The present invention relates to a device and a method for qualitative and quantitative analysis of heavy metals and more particularly provides a device and a method for qualitative and quantitative analysis of heavy metals utilizing a rotary disc system.

The invention concerns a filtration assembly (1) for microbiological testing and a method of using the filtration assembly for that purpose. The filtration assembly (1) comprises a ring-like membrane support (10) holding a filtration membrane (11), a cylindrical reservoir (20) of which opposite axial ends have openings and one axial opening is removably and fluid-tightly attachable to the membrane support (10) to define a sample volume adjacent to the filtration membrane (11) on one axial side of the membrane support (10); and a drain member (30) removably and fluid tightly attachable to the membrane support (10) to define a drain channel space adjacent to the filtration membrane (11) on an opposite axial side of the membrane support (10).

A biological false bottom transport tube system includes a top section manufactured from a top section material and a bottom section below an interior floor. The top section material is transparent to both visible and infrared light, the bottom section fits within the bottom of the top section. The bottom section material is not transparent to either visible or infrared light.

A biological false bottom transport tube system includes a top section of a specimen tube body, the top section comprising a top, a semi-spherical interior floor, and a bottom below the interior floor, the top section manufactured from a material transparent to both visible and infrared light, wherein the top section may hold a sample on the interior floor; and a bottom section of the specimen tube body, the bottom section comprises a top of a diameter less than a dimeter defined by a remainder of the bottom section, the top of the bottom section fits into the bottom of the top section below the interior floor such that the top of the bottom section is secured within the bottom of the top section, the bottom section manufactured from a material that is not transparent to either visible or infrared light.

A centrifuge tube holding assembly includes a body having a front side, a back side, a top edge, a bottom edge, a first lateral edge and a second lateral edge. The top edge has a plurality of apertures extending downwardly therein and each of the apertures may be used for removably receiving an ultracentrifuge tube. The front wall has an opening therein for viewing an open space positioned below the top edge. A panel is positioned over the opening. The panel is transparent to allow viewing through the panel.

The panel has measurement indicia thereon configured to be positioned to be alignable with the ultracentrifuge tube.

A self-filling graduated cylinder system for efficiently filling a graduated cylinder with a chemical solution. The self-filling graduated cylinder system generally includes a graduated cylinder having an interior, an upper end, an upper opening in the upper end a lower end opposite of the upper end, and a check valve attached to the graduated cylinder near the lower end of the graduated cylinder. The check valve is adapted to allow a liquid chemical to flow upwardly through the check valve into the graduated cylinder and to prevent the liquid chemical within the interior of the graduated cylinder from flowing downwardly through the check valve.

A universal pipette that can serve as a standard pipette or as a capillary action pipette. A side tube emanates from a main tube in the pipette. The side tube comprises a through hole which is sealed with a through hole tab. The through hole tab can be broken off by a user, thereby removing the seal and exposing the through hole to outside of the pipette. Liquid can now easily be drawn into the tip of the pipette by virtue of capillary action which is now enabled do to the exposed through hole.

A device for handling a particle suspension, in particular a cell suspension, which includes at least one channel for flowing the particle suspension, a pumping unit configured to move a driving fluid and control element for controlling the pumping unit. Also, a method for handling a particle suspension, which includes flowing the particle suspension in or out of at least one channel using a driving fluid for driving the particle suspension in the channel.

Many hand-held diagnostics are limited in their functionality due to the challenging physics associated with small dimensional systems. An example of this is capillary forces in hydrophilic systems, such as the tight retention of liquid passing through a small pore filtration membrane, or capillary force driven microfluidics where, to keep liquid flowing the dimensions of the system become so small that the flow rates are too low to be useful, or the manufacturing of such devices becomes uneconomical. This disclosure details methods to ‘reset’ the capillary force condition to avoid the requirement of transient pressure spikes associated with the breakthrough pressure of small pore membranes, and avoid the necessity of extremely small microfluidic channels, which can be useful in applications such as filtration of whole blood to plasma using only suction pressure or passive capillary pressure.

The present disclosure relates to systems and methods for determination of analyte concentrations in solution using materials that are pre-dispensed and dried on conjugate pads or other solid substrates. The solution including the analyte can reconstitute the dried material within a vial to produce a specified concentration of material in the vial. The resulting solution can be used in lateral flow testing.