Patent · US Active

Measurement system with optical referencing

US8173439B2 · kind B2 · utility

21Cited by

6References

24Claims

0Family size

Assignee

Roche Diagnostics Operations, Inc. · US

Inventors

Wolfgang Petrich · Bad Schönborn, DE
Joachim Hoenes · Zwingenberg, DE
Uwe Kraemer · Ilvesheim, DE

Key dates

Filing date	Jun 19, 2009
Grant date	May 8, 2012
Priority date	—
Expiry date	Jun 19, 2029

Classification

Technology area (CPC G)Physics
CPC primaryG01N2021/8488
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A system is described for determining the concentration of an analyte in a liquid by absorption measurement comprising a test element with a detection area which contains at least one reaction area with reagents for detecting the analyte which cause a change in the absorption behavior upon reaction with the analyte. The detection area contains at least one reference area in which the absorption behavior is substantially not changed when wetted by a sample having the analyte. Furthermore, the system contains a detection unit for the spatially resolved detection of light intensities which are received from the detection area and an evaluation unit for evaluating signals from the detection unit. Further embodiments of the system comprise reaction areas and reference areas arranged alternately in two dimensions.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.