Method and arrangement of measuring acidity for other chemical or physical property of a gas
First Claim
1. Method of measuring acidity or other chemical or physical property of a gas, the method comprising the following steps,arranging a membrane having optical indicator molecules bound to a microporous matrix is placed into contact with the gas to be measured, the optical indicator molecules changing their colour in response to the acidity or other chemical or physical property of the gas, anddirecting light to the membrane, whereby a part of the light is absorbed into the optical indicator molecules, and measuring the light passed through the membrane.
1 Assignment
0 Petitions
Accused Products
Abstract
A method and an arrangement of measuring acidity or other chemical or physical property of a gas. The invention comprises a membrane having optical indicator molecules bound to a microporous matrix arranged to be placed into contact with the gas to be measured, the optical indicator molecules changing their colour in response to the acidity or other chemical or physical property of the gas, a light source, and a detector. The light source is arranged to emit and direct light to the membrane, the light being transmitted through the membrane, whereby a part of the light is absorbed into the optical indicator molecules, and the rest of the light emitted is guided to the detector, where it is measured.
-
Citations
10 Claims
-
1. Method of measuring acidity or other chemical or physical property of a gas, the method comprising the following steps,
arranging a membrane having optical indicator molecules bound to a microporous matrix is placed into contact with the gas to be measured, the optical indicator molecules changing their colour in response to the acidity or other chemical or physical property of the gas, and directing light to the membrane, whereby a part of the light is absorbed into the optical indicator molecules, and measuring the light passed through the membrane.
-
4. Arrangement at measurement of acidity or other chemical or physical property of a gas, the arrangement comprising,
a membrane having optical indicator molecules bound to a microporous matrix arranged to be placed into contact with the gas to be measured, the optical indicator molecules changing their colour in response to the acidity or other chemical or physical property of the gas, a light source, and a detector, the light source being arranged to emit and direct light to the membrane, the light being transmitted through the membrane, whereby a part of the light is absorbed into the optical indicator molecules, and the rest of the light emitted is guided to the detector, where it is measured.
Specification