Method and apparatus for isolation of trace materials from a het

Details Method and apparatus for isolation of trace materials from a het Method and apparatus for isolation of trace materials from a het

1999-03-11

2000-12-26

Lithgow, Thomas M.

Classifying, separating, and assorting solids

Fluid suspension

Liquid

209168, 209170, 209158, 209159, 209173, 209454, B03B 562, B03D 114, B03D 124

Patent

active

061644560

ABSTRACT:
An elutriation apparatus which combines pressurized liquid nozzles (16A) and the low energy air nozzles (20) producing bubbles for flotation and separation of trace materials in a heterogeneous mixture of materials is described. Quantitative separation of trace evidence is achieved by the apparatus by a closed system of mechanical separations using the water and the air to isolate and deposit trace evidence on a fine mesh screen filter (17) submerged in the water (24) in a container (23). The method provides a rapid, quantitative and inexpensive method for detection of the evidence in soil samples.

REFERENCES:
patent: 3298519 (1967-01-01), Hollingsworth
patent: 4478710 (1984-10-01), Smucker et al.
patent: 4822493 (1989-04-01), Barbery et al.
patent: 5191982 (1993-03-01), Tong
patent: 5305888 (1994-04-01), Meylor et al.
patent: 5307937 (1994-05-01), Hutwelker
patent: 5436384 (1995-07-01), Grant et al.
patent: 5458738 (1995-10-01), Chamblee et al.
Smucker, A.J.M., Soil Environmental modifications of root dynamics and measurement. Annual Review of Phytopathology 31:191-216 (1993).
Smucker, A.J.M., et al., Agronomy Journal 74:500-503 (1982).

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