Disinfection and cleaning confirmation system

• US 9,170,205 B2
• Filed: 09/18/2013
• Issued: 10/27/2015
• Est. Priority Date: 09/18/2013
• Status: Active Grant

• Current Assignee: Metrex Research, LLC (Envista Holdings Corporation)
• Original Assignee: Metrex Research, LLC (Envista Holdings Corporation)
• Inventors: Burns, Steven Joseph, Som, Abhigyan, Tulpinski, Walter Joseph
• Primary Examiner(s): Soderquist, Arlen
• Application Number:
  US14/030,940
• Publication Number:
  US 20150079690A1
• Time in Patent Office: 769 Days
• Field of Search: 422/430, 436111-112, 436/166, 436/169, 436/179
• US Class Current: 1/1
• CPC Class Codes: A61L 2/28 Devices for testing the effectiveness or completeness of sterilisation, e.g. indicators which change colour apparatus involving enzymes or microorganisms C12M1/34; methods involving enzymes or microorganisms C12Q1/00
• CPC Class Codes: G01N 21/78 producing a change of colour
• CPC Class Codes: Y10T 436/174614 Tertiary amine

Abstract

An indicator kit for detecting the presence of a quaternary ammonium compound disinfectant is provided. The kit includes an indicator composition that includes an azo dye material and water; an extraction composition that includes water, and at least one of a C1-C7 alcohol or a glycol ether; and an acidic compound present in at least one of the indicator composition, the extraction composition, or an acidic developer solution packaged separately from the indicator composition and the extraction composition. A method of detecting a quaternary ammonium compound disinfectant on a surface is also provided.

Claims

1. An indicator kit for detecting the presence of a quaternary ammonium compound disinfectant, comprising:

an indicator composition comprising azo dye material and water;

an extraction composition comprising water, and at least one of a C1-C7 alcohol or a glycol ether; and

an acidic compound present in at least one of the indicator composition, the extraction composition, or an acid developer solution packaged separately from the indicator composition and the extraction composition.

2. The kit of claim 1, wherein the azo dye material comprises an azo compound selected from the group consisting of methyl orange, ethyl orange, propyl orange, butyl orange, and combinations thereof.

3. The kit of claim 1, wherein the azo dye material comprises ethyl orange.

4. The kit of claim 1, wherein the extraction composition includes the C1-C7 alcohol selected from methanol, ethanol, propanol, isopropanol, butanol, or combinations thereof.

5. The kit of claim 1, wherein the extraction composition includes the glycol ether selected from 2-methoxyethanol, 2-ethoxyethanol, 2-propoxyethanol, 2-isopropoxyethanol, 2-butoxyethanol, 2-phenoxyethanol, 2-benzyloxyethanol, 2-(2-methoxyethoxyl)ethanol, 2-(2-ethoxyethoxyl)ethanol, 2-(2-butoxyethoxyl)ethanol, or combinations thereof.

6. The kit of claim 5, wherein the glycol ether comprises 2-butoxyethanol.

7. The kit of claim 1, wherein the acidic compound is selected from the group consisting of a carboxylic acid, a phosphoric acid, a sulfonic acid, a mineral acid, and combinations thereof.

8. The kit of claim 1, wherein the extraction composition includes the C1-C7 alcohol and the glycol ether.

9. The kit of claim 1, further comprising:

a swabbing device comprising a support material, wherein at least one of the indicator composition or the extraction composition are absorbed thereon.

10. The kit of claim 9, wherein the support material comprises papers, fibers, fabrics, non-woven fiber mats, felts, porous membranes, porous ceramics, porous hydrophilic plastics, porous sponges, hygroscopic gels, hygroscopic polymers, porous or hygroscopic natural materials, or a combination thereof.

11. The kit of claim 9, wherein the indicator composition is applied to the support material using immersion, spraying, flexographic coating, gravure coating, screen coating, die coating, or a combination of two or more thereof.

12. A method for detecting a presence of a quaternary ammonium compound disinfectant on a surface, the method comprising:

obtaining a sample from the surface;

contacting the sample with an indicator composition comprising an azo dye material, water, and optionally a first acidic compound; and

visually observing whether a color change result occurs within the indicator composition thereby indicating the existence or the absence of the quaternary ammonium compound disinfectant on the surface.

13. The method of claim 12, wherein the azo dye material comprises an azo compound selected from the group consisting of methyl orange, ethyl orange, propyl orange, butyl orange, and combinations thereof.

14. The method of claim 12, wherein obtaining the sample from the surface comprises:

swabbing a portion of the surface with a device comprising a support material, wherein the indicator composition is absorbed on the support material, or wherein an extraction composition comprising water, at least one of a C1-C7 alcohol or a glycol ether, and optionally a second acidic compound, is absorbed on the support material.

15. The method of claim 14, wherein the extraction composition includes the C1-C7 alcohol and the glycol ether.

16. The method of claim 14, wherein the extraction composition is absorbed on the support material.

17. The method of claim 14, wherein contacting the sample with the indicator composition comprises applying a solution of the indicator composition to the device.

18. The method of claim 12, further comprising:

wiping the surface with a material that is void of any quaternary ammonium compound disinfectant prior to obtaining the sample from the surface, wherein an absence of the color change result within the indicator composition indicates that the surface was not treated with the quaternary ammonium compound disinfectant after the wiping the surface with the material that is void of any quaternary ammonium compound disinfectant.

19. The method of claim 18, wherein the material that is void of any quaternary ammonium compound disinfectant comprises an acid, a metal ion, an oxidant, an alcohol, a ketone, a glycol ether, an aldehyde, a biguanide, a phenol, a iodophor, a chelant, or combinations thereof.

20. The method of claim 12, further comprising:

wiping the surface with a quaternary ammonium compound disinfectant prior to obtaining the sample from the surface, wherein an absence of the color change result within the indicator composition indicates that the surface was cleaned with a material void of any quaternary ammonium compound disinfectant after the wiping the surface with the quaternary ammonium compound disinfectant.