Techniques for determination of haloacetic acid (“HAA”) presence in aqueous solution
US9903844B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 18, 2015 |
| Grant date | Feb 27, 2018 |
| Priority date | — |
| Expiry date | Mar 7, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/196666
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A real-time method and analytical system for determining haloacetic acids in water which operate by: (1) extracting samples on ion-exchange absorbent medium; (2) concentrating haloacetic acids on hyper-crosslinked medium; (3) eluting the analytes from the concentration medium for injection into an HPLC system; (4) separating individual haloacetic acid in reverse-phase chromatography performed by the HPLC system; and (5) measuring optical characteristics (UV-absorbance) of haloacetic acids, to determine concentration. The entire process can be performed using a completely self-contained, in-situ mechanism that sits at a water distribution point for 24/7 testing, with automated control, monitoring, reporting, and employment of remedial measures (e.g., automated adjustment of the water treatment process).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.