An embodiment provides a method for digesting at least one analyte of an aqueous sample, including: introducing an aqueous sample comprising at least one analyte into a digestion device comprising one or more carbon substituted material electrodes; digesting the at least one analyte by applying an electrical potential between an anode and a cathode of the digestion device, wherein the digesting comprises a step-wise disintegration; measuring the at least one analyte of the aqueous sample from the digested material, using a measurement device selected from the group consisting of: an electrochemical device and an optical measurement device; and modifying the electrical potential based upon the measurement of the at least one analyte. Other aspects are described and claimed.

An object is to increase an efficiency of removing carbon dioxide derived from inorganic carbon. An inspection apparatus includes: a column that separates a group of substances contained in an aqueous sample by size; an addition unit that adds a reagent, which acidifies the aqueous sample, into a channel; a degassing unit provided downstream of the addition unit for degassing carbon dioxide; a measurement unit that measures organic carbon contained in each substance from which the carbon dioxide has been removed; and a temperature maintaining unit that maintains a temperature of each of the column and a container in which a gas-permeable tube of the degassing unit is housed.

The present invention relates to a novel analysis device and method for obtaining the concentration of dissolved inorganic carbon (DIC) and isotopic carbon and oxygen concentration thereof, continuously from a liquid sample.

A water quality measurement device 1 includes a twin tube excimer lamp 2. The inflow pipe 3 is connected to one end of the inner tube 21 of the excimer lamp 2, and the outflow pipe 4 is connected to the other end of the inner tube 21 of the excimer lamp 2. The detector 5 that measures the conductivity of sample water is interposed in the outflow pipe 4. In the water quality measurement device 1, sample water sequentially flows through the inflow pipe 3, the inner tube 21 of the excimer lamp 2, and the outflow pipe 4. Hence, the channel in the water quality measurement device 1 can be simplified. Additionally, the sample water is oxidized by being irradiated with UV light in the inner tube 21 of the excimer lamp 2. Hence, it is possible to irradiate the sample water with UV light from the excimer lamp 2 efficiently.

Disclosed is a method for evaluating environmental erosion of thaumasite in tunnel concrete, including: acquiring natural corrosion action parameters and environmental influence action parameters, and evaluating a natural corrosion situation based on the natural corrosion action parameters to obtain an initial evaluation result; and modifying the initial evaluation result based on the environmental influence action parameters to obtain a target evaluation result.

Methods for enhanced oil recovery from subterranean formations by treating a produced water prior to injection into the subterranean hydrocarbon reservoir and manipulating produced water compositions to increase the rate and/or amount of oil that is recovered from producing wells and/or a hydrocarbon reservoir. The treatment of the produced water can increase the pH of the water from about 0.75 to about 2.0.

Measurement arrangement for determining a constituent substance or quality parameter of water by thermal decomposition in a reaction module, delivery of a reaction product to a detector, and evaluation of a detector signal for deriving a value of the constituent substance or quality parameter, wherein the reaction module is an elongated vessel having internal heating, and has a head section into which the sample is introduced, a reaction zone, as well as a foot section, from which the reaction product is output, wherein the reaction module, the heating, and means for the supply of samples and carrier gas are configured such that during the operation of the measurement arrangement an outer head temperature is T.sub.H≤80° C., and an outer foot temperature is T.sub.F≤150° C. at a maximum temperature in the reaction zone of T.sub.MAX≥1150° C.

The invention relates to an industrial water analysis device (1), in particular to an industrial TOC and/or TNb water analysis. The industrial water analysis device comprises a housing (2) with an access opening (60). The industrial water analysis device further comprises a water analysis assembly (6) that is located within the housing and comprises at least one of a heating assembly (12) and a reactor assembly (10). The reactor assembly may comprise a reactor tube (14). In order to facilitate maintenance, a mounting assembly (70) is provided according to the invention, which is attached to the housing (2) and to the water analysis assembly (6). The water analysis assembly (6) is moveable relative to the housing from an operating position (56) to a maintenance position (80), while remaining attached to the mounting assembly. In the maintenance position, at least parts of the water analysis assembly (6) are moved out of the operating position in a direction (81) pointing towards the access opening (60). In particular, part of the water analysis assembly may protrude out of the housing in the maintenance position.

A method and system of providing ultrapure water for semiconductor fabrication operations is provided. The water is treated by utilizing a free radical scavenging system. The free radical scavenging system can utilize actinic radiation with a free radical precursor compound, such as ammonium persulfate. The ultrapure water may be further treated by utilizing ion exchange media and degasification apparatus. A control system can be utilized to regulate a continuously variable intensity of the actinic radiation.

A conductivity meter includes a measurement unit including an electrode arranged as being in contact with sample water and a substrate on which a circuit that processes information outputted from the measurement unit is mounted. The measurement unit and the substrate are connected to each other, with a wall portion being interposed, the wall portion partitioning a space in a housing into a water section and an electric section. The measurement unit is arranged on a first surface of the wall portion on a side of the water section such that the electrode is located in an opening provided in the wall portion. The substrate is arranged on a second surface of the wall portion on a side of the electric section such that an electrode contact that electrically connects a power supply and a circuit to each other is located in the opening.