A sample cell with at least one movable lens is provided for spectrophotometric study.

An automatic extractor of capsuled oil well drilling fluid samples and a process for extracting the fluid samples, the extractor including a vertically oriented tube canister for storing a quantity of empty sample capsules; a plate canister which contains a supply of plates for storing the filled sample capsules; a pivotally mounted sampling device positioned between the tube canister and the plate canister, which sampling device operates to remove the sample capsules one by one from storage in ...

A sample applicator comprising a holder and an applicator blade of porous material formed as a rectangular plate and mounted to an end of holder, the sample applicator being arranged to apply a sample onto a film by making the applicator blade absorb the sample and, then, pushing the applicator blade onto the film.

A sample tube for obtaining a column of liquid of predetermined height in laboratory applications comprises a simple and effective construction, with a local restriction in internal diameter a predetermined distance from an inlet end and a movable valve member such as a lead shot disposed in the tube between the restriction and the opposite end, for co-operating with the restriction to retain a column of liquid at the level of the valve member and restriction by surface tension effects. In opera...

To separate each of a plurality of samples of a fluid from a body of the fluid and deposit each sample into a different one of a plurality of bottles, the downwardly extending outlet of a funnel, being offset from a vertical axis of rotation of the funnel, orbits step-by-step in a circle around the vertical axis above a distributing plate as the funnel rotates to guide fluid into each of a plurality of separated inlets in the distributing plate as the fluid is pumped from the body of the fluid t...

An applicator for applying aqueous test solutions to a hydrated gel layer for subjection to electrophoretic or chromatographic procedures is in the form of a stiff resilient non-absorbent polymeric sheet having a thickness from 3 to 125 mils and having a hydrophilic surface. The thin film of test solution picked up by the sample holder when dipped in the solution is transferred with precise control of location by pressing the edge of the applicator into the gel.

A pre-sterilizable sample bag is disclosed for receiving and storing a sample for analysis at a location remote from the situs of sample collection. The bag is fabricated of material essentially completely impermeable to bacteria and other foreign matter and includes an access opening covered by a removable closure membrane essentially completely impermeable to bacteria and other foreign matter but highly permeable, in comparison to said bag material, to sterilizing vapor. The outer surface of t...

In the preparation of a sample to be subjected to chromatographic separation and analysis, dilution of a sample of material to be analyzed is accomplished by combining a flow containing the sample material with a diluting flow. The diluted sample material thus obtained is sampled and analyzed. In one preferred embodiment spent carrier fluid from the chromatographic separation column can be used as the diluting stream.

Two conduit means having a preselected volumetric relationship one to the other are utilized in the dilution of a sample by filling one of the conduit means with a diluent liquid and the other with a sample material, then connecting the two conduit means together in a closed conduit loop and circulating the contents of the loop through the loop in order to cause uniform mixing of the sample material with the diluent liquid. In a preferred embodiment the diluted sample material is resampled from ...

Spring operated sample scales for use in grain moisture testers to measure a fixed weight of the material under test and including a hopper mounted on four parallel bars for parallel vertical movement with respect to the remainder of the tester, the hopper having automatically actuated doors on the lower wall thereof, are disclosed.