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1. Decantation and filtration in analytical processes
Decanting and filtration are processes used to prepare samples for analysis. Depending on the case, the aim is to recover :
or the continuous phase, freed as far as possible from suspended matter (e.g. for analysis of air, water, liquid foodstuffs, etc.);
or the dispersed phase (analysis of crystal precipitates, etc.).
The two processes complement each other. Decanting is not very selective and is time-consuming, but it clarifies solutions and therefore avoids the need for filtration on overly-charged solutions. Filtration is more selective, and is designed for particles of various sizes ranging from 0.1 to 10 μm for microfiltration, and from 1 μm to 2 mm or more for filtration. However, filter clogging must be controlled in the case of...
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Decantation and filtration in analytical processes
Settling
Bibliography
Websites
A3P Services http://www.a3p.org (page consulted on March 20, 2013)
Club français des membranes (CFM) http://www.cfm-mb.fr/ (page consulted on April 03, 2013)
Directories
Suppliers – Distributors
BIORAD http://www.bio-rad.com
FIORONI http://www.filtres-fioroni.com
HYFLUX laboratory http://www.hyfluxmembranes.com
...Standards and norms
- Qualité de l'eau : dosage des matières en suspension. Méthode par filtration sur filtre en fibres de verre - NF EN 872 AFNOR - 2005
- Méthode de détermination de la porosité - ASTM F316 - 2011
- Définition de la vitesse de filtration sur filtre libre - DIN 53137 - 1967
- Teneur en cendre des filtres papiers (0,1 à 0,2 %) papier ordinaire pour analyse qualitative et moins de 0,01 % pour l'analyse quantitative...
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