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Improvements relating to detergent analysis

A sample, fragment technique, applied in areas of improvement related to detergent analysis, to address issues such as poor reproducibility

Inactive Publication Date: 2011-06-29
UNILEVER NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] A major problem with the laboratory use of grass smears is that the results show poor reproducibility

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] The preparation of the samples is evident from the following examples. Typically, samples can be used in experiments designed to differentiate laundry detergent compositions containing different concentrations and types of enzymes so that grass stain removal can be optimized. Surfactants, polymers, metal chelating agents, and bleaching agents may also aid in grass-stain removal or decolorization and the samples of the invention also find use in testing the activity of these ingredients.

[0027] enzyme

[0028] As mentioned above, in a particularly preferred embodiment of the invention, the laundry composition tested comprises at least one enzyme. Particularly contemplated enzymes include proteases, alpha-amylases, cellulases, lipases, peroxidases / oxidases, pectate lyases and mannanases or mixtures thereof.

[0029] Suitable proteases include those of animal, vegetable or microbial origin. It is preferably of microbial origin. Chemically modified or protein engineer...

Embodiment 1

[0058] Embodiment 1: the preparation of sample

[0059] The following species were used to form "single species" samples:

[0060] Perennial Ryegrass (Lolium perenne) - perennial ryegrass (Lolium perenne)

[0061] Festuca pratensis - pasture fescue grass (high phenolic grass)

[0062] Red Clover (Red Clover)

[0063] The following species were used to form a "composite species sample" of six species comprising six different stains on the same garment.

[0064] Perennial ryegrass (Lolium perenne) (Lolium perenne) Aberglyn variety

[0065] Festuca rubra (Purple Fescue) Cezanne Variety

[0066] Agrostis (curved grass)

[0067] White Clover (White Clover) Aber Dai Variety

[0068] White Clover (White Clover) Aber Ace Variety

[0069] Taraxacum officinale (Dandelion)

[0070] All plants were grown under standard greenhouse conditions. Due to plant development in the plant life cycle, the physiological and biochemical composition of the cell wall / protoplast / etc. differs. ...

Embodiment 2

[0072] Example 2: Use of samples

[0073] Under the conditions described below, in Tergotometer TM Medium cleaning stains:

[0074] Temperature = 37°C

[0075] Time = 30 minutes

[0076] Stirring = 100rpm

[0077] Cleaning solution = 1l

[0078] Water hardness = 6°FH

[0079] Product dosage (Persil Bio / Non-) = 6.6g / l

[0080] Liquid: clothing = 40:1

[0081] Rinse = 2 x 2 minutes in 2l demineralized water (FH6)

[0082] Dry = o / n and at room temperature / in the dark

[0083] Spectral measurement: =HunterLab TM (ΔE)

[0084] The detergent used is Persil TM Bio and non-Bio powders. Using HunterLab calibrated against clean cotton and polyester fabrics before and after washing TM , to obtain the l of the grass smear * a * b and the value of ΔE.

[0085] The obtained results are listed in the table below:

[0086] Table 1

[0087] polyester

[0088] Table 2

[0089] cotton

[0090] Alfalfa

[0091] Even from these modest results...

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Abstract

A swatch of fabric having an area of from 0.25 m2 to 4*10-6 m2, said swatch being stained in one or more patches over at least 0.1 % of its surface with debris comprising chloroplast material wherein at least 80 wt% of the chloroplast material present in a patch is from a single species of green plant selected from the genera: Agropyron, Agrostis, Aradopsis, Arrhenatherum Axonopus, Belliss, Bothtriochloa, Bouteloua, Brachythecium, Chamaemelum, Dactyloctenium, Cerastium, Chrysopogon, Crepis, Cynodon Cynosurus, Dactylis, Deschampsia, Desmodium, Dichanthium, Dichondra, Digitaria, Distichlis, Elymus, Elytrigia, Eragrostis, Eremochloa, Eurhynchium, Fescue, Hilaria, Holcus, Hydrocotyle, Hypochaeris, Ischaemum, Koeleria, Leptinella, Lolium, Luzula, Microlaena, Paspalum, Pennisetum, Phleum, Phyla, Plantago, Poa, Polytrias, Pratia, Prunella, Puccinellia, Ranunculus, Rumex, Senecio, Stenotaphrum, Taraxacum, Trifolium, Trisetum Urochloa, and / or Zoysia. These swatches are of utility in the investigation of detergent compositions for use in laundry processes, particularly compositions which comprise enzymes.

Description

technical field [0001] The present invention relates to improvements relating to the analysis of detergents, and in particular to the preparation of so-called "samples" for such analysis. Background of the invention [0002] In the field of laundry detergent formulations, a "sample" is a generally soft piece of material, such as fabric with a stain applied thereto. The material may be, for example, a fabric made of cotton, polyester or various mixtures of natural and synthetic fibres. The sample can be non-woven (eg filter paper or nitrocellulose) or even a piece of hard material such as pottery. Stains can include blood, milk, ink, grass, tea, wine, spinach, gravy, chocolate, eggs, cheese, clay, paint, oil, or a mixture of these ingredients. [0003] Samples are typically used in the evaluation of laundry detergent compositions. In a traditional "model wash" analysis, since they are a small fraction of the wash load, the bulk of the load consists of "ballast", which cons...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/29C11D3/386
CPCC11D3/386
Inventor I・豪厄尔P・科特萨基斯
Owner UNILEVER NV
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