The counting efficiency of liquid scintillators containing toluene as the solvent for a primary solute or activator and for a secondary solute or spectrum shifter is improved, particularly in the presence of water, for example, when the isotope to be detected is an aqueous solution, by adding to the liquid scintillator a hygroscopic substance which is soluble in toluene in an amount sufficient to absorb and/or emulsify the water that is present. Such hygroscopic additive is preferably cellulosic...

For a vertically disposed liquid-liquid contact column using spaced perforated trays of the "rain deck" type, an improved tray construction that has weir means on each deck to provide a liquid coverage at each deck and, in turn, insure uniform droplet flow from all the holes through each deck, as well as curtain means on the opposing side of each tray to preclude the countercurrently flowing liquid stream from immediately sweeping droplets from the downstream face of each perforated deck and cau...

Selective extraction of cobalt from alkaline aqueous solutions of its salts with organic solutions of lower diphenylphosphinocarboxylic acids and their oxides is disclosed.

Liquid trap for use in vacuum systems where liquid flow is induced by the application of a vacuum, for the purpose of preventing accidental flow of liquid to the vacuum source. The trap incorporates a chamber connected in the vacuum line, and having an automatic drain valve closed by the application of the vacuum and opening when the vacuum is terminated, the chamber being also provided with an additional safety valve closing the vacuum line if any small quantity of liquid should escape from the...

A liquid chromatograph includes a multi piston reciprocating pump for delivering liquid at a desired flow rate to a separating column. The pistons in the pump have overlapping delivery strokes and when the pump is provided with two pistons their rate of advance is halved during the overlapping delivery periods. The instant when both pistons start delivery is dependent on solvent compressibility and the delivery pressure of the pump and thus will vary according to the operating conditions. The de...

A liquid separator for use as a blood component separator separates a blood component such as blood plasma from centrifugally separated component layers in a flexible blood bag. The blood bag has a liquid discharge tube on its upper end. The liquid separator includes a container holder for holding the blood bag with the liquid discharge tube directed substantially upwardly, and a container presser for pressing the blood bag progressively from the upper end toward a lower end thereof in coaction ...

The present invention relates to a toilet implement in which a shaft is rotated with respect to a piston member provided between the shaft and a liquid supply means whereby a cylinder is moved up and down to supply a liquid from a container body within a lower portion of the shaft into the liquid supply means. A leakage of liquid caused by the inadvertent advancement of a bottom of the container body which has been a disadvantage encountered in conventional toilet implements can be prevented.

The invention relates to an analyzer for liquids with at least one module (10) including a measuring line (14) having a reference electrode (16) and at least one measuring electrode (18). Measuring pads (48) borne by a carrier (80) can be pressed onto the measuring line; when out of contact therewith, they can be moved to and fro. The carrier may be elongated and adapted for sliding along a guiding rod (76). A spring-biased bar parallel thereto is pivotable and guides the carrier (80) as the lat...

A solvent proportioning arrangement for liquid chromatograph apparatus comprises a plurality of solvent sources connected to a proportioning valve arrangement. A control arrangement controls the proportioning valve arrangement so that each solvent is connected for an appropriate time interval to the inlet of the pump during its return (or suction) stroke. When the time interval required to proportion a given percentage of one solvent is such that it is less than a reliable operating time for the...

A device for sampling liquid and semi-liquid materials which comprises a container with a top and end cap, the container being filled through an opening in the top cat which is closed by a valve manually or electrically operated by the user. After filling, the container may be capped with permanent caps for transportation, or the container may be emptied into another container through the end cap which is fitted with a spring biased valve allowing discharge of the contents.