Ph indicator device and formulation
AssigneeSmith & Nephew, Inc.
InventorsVictoria Jody Hammond, John Kenneth Hicks
Life of this patent
Estimating the term…
Abstract
Disclosed herein are devices and methods for determining the pH of fluid. Example devices include a device comprising a surface configured to contact the fluid and a pH indicator covalently bound thereto, wherein the pH indicator has a first colour prior to contact with the fluid and changes colour as a function of the pH of the fluid.
Claims31
A device for determining the pH of a fluid, the device comprising a fluid-contacting surface having a pH indicator covalently immobilised thereon, wherein the pH indicator has a first colour prior to contact with the fluid and changes colour as a function of the pH of the fluid.
A device comprising:
- (a) a fluid-contacting surface,
- (b) an opposing non-fluid contacting surface,
- (c) a pH indication zone comprising a pH indicator covalently bound therein, which indicates the pH of a fluid, wherein the colour of the pH indicator changes in response to a change in the pH of the fluid;
- and,
- (d) at least one conduit for directing fluid towards the pH indication zone.
A formulation for indicating pH of a fluid comprising a dye that includes a phenylazo compound and wherein a colour of the phenylazo compound changes in response to a change in the pH of the fluid.
A method for monitoring the pH of a fluid, the method comprising the steps of:
- (a) providing a device comprising a surface configured to contact the fluid, said surface having a pH indicator covalently immobilised thereon, wherein the pH indicator has a first colour prior to contact with the fluid and changes colour as a function of the pH of the fluid;
- (b) contacting the device with the fluid;
- and,
- (c) assessing the colour of the pH indicator.
A device comprising a fluid-contacting surface having a pH indicating means covalently immobilised thereon, wherein the pH indicating means has a first colour prior to contact with the fluid and changes colour as a function of the pH of the fluid.
A device comprising:
- (a) a pH indicating means wherein the pH indicating means has a first colour prior to contact with fluid and changes colour as a function of the pH of the fluid;
- and,
- (b) a conduit means for directing the fluid towards the pH indicating means.
Dependencies are inferred from the claim text.