Analyzing method and analyzing apparatus for urea
US11860075B2 · kind B2 · utility
1Cited by
8References
14Claims
0Family size
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Key dates
| Filing date | Oct 30, 2018 |
| Grant date | Jan 2, 2024 |
| Priority date | — |
| Expiry date | Aug 18, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2001/4016
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The analyzing method for quantifying urea in a sample solution includes: a pretreatment step of pretreating the sample solution with at least one of a membrane device including a reverse osmosis membrane and an ion exchange device including an ion exchanger; and an analyzing step of analyzing a target substance in the pretreated sample solution. The analyzing step is based on, for example, flow injection analysis (FIA), and includes a step of quantifying the target substance by measuring the absorbance of a liquid containing a substance generated by reacting the target substance with a reagent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.