Chemical sensor
First Claim
1. A method of assay of a liquid sample of a bodily fluid to determine presence or content of N-acylated primary aromatic amine, comprising:
- (a) contacting said sample with an enzyme capable of catalysing the hydrolysis of N-acylated primary aromatic amine to form an enzyme/amine system comprising said enzyme and said N-acylated primary amine;
(b) contacting said enzyme/amine system with an electrode;
(c) poising said electrode at a potential responsive to direct non-mediated transfer of charge from the system to the electrode, and(d) detecting or measuring the current flow as an indication of presence of amount of N-acylated primary aromatic amine in the system.
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Accused Products
Abstract
The present invention is concerned with a chemical sensor, more specifically with a chemical sensor which is capable of detecting the presence of, measuring a quantity of or monitoring the level of N-acetyl primary aromatic amines, such as paracetamol, in whole blood.
The specification relates to a method of assay of the type in which an electrode poised at a suitable potential is contacted with a system comprising;
(a) a sample suspected to contain paracetamol or a derivative thereof, and
(b) an enzyme capable of catalyzing the hydrolysis of an N-acylated primary aromatic amine or a derivative thereof, and,
wherein the current flowing in the electrode is a measure of the quantity of hydrolysis products formed and thereby of the concentration of N-acylated primary aromatic amine or derivatives thereof in the sample.
150 Citations
10 Claims
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1. A method of assay of a liquid sample of a bodily fluid to determine presence or content of N-acylated primary aromatic amine, comprising:
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(a) contacting said sample with an enzyme capable of catalysing the hydrolysis of N-acylated primary aromatic amine to form an enzyme/amine system comprising said enzyme and said N-acylated primary amine; (b) contacting said enzyme/amine system with an electrode; (c) poising said electrode at a potential responsive to direct non-mediated transfer of charge from the system to the electrode, and (d) detecting or measuring the current flow as an indication of presence of amount of N-acylated primary aromatic amine in the system. - View Dependent Claims (2, 3, 4, 5)
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6. A sensor electrode comprising:
- (a) a substrate material;
(b) an enzyme capable of catalysing the hydrolysis of paracetamol, said enzyme being located at least on the surface of said substrate; and
, (c) means to maintain said electrode at a poised potential, said electrode being free from electron-transfer mediator compounds, whereby charge is directly transferred to the electrode material, without presence of a mediator compound, when the electrode at said potential is contacted with a liquid sample containing paracetamol. - View Dependent Claims (7, 8, 9, 10)
- (a) a substrate material;
Specification