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Pursuant to the Montreal Protocol on Substances that Deplete the Ozone Layer, worldwide countries continue progress toward effectively phasing out the use of all Chlorofluorocarbons. In connection with these efforts, the U.S. EPA has published
Method 1664 to replace existing Oil & Grease Method 413.1 which uses Freon-113, a Class I CFC, as the extraction solvent. New
Method 1664
employs n-Hexane as the extraction solvent instead of
Freon® and most importantly, permits use of solid phase extraction techniques.
See our new line of
Organic Standards.
Click
here to download EPA Method 1664
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| When compared to liquid/liquid extraction, CPI solid phase extraction disks for Oil & Grease are much easier to use, cut extraction time by at least two-thirds, require less than half the solvent, do not form emulsions during sample preparation, and provide equivalent or superior extraction performance: |
- Speed Extraction Time – Faster flow rates on most samples
- Save Money – Less expensive than Liquid/Liquid extraction
- Sediment Trapping Design – Patented design traps sediment while ridges allow sample to pass
- Eliminate Emulsions and Freon® – Eliminate shaking, emulsion formation, and reduce solvent usage
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| We use only the highest quality Silica... |
Nu•phase™ SPE disks are manufactured with only the highest quality bonded-phase silica. With a mean pore size of 60Å, our silica provides maximum total surface area with even bonding. Our specialized, controlled manufacturing procedures result in only nominal variances in total surface area from lot to lot.
Even Silica distribution through unique, patent pending processes...
Reproducible performance depends upon consistent and even loading of the bonded silica from disk to disk and from lot to lot. To help promote consistency in loading, we incorporate our bonded silica during production of the fiber filter media. Through this unique patent pending manufacturing technology, we are able to achieve an SPE disk with maximum loading and even phase distribution throughout the entire depth of the fiber media.
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More information on
CPI's Accu-Prep 7000™ SPE Manifold
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