Abstract:
To provide a water electrolysis device for the determination of stable isotopic composition of water and a water electrolysis method for stable isotopic composition of water capable of analyzing many samples with ease, with safety and at low cost in a very short time, and rapidly analyzing 17O. The water electrolysis device performing mass spectrometry of hydrogen or oxygen stable isotopic composition includes: a proton exchange membrane which is made of fluorocarbon polymer plated non-electrolytically with platinum, iridium, rhodium or iridium-rhodium alloy, and a cathode and an anode made of porous titanium plated with platinum and sandwiching the proton exchange membrane, in which water is electrolyzed by introducing it into the anode side chamber and supplying a DC current between the anode and the cathode, and oxygen gas generated at the anode and hydrogen gas generated at the cathode are respectively allowed to flow into a isotope ratio mass spectrometer. Also it is provided that a water electrolysis method for stable isotopic composition of water using the water electrolysis device.
Abstract:
A method of carrying out an accelerated light fastness test on a sample of a material to be used under certain conditions of air convection along the surface thereof, is constituted by the steps of positioning a sample to be tested with the surface thereof which is exposed to light during intended conditions of use of the material spaced at a distance from a light source having a constant intensity of light radiated therefrom for causing the surface of the sample to receive a desired intensity of light, and positioning a filter between the surface of the sample and the light source and spaced a distance from the surface of the sample for causing air between the filter and the sample to be at the convection conditions corresponding to the certain conditions of air convection at the surface of the material under its intended conditions of use, whereby the temperature conditions of the material at the surface facing the source of light are made to correspond to the temperature conditions during the intended use of the material.
Abstract:
PROBLEM TO BE SOLVED: To materialize composite cycle testing equipment provided with a solution supplying and recovering mechanism of an atomizing solution capable of preventing not only the variation of the pH and concentration of the atomizing solution used in an atomizing test but also the freezing of the atomizing solution even at a low temperature without bringing about an increase in cost and the leak of the atomizing solution.SOLUTION: The composite cycle testing equipment is characterized by providing the solution supplying and recovering mechanism which supplies the atomizing solution to the solution sump from the solution tank installed outside the test tank at the time of execution of an atomizing test for turning the atomizing solution in the solution sump installed in a test tank misty by an atomizing nozzle to bring the same into contact with an object to be tested and recovers the atomizing solution in the solution sump in the solution tank at the time of completion of the atomizing test.
Abstract:
PROBLEM TO BE SOLVED: To simplify the constitution of a mist atomizer used in an atomizing test and to enhance not only the user's convenience of the mist atomizer but also the atomizing capacity of the mist atomizer.SOLUTION: In the mist atomizer used in the atomizing test, a casing serving as the body of the mist atomizer is provided, an air passage for guiding compressed air into the casing is provided, a jet orifice is provided in the downstream end of the air passage of the casing, the liquid pipe mounted in the casing is provided so as to be directed to the jet orifice, an air flow channel is formed between the inner peripheral surface on the downstream side of the air passage and the outer peripheral surface of the liquid pipe, the liquid nozzle of the outlet region of the liquid pipe is surrounded by the air flow channel and a guide groove means for rectifying air in the air flow channel are provided in the inner peripheral surface on the downstream side of the air passage and the outer peripheral surface of the liquid pipe.
Abstract:
PROBLEM TO BE SOLVED: To obtain a gaseous corrosion testing device capable of performing a gaseous corrosion test, while performing a hygrothermal cycle test without forming dew on a wall surface of a test tank, capable of improving the gas concentration stability in the test tank and the reproducibility of test results, and capable of performing the hygrothermal cycle test under an atmosphere where gas concentration is controlled at all times. SOLUTION: The gaseous corrosion testing device is such that each set value of temperature, humidity and corrosion gas concentration, at which dew is not formed on the wall surface of the test tank, is set in at least one condition, and the hygrothermal cycle test is performed in which the tests under the set condition are repeated, at each predetermined temperature transition time once or in combination of a plurality of number of times. COPYRIGHT: (C)2011,JPO&INPIT