Services
EST offers a wide array of services. Contact us if you have questions regarding these services.
- Dialysis of Semipermeable Membrane Device (SPMD)
- Quality Control (QC) Spiking
- PRC (Permeability Reference Compound) spiking is done to gauge the effects of turbulence, temperature and biofouling on the uptake rates of the hydrophobic compounds. Spiking can also be done during various points in the dialysis and clean up procedure to monitor the process. To date, the POCIS can not be spiked with PRC
- Gel Permeation Chromatography (GPC) cleanup
- Extraction of Polar Organic Chemical Integrative Sampler (POCIS)
- Custom quotes and estimated shipping if postal code is provided
Common Toxins found with SPMD
The compounds below are the common contaminates sampled by SPMDs. Many other hydrophobic substances with a logKow greater than 3.0 can be sequestered in triolein and ultimately analyzed.
| Acronym | Name | Possible Source |
| PAH | Polycyclic Aromatic Hydrocarbons | Combustion by-product |
| OC | Organochlorines | Pesticide |
| PCB | Polychlorinated Biphenyls | Industrial and electrical |
| Pyrethroids | Insecticide | |
| Dioxins | Combustion, industrial | |
| Furans | Industrial by-product | |
| Nonyl Phenols | Industrial | |
| Alkylated Selenide | Fossil fuels | |
| PBDE | Polybrominated Diphenyl Ethers | Polybrominated Diphenyl Ethers |
Common contaminates found with POCIS
| Compound Class | Example |
| Analgesics | Ibuprofen |
| Antibiotics | Oxytetracycline |
| Anti-Convulsants | Ethotoin Mephenytoin |
| Anti-Depressants | Phenelzine |
| Decongestants | Ephedrine acetate |
| Fragrances | Galaxolide (HHCB) and Tonalide (AHTN) |
| Herbicides | Atrazine |
| Hormones | 17 α-ethynyestradiol Estrogen |
| Stimulants | Caffeine |
| Sulfa drugs | Sulfadiazine Sulfamerizine |
| Surfactants | Nonyl-phenol |
| Vitamins | Nicotinic Acid |
| Illicit drugs | Methamphetamine |
Have Questions?
Go to our Frequently Asked Question page. We already have answers for many of your questions.