Empore™ Solid Phase Extraction Cartridges are designed for sample pretreatment to remove or minimize sample matrix and other interferences to "cleanup" a sample prior to analysis. This procedure can also concentrate an analyte to achieve the desired sensitivity range of an analytical method. Compounds are isolated from complex mixtures by proper selection of a variety of sorbent chemistries.
The cartridge is molded from a polypropylene resin. An Empore extraction disk is secured in place at the bottom of each cartridge with a sealing ring. A proprietary prefilter is placed above the Empore disk. This prefilter aids in preventing particulates and macromolecules from reaching the underlying membrane and improves the flow of biological samples, such as serum and plasma, through the cartridge.
The prefilter is composed of polypropylene microfiber layers of graded densities. Three different densities are used, with the coarsest one on top and the finest at the bottom. The top two microfiber layers are individual layers of material. The third microfiber layer, having the smallest effective pore size, is on the bottom of the prefilter and contains five individual layers of material. A porous polypropylene support membrane comprises the final layer.

Product Characteristics

The Empore™ SPE cartridges are available in 1 ml, 3 ml and 6 ml volumes. The effective SPE membrane diameters are specified as 4, 7 and 10 mm, respectively.

Product Selection

Empore™ extraction disks are available in a variety of sorbent chemistries to compliment most analytical applications :

C8-SD (Standard Density) 4 mm /1 ml 
C8-SD (Standard Density) 7 mm /3 ml 
C8-HD (High Density) 4 mm /1 ml 
C18-SD (Standard Density) 4 mm /1 ml 
C18-SD (Standard Density) 7 mm /3 ml 
C18-SD (Standard Density) 10 mm /6 ml 
SDB-XC (High Density - [Poly-styrenedivinylbenzene]) 10 mm /6 ml 
UR-SD (Standard Density - Universal Resin) 7 mm /3 ml