The solid-phase extraction method for pretreatment of samples is used widely in various fields, including pharmaceutical, food and environmental analyses, because the method is simple and uses smaller amounts of solvents. In addition, the method has various advantages, for example, it can treat many samples simultaneously in a short time.


1. The columns can be used for solid-phase extraction by
  any of the compression and decompression methods.
  (Presep
®-C Type)
2. Some columns can be connected depending on the kind
  and amount of filler. (Presep
®-C Type)

Presep®-C
(Short)
Presep®-C
Presep®-C Type with both ends sealed
3. High flow velocity obtained by the sharp filler particle
  size distribution
4. High recovery realized by the fillers designed for solid phase
  extraction
5. High reproducibility ensured by strict quality control


Presep
® Syringe Type with one end open

List of fillers
Kind Filler Particle size(μm) Uses and characteristics
C18(ODS) C18(ODS)-bonded silica gel 63 to 212 Reversed phase partition : Separation of hydrophobic substances in water-soluble samples
Silica gel Crushed silica gel 75 to 150 Normal phase adsorption: Separation of low- to medium-polarity components from nonaqueous solutions
Silica gel types 3L, L and M 20 to 40 Use in combinatorial chemistry field and as measures for purification for organic synthesis
Alumina Basic (pH9) alumina 44 to 149 Removal of interfering substances from pesticides and environment samples
Mirabilite anhydride(Na2SO4 Sodium sulfate (anhydrous) - Dehydration
Florisil MgO3Si 75 to 150 Removal of lipid and pretreatment of pesticide residue in food
Diatomaceous earth, granular Granular diatomaceous earth 500 to 1400 Desolventization
DEA Diethylaminoethyl Cl type 45 to 90 Polymer-based weakly basic anion exchange
QA Trimethylaminoethyl C1 type Polymer-based strongly basic anion exchange
CM Carboxymethyl Na type Polymer-based weakly acidic cation exchange
S Sulfonyl propyl Na type Polymer-based strongly acidic cation exchange
RPP Styrene-divinylbenzene-methacrylate polymer 30, 60 Trapping of high-polarity substances which cannot be adsorbed by normal ODS Pretreatment of biological samples
RPP-SAX Divinylbenzne-methacrylate polymer anion-exchange group bonding 40 to 48 Selective extraction of acidic compounds and extraction of drug products and their metabolites from biological samples (urine and blood)
Agri Styrene-divinylbenzene-methacrylate polymer 50 Trapping of high-polarity substances which cannot be adsorbed by normal ODS Pretreatment for analysis of pesticide residue
DNPH Silica gel coated with 2,4-dinitrophenylhydradine short:150 to 450
Long:75 to 150
Derivatization after adsorption of aldehydes
Ozone scrubber High-purity potassium iodine - Removal of ozone
Polyamide C-200 type M Polyamide resin 75 to 150 Pretreatment of paeoniflorin in Kakkonto extract
Activated alumina DX Activated alumina - Pretreatment for analysis of dioxins
Activated carbon-blended silica gel Activated carbon-blended silica gel
Activated carbon-impregnated silica gel Activated carbon-impregnated silica gel
Multi-layer silica gel 10% silver nitrate-silica gel, 22% sulfate silica gel, etc.
Dehydration Hydrophobic Teflon membrane filter - Dehydration
NH2 Aminopropylsilanized silica gel 38 to 63 Removal of acidic compounds, such as organic acids and fatty acids
PFC/PFC-Ⅱ Divinylbenzene-methacrylate polymer 50 Pretreatment for analysis of organofluorine compounds (PFCs)




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