Measuring device for determining the O.sub.2 content of a sample
First Claim
1. A sensor element which, when placed in contact with a sample containing oxygen, is capable of indicating the oxygen content in said sample, said sensor element comprising a carrier which is composed of a linear and amorphous polymer which is compatible with plasticizers, said polymer carrier being permeable to oxygen molecules;
- a plasticizer compound contained within said polymer carrier; and
an oxygen-sensitive fluorescent indicator substance selected from the group consisting of polycyclic aromatic molecules, homocyclic aromatic molecules and heterocyclic aromatic molecules contained within said polymer carrier, said oxygen-sensitive fluorescent indicator substance upon excitation emitting light of a certain wavelength and of varying intensity depending on the amount of oxygen from said sample in contact therewith.
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Accused Products
Abstract
In a sensor element for determining the O2 content of a sample, comprising a fluorescent indicator substance which is embedded in a polymer carrier and with which the sample may be brought into contact, a fluorescence extinction sufficiently high for yielding useful measurement results is achieved by the use of plasticizer-compatible polymers as carrier materials which contain plasticizers in addition to the indicator molecules.
101 Citations
15 Claims
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1. A sensor element which, when placed in contact with a sample containing oxygen, is capable of indicating the oxygen content in said sample, said sensor element comprising a carrier which is composed of a linear and amorphous polymer which is compatible with plasticizers, said polymer carrier being permeable to oxygen molecules;
- a plasticizer compound contained within said polymer carrier; and
an oxygen-sensitive fluorescent indicator substance selected from the group consisting of polycyclic aromatic molecules, homocyclic aromatic molecules and heterocyclic aromatic molecules contained within said polymer carrier, said oxygen-sensitive fluorescent indicator substance upon excitation emitting light of a certain wavelength and of varying intensity depending on the amount of oxygen from said sample in contact therewith. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
- a plasticizer compound contained within said polymer carrier; and
Specification