Separation of solids from liquids by filtration and centrifugation
OwnerLea Anderson-Smith, Andrew Beckinventors
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Abstract
A method and apparatus for efficiently performing solid phase extraction techniques for cleanup of samples to be used in analysis for pesticides, food products, etc. An insert to a centrifuge tube is disclosed which provides for mixing the solid and liquid, after which centrifuging is used to separate the liquid from the solid, after processing it through an appropriate filter.
Claims20
A method comprising placing an inner vessel within an outer vessel, said inner vessel having at least one opening allowing fluid flow between said inner vessel and said outer vessel, adding solid material and liquid material to said inner vessel, shaking said inner and outer vessels simultaneously, and forcing said fluid out of said inner vessel and into said outer vessel.
Apparatus comprising an inner vessel having an inner bottom surface, said inner bottom surface including an exit canal, an outer vessel in which said inner vessel is removably maintained, and processing apparatus, said processing apparatus comprising a filter disposed against said inner bottom service, said filter being pressed against said inner bottom surface by a pillow, said pillow being held in place by a retainer.
Apparatus comprising an inner and outer vessel, said inner vessel having an outer wall extending around a dividing portion, said dividing portion being substantially perpendicular to said outer wall, said dividing portion having a large volume portion one a first side thereof, and a smaller volume portion on a second side thereof, said smaller volume portion including therewithin a pillow, a filter, and a retainer.
A method of preparing a sample comprising introducing a solid phase extraction (SPE) material into an inner vessel, introducing a fluid into the inner vessel, shaking said inner vessel, centrifuging said inner vessel, and then removing the inner vessel from an outer vessel.
Apparatus comprising an inner tube and an outer tube, the inner tube having a bottom with an opening, a filter and pillow combination being disposed against the bottom and supported by a plurality of protrusions that separate the bottom portion from the filter and pillow combination.
Dependencies are inferred from the claim text.