Method for detecting adsorption performance of microplastics for heavy metals using low-field NMR relaxation method
US11971375B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Oct 19, 2023 |
| Grant date | Apr 30, 2024 |
| Priority date | — |
| Expiry date | Oct 19, 2043 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A90/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for detecting adsorption performance of microplastics for heavy metals using low-field NMR relaxation method, including: establishing a reference line reflecting a relationship between a target heavy metal ion concentration and a transverse relaxation time; conducting a heavy metal adsorption experiment on microplastics and obtaining samples at different time points; detecting transverse relaxation times of the multiple samples obtained; determining a heavy metal ion concentration of each sample based on the reference line of the target heavy metal ion concentration and the transverse relaxation time; analyzing data and implementing a model fitting process. The method according to the present disclosure does not require cumbersome and complicated sample pre-processing, it can be measured immediately after sampling, it is simple, fast and low-cost, the method has a wide detection limit, the detection is faster, non-destructive testing can be achieved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.