Method of obtaining small representative solid-phase samples

Details Method of obtaining small representative solid-phase samples Method of obtaining small representative solid-phase samples

1995-06-06

1996-11-12

Warden, Jill

Chemistry: analytical and immunological testing

Including sample preparation

436 28, 436172, 436177, 73863, 435 29, 435 39, G01N 100

Patent

active

055739547

ABSTRACT:
A method of obtaining small representative solid-phase samples from a large solid-phase sample. Solid-phase material is optionally separated from any liquid-phase that may be present and is mixed. A portion of the mixed solid-phase particulate sample is selected which provides an intermediate size representative sample. After adding liquid diluent to the intermediate particulate sample in a vessel, the suspension is agitated to promote separation of small particles as may be adhering to large particles to obtain a homogeneous suspension. Agitating is preferably carried out using a magnetic stirring bar. Fractions of this homogeneous suspension are then obtained by aspirating using a pipette and transferred to test tubes which will constitute small, truly representative solid-phase particulate samples from which replicate testing can be confidently performed.

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Bulich et al., "Measurement of Soil and Sediment Toxicity to Bioluminescent Bacteria When in Direct Contact for a Fixed Time Period", Water Environment Federation, 65th Annual Conf. & Exposition, New Orleans, LA, Sep. 20-24, 1992, pp. 52-63.

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