Ionic component sensor and method for making and using same
First Claim
1. A composite sensing element useful in sensing the concentration of an ionic component in a medium comprising:
- a first layer which includes a first matrix material which is permeable to the ionic component, and a sensing component in an amount effective to provide a signal which varies as the concentration of the ionic component in the medium varies; and
a second layer which includes a second matrix material which is permeable to the ionic component, and an opaque agent in an amount sufficient to render said second layer effectively opaque, said first layer and said second layer being covalently bonded together, said composite sensing element being formed from a composite sheet comprising said first and second covalently bonded layers, from which composite sheet a plurality of said composite sensing elements may be formed.
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Abstract
A composition of matter useful in a sensor for sensing the concentration of an ionic component in a medium is disclosed. This composition comprises a first material which includes a sensing component in an amount effective to provide a signal which varies as the concentration of the ionic component in the medium varies, and a first matrix material which is permeable to the ionic component; and a second material which includes a second matrix material which is permeable to the ionic component, and an opaque agent in an amount sufficient to render the second material effectively opaque. The first material matrix and the second matrix material are covalently bonded together. Sensing apparatus including such composition of matter and methods for making and using such composition of matter are also disclosed.
96 Citations
34 Claims
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1. A composite sensing element useful in sensing the concentration of an ionic component in a medium comprising:
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a first layer which includes a first matrix material which is permeable to the ionic component, and a sensing component in an amount effective to provide a signal which varies as the concentration of the ionic component in the medium varies; and a second layer which includes a second matrix material which is permeable to the ionic component, and an opaque agent in an amount sufficient to render said second layer effectively opaque, said first layer and said second layer being covalently bonded together, said composite sensing element being formed from a composite sheet comprising said first and second covalently bonded layers, from which composite sheet a plurality of said composite sensing elements may be formed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An apparatus useful in sensing the concentration of an ionic component in a medium comprising:
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a composite sensing element comprising a first layer which includes a first matrix material which is permeable to the ionic component and a sensing component in an amount effective to provide a signal which varies as the concentration of the ionic component in the medium varies, and a second layer which includes a second matrix material which is permeable to the ionic component and an opaque agent in an amount sufficient to render said second layer effectively opaque, said first layer and said second layer being covalently bonded together, said composite sensing element being formed from a composite sheet comprising said first and second covalently bonded layers, from which composite sheet a plurality of said composite sensing elements may be formed; and signal means capable of transmitting said signal from said sensing component. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. A method for sensing the concentration of an ionic component in a medium comprising:
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contacting said medium with a composite sensing element which comprises a first layer which includes a first matrix material which is permeable to said ionic component and a sensing component in an amount effective to provide a signal which varies as the concentration of said ionic component in said medium varies, and a second layer which includes a second matrix material which is permeable to said ionic component and an opaque agent in an amount sufficient to render said second layer effectively opaque, said first layer and said second layer being covalently bonded together, said composite sensing element being formed from a composite sheet comprising said first and second covalently bonded layers, from which composite sheet a plurality of said composite sensing elements may be formed; and analyzing said signal to determine the concentration of said ionic component in said medium. - View Dependent Claims (22, 23, 24, 25, 26, 27)
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28. A method for making a composite sensing element useful in sensing the concentration of an ionic component in a medium comprising:
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applying to a surface of a first composition of a second composition to form a composite composition, said first composition including a first matrix material precursor and said second composition including a second matrix material precursor and an opaque agent; contacting said composite composition at conditions effective to form a first matrix material in a first layer and a second matrix material containing said opaque agent in a second layer, which layers are covalently bonded together; contacting said first matrix material with a sensing component or a sensing component precursor at conditions effective to form a composite sensor sheet including said sensing component in an amount effective to provide a signal which varies as the concentration of the ionic component in the medium varies and; obtaining a plurality of said composite sensing elements from said composite sensor sheet. - View Dependent Claims (29, 30, 31, 32, 33, 34)
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Specification