Use of isocyanates for assaying nucleophilic functions in the form of traces in wet medium
US6534317B1 · kind B1 · utility
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Key dates
| Filing date | May 8, 2000 |
| Grant date | Mar 18, 2003 |
| Priority date | — |
| Expiry date | May 8, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/172307
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for detecting traces of pollutant in aqueous media, wherein the method includes the use of isocyanates to react on the nucleophilic functions in the form of trace amounts in a wet medium. The method for assaying nulceophilic functions in a wet medium includes the following steps: adding isocyanates to an aqueous solution of basic pH containing the nucleophilic functions to be tested; maintaining the solution for an interval ranging from a few minutes to several dozens of minutes at a temperature lower than 100° C.; and assaying the resulting carbamate, thiocarbamate or urea.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.