Comparison of Typical Silica and Copolymer Sorbents
| Silica | Copolymer | |
| pH Stability | 2 to 12 | 1 to 14 |
| % Organic | <22%* | 100% |
| Secondary Interactions | Yes | No |
| Functionality | Aliphatic | Aromatic and aliphatic |
| Particle Shape | Irregular | Spherical |
| Pore Size | 60 Å | 80 Å |
*varies from about 6% to 22% carbon, depending on functional group attached
Bioanalytical Applications
- glucuronide metabolites
- opiates
- stimulants
- antidepressants
- antiarrhythmics
- anticonvulsants
- antibiotics
- antihypertensives
- benzodiazepines
- moderately polar, water-soluble analytes
EPA Approved Methods
- 515.2 Chlorinated Acids
- 526.1 Selected Semi-Volatile Organics
- 8041 Phenols
- 8081 Organochlorine Pesticide Leachate
- 8270 Semi-Volatile Organic Compounds – TCLP Leachate
- 8321 Phenoxyacid Herbicides – TCLP Leachate
- 8330 Nitroaromatics and Nitroamines
Nominal Sorbent Properties
| Sorbent | Poly(styrenedivinylbenzene) | ||||||
| Surface Area | 450 m2/g | ||||||
| Particle Size | 16 µm | ||||||
| Pore Size | 80 Å | ||||||
3M™ Empore™ Discs, Model 2240, 47 mm, SDB-XC, 20 per pack, 3 packs per caseShort DescriptionWe manufacture Empore™ discs to provide a large surface area for sorbent/sample contact during SPE. The cation exchange sorbent contains selectivity for cationic analytes, such as primary, secondary and tertiary amines. Fast flow rates along with high throughput may be realized with Empore solid phase extraction disks.
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