C - Chemistry – Metallurgy – 12 – Q
Patent
C - Chemistry, Metallurgy
12
Q
C12Q 1/04 (2006.01) B01D 21/26 (2006.01) C02F 1/38 (2006.01) C12N 1/02 (2006.01) C12Q 1/06 (2006.01)
Patent
CA 2361665
The present invention discloses a process for quantitative and/ or qualitative determination of the microbial contamination of suspensions, emulsions or dispersions containing minerals and/or pigments and/or fillers and/or fiber materials wherein following the addition of one or more substances which can be degraded by microorganisms, mixing and optionally subsequent incubation a sample of the suspensions, emulsions or dispersions is centrifuged to separate the microorganisms from the minerals and/or fillers and/or pigments and/or fiber materials and the number and/or size and/or type of the microorganisms is determined in the aqueous supernatant phase after one or more incubations.
L'invention concerne un procédé pour déterminer de manière quantitative et/ou qualitative la contamination microbienne de suspensions, émulsions ou dispersions contenant des minéraux et/ou des pigments et/ou des charges et/ou des matériaux fibreux. Ce procédé est caractérisé en ce qu'un échantillon des suspensions, émulsions ou dispersions, après addition d'une ou plusieurs substances organiques dégradables par des micro-organismes, est mélangé à ces dernières, puis après incubation éventuelle est centrifugé, pour séparer les micro-organismes des minéraux et/ou des pigments et/ou des charges et/ou des matériaux fibreux, et le nombre et/ou la taille et/ou la nature des micro-organismes sont déterminés dans la phase aqueuse surnageante, après une ou plusieurs incubations.
Buri Matthias
Schwarzentruber Patrick
Omya Ag
Omya Development Ag
Oyen Wiggs Green & Mutala Llp
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