Abstract: A reaction chamber assembly comprises a tapered pin having a radial chamber in which chemical or digestive reactions are to be carried out, and a collar member having a tapered bore of a taper size corresponding to that of the pin member. A closure mechanism is provided for urging the pin member into the bore so that there is a sealing engagement between the tapered surfaces of the members which acts to seal the chamber. The collar member may have a reinforcing sleeve fitted around it.

Abstract: A carrier which is used when a solution, as an analytical sample, is analyzed by X-ray fluorometry. The carrier comprises a medium having a central region with a plurality of alternate slits and support connections, each support connection defined between adjacent slits. The configuration defines an island-like portion contrasted with the surrounding region and serving to hold the analytical solution, with the presence of the slits preventing the analytical solution from permeating into the surrounding region. The island-like portion is formed with a plurality of fine through holes.

Abstract: A highly sensitive test tube according to the invention increases the sensitivity of detection of a component in a gas substantially and thus enlarges the area of use of the test tube. It possesses a reagent strip impregnated according to the gas to be detected, which strip is held by a granular fill material between holding elements. The test gas, conveyed by a pump through the test tube, from which test gas the gas to be detected is removed at the reagent strip, is continually moved through the granular fill material and thoroughly mixed, so that the actual continually decreasing concentration of the gas component is available at the reagent strip. Upon complete removal of this gas component by reaction with the reagent strip, the concentration can then be read at the reagent strip. The narrow reagent strip, which takes up the entire gas component, evidences even small admixtures.

Abstract: Effluent from an LC is passed through a thermospray nozzle which flash vaporizes substantially all of the solvent while directing any sample components as a collimated beam onto a moving tape so that the various components form spots on the tape. The tape is moved along a path that intercepts the optical path of an FTIR spectrometer whereby IR energy from the spectrometer is passed through each sample component and is then spectrally analyzed. The tape can be wound up, stored, and later used for further analysis of the spots, as desired, in the FTIR spectrometer.

Abstract: A method is provided for distinguishing between a solid surface or object treated by exposure to a reactive gas to have a measurable impermeability to a nonpolar fluid and a surface or object permeable to the fluid by the steps of:(a) contacting the surface or object being tested with a dilute solution of crystal violet for a fixed period of time,(b) separating the surface or object from contact with crystal violet solution and(c) making a visual or instrumental determination of the extent to which crystal violet has adhered to and/or penetrated into the surface or object.

Abstract: A method and apparatus for measuring the acid gravity in an inorganic acid-organic fluid system permits constant monitoring of the acid gravity thus allowing the acid strength to be maintained at an optimum level. Particularly in a system such as an alkylation reactor, where product quality is dependent upon acid strength, the acid gravity measuring method and apparatus assures high product quality. A collecting vessel receives the inorganic acid-organic fluid mixture and the acid gravitates from the organic fluid in a disengaging chamber. The acid then enters an acid-analyzing section which includes acid gravity measuring means for determining the specific gravity of the separated acid. By continuously draining the fluid from the disengaging chamber and the acid-analyzing section, fresh fluid can be continuously introduced and the acid gravity continuously analyzed.

Abstract: A test pad having a water activated reagent and a water activated peroxygen compound which undergo a chromogen reaction in an aqueous solution including hemoglobin. The reagent is potassium guaiacolsulfonate, a guaiac substitute material. The peroxygen compound is a monopersulfonate compound comprised of two moles of potassium monopersulfonate, one mole of potassium hydrogen sulfate and one mole of potassium sulfate. The test pad features a test area containing the above materials in powdered form and may also include controls for checking the results of the test. A method for using the test pad is also disclosed.