Methods and devices for obtaining approximate property data from the aqueous liquid phase of a multiphase fluid produced from a well. The method includes introducing a discrete sample of the multiphase fluid to a separation vessel; mixing a demulsifier with the discrete sample of the multiphase fluid; allowing the multiphase fluid to separate into separate liquid phases; drawing a measured sample of the aqueous liquid phase from the separation vessel, and diluting it with a measured amount of fresh water; analyzing the diluted aqueous liquid phase sample in a water analysis unit to measure a property of the diluted aqueous liquid phase sample and obtain diluted aqueous liquid phase sample data; and calculating the approximate aqueous liquid phase property data using the diluted aqueous liquid phase sample data and accounting for the amount of fresh water used to dilute the measured sample of the aqueous liquid phase.

The invention is directed towards methods and compositions for identifying the specific microorganisms present in a particular potion of a water process system. The method involves obtaining a sample from the process and determining if a problematic organism exceeds an acceptable threshold. If so a remedial bio-control procedure can be applied long before any unwanted defects or problems occur.

A photometric method for determination of a concentration of a film forming amine in a liquid, including providing a buffer solution of a weak acid having a pKa≥4.5 and a strong acid having a pKa≤1; diluting an aliquot of the buffer solution with water, and determining the pH of the diluted buffer solution; adding reagent to the diluted buffer solution and measuring an initial absorbance of the diluted buffer/reagent solution; preparing a sample solution by adding liquid containing the film forming amine to an aliquot of the buffer solution and measuring the pH of the sample solution; adjusting the pH of the sample solution to match the pH of the diluted buffer solution by adding strong acid; and adding the reagent to the pH adjusted sample solution to form a colored complex, and measuring the absorbance of the resulting solution in a photometer.

A water quality sampler includes a membrane receptacle and at least 7 sample membranes. The membrane receptacle comprises at least 7 membrane cavities disposed on a top surface of the membrane receptacle. Each membrane cavity is configured to hold a sample membrane and the sample membranes are each removably positioned within the membrane cavities and extend at least 1 cm out from the top surface of the membrane receptacle. A bottom of the membrane receptacle comprises a protruding lip that traces a bottom edge of the membrane receptacle in a downward direction, where the protruding lip encompasses a stacking chamber capable of receiving a top end of a second water quality sampler to allow stacking of multiple water quality samplers.

Method and compositions using transition metal salts and/or ammonium chloride to liberate toxins and other molecules from cyanobacteria, useful for assaying for total cyanobacterial toxins in lakes, reservoirs and other waters.

A system and method for controlling microbiological growth in a water system and premise plumbing system which uses stabilized hydrogen peroxide as a disinfectant and maintains water energy matrix control. Maintenance of stable hydrogen peroxide residual in the system in combination with active temperature monitoring enables better control of the water energy matrix and reduction of hot water temperature while maintaining microbiological control.

Provided is a water examination device including: a main body; a fluid accommodation unit formed in the main body; a wave source for irradiating waves toward the fluid accommodation unit; a detector for detecting a laser speckle at every set time period that is set in advance, the laser speckle being generated due to multiple scattering of the waves in the fluid; a controller for estimating existence of impurities in the fluid in real-time by using the detected laser speckle; and a calibration unit for controlling the wave source or the detector such that an intensity of light irradiated from the wave source and measured by the detector is within a certain range set in advance.

Yttria containing hybrid organic-inorganic sol-gels may be used in coatings for capillary microextraction, optionally hyphenated to online HPLC analysis. The sol-gel reaction mixture can use an yttrium trialkoxyalkoxide, such as yttrium trimethoxyethoxide, and a [bis(hydroxyalkyl)-amino-alkyl]-terminated polydialkyl/arylsiloxane, such as [bis(hydroxyethyl)-amine] (BHEA)-terminated polydimethylsiloxane, that can undergo hydrolysis and polycondensation, to form coating materials. Capillaries coated with such sol-gels can have improved extraction efficiency compared, e.g., to pure yttria-based coatings. The CME-HPLC can analyze water samples containing analytes of varied polarity, with excellent extraction of amides, phenols, alcohols, ketones, aldehydes, and polyaromatic hydrocarbons and detection limits ranging from 0.18 to 7.35 ng/mL (S/N=3). Such capillaries can exhibit solvent stability at pH 0 to 14, RSD % between 0.6 to 6.8% (n=3), at a preparative reproducibility RSD between 4.1 and 9.9%.

A container cap liner that that facilitates the storage of gases and various volatile organic compounds (VOCs). More particularly, the container cap liner reduces the loss of gases and various volatile compounds thereby providing for relatively longer storage periods with relatively more accurate analytical analysis.

A pool maintenance system that includes a spectroscopic device that is configured to analyze a fluid of a pool.