphere, Wastewater, Soil, Discharge