Provided is a high-frequency power source UV lamp monitor capable of easily confirming lighting of a UV lamp built in a housing having a hermetically sealed structure. The monitor is attached to a high-frequency power UV lamp 20 that emits ultraviolet light by supplying high-frequency energy from a high-frequency power source 19 via a feeder, and is configured to include a detection circuit having a core member attached around the feeder in a ring shape and made of a magnetically permeable material, an induction circuit wound around the core member to extract a high-frequency induction current, and a detection element connected to the induction circuit.

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.

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.

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.

In one embodiment, determining carbon system parameters of water includes measuring the pH of a first subsample of the water using a spectrophotometer, adding nitric acid as a titrant to a second subsample of the water to obtain a titrated subsample, measuring a concentration of added nitric acid in the titrated subsample using a spectrophotometer, measuring the pH of the titrated subsample using a spectrophotometer, and calculating one or more unknown carbon system parameters using the pH of the first subsample, the pH of the titrated subsample, and the concentration of added nitric acid of the titrated subsample.

Provided are low flow groundwater fluid sampling systems and related methods of collecting fluid samples, including a low flow pump, flow cell, waste container and a communication device in communication with those components. In this manner, the low flow pump may be controlled to ensure a desired constant flow-rate is achieved, and a remote operator may monitor the status of fluid being pumped to the flow cell with the communication device, such as with a portable electronic device, including a smart phone. The system may alert the operator that fluid is ready to be collected for sampling, including at an off-site laboratory. Particularly useful applications are for monitoring groundwater quality and contamination.

The invention relates to a reactor assembly (1) for an industrial water analysis device (2), particularly using a high temperature oxidation method, the reactor assembly (1) comprises an outer reactor tube (6) and an inner reactor tube (8), the inner reactor tube (8) being removably inserted into the outer reactor tube (8). The invention further relates to an industrial water analysis device (2) comprising a housing (4) and the aforementioned reactor assembly (1), wherein the outer reactor tube (6) is fixedly mounted to the housing (4). Moreover, the invention relates to an inner reactor tube (8) for the reactor assembly (1).

This invention relates generally to a system and process for early detection of biological ammonia oxidation in water utilizing a fluorescence-based sensor and process. Various embodiments are configured to read increases in a fluorescence excitation-emission wavelength pair that is responsive to a period of time (days to weeks or even longer) prior to the onset of biological ammonia oxidation, which is considered to be a nitrification event. Fluorescence excitation/emission pairs that have proven to be reliable include a fluorescence excitation wavelength of about 230 nm and an emission wavelength of about 345 nm and an excitation wavelength of 325 and an emission wavelength of 470. The system and process enable drinking water utilities to improve management of its distribution systems and facilitate earlier corrective actions, resulting is less loss of treated water through flushing and other tangible benefits.

A device for measuring the total organic carbon content (TOC) of a sample fluid comprises a measuring cell (2) defining a volume (3) for containing a sample fluid and an excimer lamp (20) arranged to cause an oxidation reaction of the sample fluid by emitting radiation onto the sample fluid in the volume (3). A pair of electrodes is arranged to measure the conductivity of the sample fluid during the oxidation reaction and at least one temperature senor (31) is arranged on the measuring cell (2) to measure a temperature that is related to the sample fluid. The total organic carbon content (TOC) of the sample fluid is determined on the basis of the measured conductivity compensated by the temperature related to the sample fluid.

An automated total organic carbon analyzer is described. Embodiments of the system include two features, namely the development of a selective oxidation reactor to oxidize organic contaminants to their corresponding organic acids, and the measurement of the organic acids individually by chain length using an electroanalytical detector. Combining this electroanalytical approach with sequential detection capabilities (such as spectrophotometry) can expand the instrument capabilities by providing organic contaminant speciation. The described reactor performs selective oxidation of organic carbon to organic acids followed by complexation with a proprietary ligand, then selective detection using electroanalytical accumulation and desorption of organic acids performed at an electrode surface.