COMPOSITION FOR PRODUCTION OF A TEST SOIL FOR ASSESSMENT OF THE CLEANING ACTION OF CLEANING DEVICES AND USE THEREOF

Abstract

A composition may include, in dry form: (a) nigrosin; (b) wheat flour; and (c) whole egg. Such compositions may be used for production of test soil for assessment of the cleaning action of cleaning devices. Methods of producing a test soil for assessment of the cleaning action of cleaning devices for cleaning of vessels for human egesta, e.g., of washer-disinfectors, including dissolving the composition in an aqueous medium. A test soil may include the constituents of the composition in an aqueous medium, and such soils may be used for assessment of the cleaning action of cleaning devices. A method may assess the cleaning action of cleaning devices for cleaning of vessels for human egesta.

Claims

1. A composition, comprising, as constituents in dry form: (a) nigrosin; (b) wheat flour; and (c) whole egg.

2. The composition of claim 1, wherein nigrosin and whole egg are in powder form.

3. The composition of claim 1, wherein the constituents are present in the composition in the following amounts, based in each case on a volume of 250 mL of aqueous solvent to be added: the nigrosin (a) in a range of from 0.8 g to 1.2 g; the wheat flour (b) in a range of from 30 g to 40 g; and the whole egg (c) in a range of from 17 g to 21 g.

4. The composition of claim 1, further comprising: dried potato flakes.

5. The composition of claim 4, wherein the dried potato flakes are present in a range of from 35 g to 45 g, based on a volume of 250 mL of aqueous solvent to be added.

6. The composition of claim 1, in form of a portioned unit, or of units portioned in another form of packaging.

7. The composition of claim 6, wherein the package comprises a label comprising a graphic code and/or an RFID tag.

8. A method of assessing cleaning action in a cleaning device, the method comprising: producing test soil with the composition of claim 1, the test soil being used for assessment of the cleaning action of cleaning devices for cleaning urine bottles for human egesta.

9. A method of assessing cleaning action in a cleaning device, the method comprising: producing test soil with the composition of claim 4, the test soil being used for assessment of the cleaning action of cleaning devices for cleaning a bedpan for human egesta.

10. The method of claim 8, wherein the test soil is produced by dissolving the composition in an aqueous medium.

11. A method of producing a test soil for assessment of the cleaning action of cleaning devices for cleaning of vessels for human egesta, the method comprising: dissolving the composition of claim 1 in an aqueous medium.

12. The method of claim 11, wherein the aqueous medium comprises water or an aqueous buffer solution.

13. A test soil suitable for assessing cleaning action of a cleaning device configured for cleaning one or more vessels for human egesta, the soil comprising: the constituents of the composition of claim 1 in an aqueous medium.

14. A method of assessing cleaning action in a cleaning device, the method comprising: contacting the test soil of claim 13 with a urine bottle or bedpan to thereby assess cleaning action of a cleaning device configured for cleaning urine bottles or bedpans for human egesta.

15. The method of claim 14, wherein the cleaning action on the urine bottles is assessed.

16. The method of 14, wherein the cleaning action on the bedpans is assessed.

17. A method of assessing the cleaning action of a cleaning device configured for cleaning of a vessel suitable for human egesta, the method comprising: (a) producing test soil by the method of claim 11; (b) applying the test soil from the producing (a) to one or more vessels suitable for human egesta; (c) cleaning the one or more vessels from the applying (c) with a cleaning device to be assessed; and (d) assessing the cleaning action of the cleaning device from the cleaning (c) based on an amount of test soil present or removed.

18. The composition of claim 3, wherein the nigrosin is present in 1.0 g.

19. The composition of claim 3, wherein the wheat flour is present in 35 g.

Description

[0078] FIG. 1 shows a visual comparison of the test soils according to KMNE (Koller) (A) and according to the present invention (B).

DESCRIPTION OF THE WORKING EXAMPLES

[0079] The examples that follow are intended to illustrate the invention. They do not serve in any way to restrict the scope of protection.

Example 1: Test Soil for Bedpans

[0080] Test soil for the bedpan: 1.0 g of nigrosin powder (C.I.50420, water-soluble for microscopy), 35 g of type 405 wheat flour, 40 g of dried potato flakes (potato purée), 19 g of dried whole egg powder (spray-dried): Mix well, can be stored in airtight packaging for about 12 months and used. Before use, add the mixture to a pot and stir up with 250 ml of lukewarm water with an egg whisk for 2-3 min. In order to test the consistency of the mass, the loops of the egg whisk are first immersed fully into the mass and then pulled back out of the mass. If the mixture has the right consistency, it flows gradually down the loops of the egg whisk, and after 5-10 seconds the lump of mixture remaining in the egg whisk has a diameter of 40-50 mm. Sufficient as soil for 1-2 bedpans or commode pans. Apply mass to the bedpans or commode pans as instructed. After application, allow the mass to dry on for 5-7 min. This prepared mass should be used within 3-4 hours.

Example 2: Test Soil for Urine Bottles

[0081] Test soil for the urine bottle: 1.0 g of nigrosin powder (C.I.50420, water-soluble for microscopy), 35 g of type 405 wheat flour, 19 g of dried whole egg powder (spray-dried): Mix well, can be stored in airtight packaging for about 12 months and used. Before use, add the mixture to a pot and stir up with 250 ml of lukewarm water with an egg whisk for 2-3 min. Apply mass into/onto the urine bottle as instructed. After application, allow the mass to dry on for 5-7 min. This prepared mass should be used within 3-4 hours.

Example 3: Test of Cleaning Action

[0082] Test soils are produced as described in examples 1 and 2 and applied to and dried onto bedpans or urine bottles. The test specimen is thus prepared are subjected to a cleaning and disinfection method in a cleaning device in a suitable manner. Using the test soil remaining on the test specimens (before-after comparison), it is possible to assess the cleaning performance.

Example 4: Comparison of the Test Soil for Bedpans According to Koller with

[0083] Formulation for KMNE protection for testing of cleaning and disinfection (Koller):

1. Nigrosin solution Stir 6 g of nigrosin powder into 276 ml of hand-hot water.
2. Flour paste: Stir 53 g of coarse wheat flour into 369 ml of cold water and boil for about three minutes.
3. Mix the solution and the paste well and allow to cool down to room temperature (about 35°).
4. Mix three whisked fresh eggs into the mass and then stir in 100 g of potato dough flakes in small portions. 35°).

[0084] Final consistency as stool substitute: When an egg whisk is immersed—from a depth of 7 cm—a lump of diameter 4 to 5 cm should remain suspended for 5 to 10 seconds.

[0085] This mass was compared to a mass produced as described in example 1. The results are shown in FIG. 1. There is no significant difference with regard to the properties of relevance for testing.