Stable turbidity calibration standards
US7843560B2 · kind B2 · utility
4Cited by
7References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 21, 2008 |
| Grant date | Nov 30, 2010 |
| Priority date | — |
| Expiry date | Jun 29, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/4785
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention relates to a turbidity calibration standard comprising: a number of from 1 to 5 sequentially-interfaced layers, wherein each layer independently comprises a light-permeable polymer or light-permeable interpolymer; a measured light transmission modulating amount of at least one light transmission modulator, which is distributed in any one or more of the layers; and a light-permeable container, which contains the layers and the at least one light transmission modulator. Also, the invention relates to methods of making and using the standard, and kits comprising the standard.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.