Abstract: It is an objet to provide an oil extraction agent that is used in an oil concentration meter, that can be manufactured at low cost, that has a high oil extraction efficiency, and whose burden on the environment is small. Trimeric or higher oligomers of chlorotrifluoroethylene are contained in the overall oil extraction agent in a range between 35% by weight or more and 100% by weight or less.

Abstract: This invention is to provide an electrode device whose manufacturing cost is suppressed and whose surface is difficult to be polluted. The electrode device comprises an internal electrode, an enclosure that houses the internal electrode, an internal solution that is housed in the enclosure and that electrically communicates a liquid junction formed in the enclosure or a response glass that forms a part or all of the enclosure with the internal electrode, and an antifouling mechanism that has a light source to irradiate ultraviolet rays on a sample contact surface of the enclosure as being a surface that makes contact with a sample and that prevents the sample contact surface of the enclosure from being polluted, and the light source is directly or indirectly mounted on an outside of the enclosure, or the light source is housed inside of the enclosure.

Abstract: It is an objet to provide an oil extraction agent that is used in an oil concentration meter, that can be manufactured at low cost, that has a high oil extraction efficiency, and whose burden on the environment is small. Trimeric or higher oligomers of chlorotrifluoroethylene are contained in the overall oil extraction agent in a range between 35% by weight or more and 100% by weight or less.

Abstract: This invention is to provide an electrode device whose manufacturing cost is suppressed and whose surface is difficult to be polluted. The electrode device comprises an internal electrode, an enclosure that houses the internal electrode, an internal solution that is housed in the enclosure and that electrically communicates a liquid junction formed in the enclosure or a response glass that forms a part or all of the enclosure with the internal electrode, and an antifouling mechanism that has a light source to irradiate ultraviolet rays on a sample contact surface of the enclosure as being a surface that makes contact with a sample and that prevents the sample contact surface of the enclosure from being polluted, and the light source is directly or indirectly mounted on an outside of the enclosure, or the light source is housed inside of the enclosure.

Abstract: The present invention is one that, without performing a complicated measuring process, makes it possible to continuously measure optically transparent particles including a biologically-derived polysaccharide having a negatively-charged functional group, such as transparent exopolymer particles (TEP), and includes: a dyeing step of adding to a sample solution a dye that binds to the negatively-charged functional group of the optically transparent particles to dye the optically transparent particles; an aggregation step of reducing the ionic strength of the sample solution to aggregate the optically transparent particles; and a turbidity measuring step of irradiating inspection light to the dyed and aggregated optically transparent particles, and detecting transmitted light caused by the optically transparent particles to measure the turbidity of the sample solution.

Abstract: A liquid characteristic analyzing apparatus may include a sensor part to bring a sensor surface into contact with the liquid and outputs an electrical signal; a transmission part to convert the electrical signal to an electromagnetic wave signal or a sound wave signal and wirelessly output the electromagnetic wave signal or the sound wave signal; a containing body that exposes the sensor surface, contains the sensor part and the transmission part, and prevents the liquid from intruding into the inside, the containing body arranged in the container and immersed in the liquid; and close contact structures to bring a passing portion for the electromagnetic wave signal or the sound wave signal into substantially close contact with an inner wall of the container. The close contact structures may include a first magnetic part that is provided in the containing body and a second magnetic part that is arranged outside the container.

Abstract: Disclosed is a liquid analysis apparatus (100), whereby wireless communication is reliably performed without having electromagnetic wave signals attenuated in a liquid, and the characteristics of the liquid can be simply and rapidly analyzed.