Abstract: For a low-cost, high-accuracy tuning of the voltages applied to electrodes in a mass spectrometer, a chromatograph mass spectrometer (1) includes: a medium supplier (11) which supplies a medium as a mobile phase or carrier gas; a passage (15) which introduces, into the mass spectrometer, the medium supplied from the medium supplier; an ionizer (211) which ionizes the medium together with a substance coming from a member forming the passage into the medium; a measurement executer (25, 26, 43) which performs a mass separation and a measurement of a specific ion, using multiple measurement conditions which differ from each other in the value of voltage applied to at least one electrode included in one or more electrodes in the mass spectrometer; and a voltage value determiner (44) which determines the value of voltage applied to each electrode so that the intensity of the ion satisfies a predetermined criterion.

Abstract: Provided is a monomer composition containing methyl methacrylate and methyl propionate, in which the methyl propionate content is more than 200 ppm by mass and 50,000 ppm by mass or less relative to the total mass of the monomer composition.

Abstract: Provided is a monomer composition containing methyl methacrylate, and at least one compound of methyl pyruvate and methyl 2-methylbutyrate.

Abstract: A quadrupole mass spectrometer includes a quadrupole mass filter including: a main rod portion including four main rod electrodes; a pre-rod portion including four pre-rod electrodes, where, at an end opposite to the main rod portion, the four pre-rod electrodes are disposed to be aligned on an inscribed circle having the same radius centered on the ion optical axis, and, at the other end facing the main rod portion, two pre-rod electrodes facing each other across the ion optical axis and the other two pre-rod electrodes are disposed to be aligned on an inscribed circle having different radii centered on the ion optical axis; a main voltage applying unit to apply, to each main rod electrodes, a voltage created by superimposing a DC voltage and an RF voltage; and a pre-voltage applying unit to apply an RF voltage having a same frequency as the RF voltage to each pre-rod electrodes.

Abstract: A neutron detection element 100 includes: a neutron detector configured to detect a neutron and convert the neutron into an electrical signal; and an amplifier configured to amplify an output of the neutron detector. The neutron detector includes: a semiconductor layer of a first conductivity type; a detector diffusion layer of a second conductivity type in the semiconductor layer; and a neutron conversion layer on the detector diffusion layer. The neutron conversion layer converts a neutron into an ?-ray. The amplifier includes a plurality of transistors in the semiconductor layer. The neutron conversion layer is a metal film including a layer containing boron 10 or a layer containing lithium 6.

Abstract: A water-based ink jet ink composition contains Pigment Yellow 150, a dispersing resin, and N-hydroxyethylpyrrolidone.

Abstract: An aqueous ink jet ink composition contains pigment particles, inorganic oxide particles, and resin particles. The content of the inorganic oxide particles is 1.0% to 10.0% relative to the total mass of the ink composition. The ink composition satisfies the following relationship: D50 of the resin particles ?D50 of the inorganic oxide particles ?D50 of the pigment particles, wherein D50 represents the volume median diameter of the corresponding particles.

Abstract: An ink jet printing ink composition contains a pigment, colloidal silica, trimethylglycine, and water, and in which a content of the colloidal silica is lower than or equal to a content of the trimethylglycine.

Abstract: An ink jet ink composition includes: a colorant; silica particles; 1-(2-hydroxyethyl)-2-pyrrolidone; and water, and the silica particles have in a TEM image thereof, a Di (diameter of the maximum inscribed circle)/Dc (diameter of the minimum circumscribed circle) of 0.7 or more.

Abstract: An ink jet ink composition includes a self-dispersible pigment; an alcohol having 4 carbon atoms or less; an asymmetric alkyl ether; and water, a content of the alcohol with respect to a total mass of the ink jet ink composition is 0.5 to 15 percent by mass, and a content of the water with respect to the total mass of the ink jet ink composition is 10 to 40 percent by mass.

Abstract: An ink jet ink composition of the present disclosure includes a coloring material, water, an acetylene glycol-based surfactant having a HLB value of 4 or less, and 1-(2-hydroxyethyl)-2-pyrrolidone. The content of 1-(2-hydroxyethyl)-2-pyrrolidone in the ink jet ink composition is 0.5% by mass or more and 5.0% by mass or less.

Abstract: An aqueous ink jet ink composition contains a color material, water, 1-(2-hydroxyethyl)-2-pyrrolidone, and a 1,2-alkanediol. The mass ratio of the content of the 1-(2-hydroxyethyl)-2-pyrrolidone and that of the 1,2-alkanediol is 1:10 to 10:1.

Abstract: An aqueous ink-jet ink composition according to the present disclosure contains pigment, water, resin particles, 1-(2-hydroxyethyl)-2-pyrrolidone, and trimethylglycine. The mass-based content of the resin particles is lower than the mass-based content of the pigment.

Abstract: An ink set including at least one first ink composition and at least one second ink composition, wherein the first ink composition contains a pigment, an inorganic oxide colloid, and water, the second ink composition contains a dye and water, and in the ink set, an arithmetic mean of a conductivity of the at least one first ink composition at 25° C. and a conductivity of the at least one second ink composition at 25° C. is 2.5 mS/cm or less.

Abstract: An aqueous ink jet composition is provided that contains at least one dye composed of at least one of sublimation dyes or at least one of disperse dyes, polyester, and water. The polyester content is higher than or equal to 4 times and lower than or equal to 300 times the dye content. Preferably, the polyester content is 5% by mass or more and 30% by mass or less. Preferably, the dye content is 0.1% by mass or more and 7.5% by mass or less.

Abstract: A light-emitting module includes: a semiconductor light-emitting element which emits deep ultraviolet light; a liquid sealing the semiconductor light-emitting element; and a package for accommodating the semiconductor light-emitting element and the liquid. The liquid is transparent to the deep ultraviolet light. The package has a transparent member transparent to the deep ultraviolet light. For that reason, a highly reliable light-emitting module provided with the semiconductor light-emitting element that emits the deep ultraviolet light can be provided.

Abstract: An ink composition contains pigment particles, inorganic oxide particles, and a lactam solvent. The content of the inorganic oxide particles is 5.0% to 10.0% relative to the total mass of the ink composition. The ink composition satisfies the following relationship: D50 of the pigment particles×0.1?D50 of the inorganic oxide particles?D50 of the pigment particles×1.5, wherein D50 represents the volume median diameter of the corresponding particles.

Abstract: An aqueous ink jet composition includes a pigment, polyester, 1-(hydroxyalkyl)-2-pyrrolidone, an organic amine, and water, wherein the pigment, the polyester, and the 1-(hydroxyalkyl)-2-pyrrolidone have a relationship of expression (1): C?A?B, where A is the content (mass %) of the pigment with respect to the total mass, B is the content (mass %) of the polyester with respect to the total mass, and C is the content (mass %) of the 1-(hydroxyalkyl)-2-pyrrolidone with respect to the total mass.

Abstract: An aqueous ink jet composition includes a dye component composed of at least one of sublimation dyes and disperse dyes, polyester, 1-(hydroxyalkyl)-2-pyrrolidone, and water, wherein the content (mass %) of the polyester is 4.0 times or more and 300.0 times or less the content (mass %) of the dye component.

Abstract: An ink jet ink contains a pigment; an inorganic oxide colloid; a betaine; and water, and in the ink jet ink described above, a total concentration (mg/L) of potassium ions and sodium ions in the ink is 500 ppm or less.