Friday, March 30, 2012

QuICK QuEChERS

UCT’s QuICK QuEChERS cartridge ECPURMPSMC offers a fast and efficient method for QuEChERS extract clean-up. Processing is simple and saves the need for any shaking or centrifugation steps. To use, a disposable syringe in loaded with supernatant and a QuICK QuEChERS cartridge is fitted on the end using the Luer tip. The supernatant is pushed through the cartridge directly into a sample vial; the sample is now ready for GC or LC analysis. The QuICK QuEChERS cartridge significantly reduces handling while increasing laboratory through-put. Each UCT QuICK QuEChERS cartridge contains 110 mg anhydrous MgSO4 and 180 mg of PSA.

In comparative studies with traditional dispersive SPE, QuICK QuEChERS showed excellent recovery and RSD. Click to see results.

Tuesday, March 20, 2012

Five facts about UCT solid phase extraction

1. UCT is a leading supplier of SPE products for more than 25 years. We have never had a need to resort to false marketing gimmicks because we are always focused producing high quality sample extracts for the bench side analysts.

2. UCT SPE columns are packed into medical grade polypropylene, so analysts will not see organic leachates such as BPA, phthalates, or other persistent organic pollutants.

3. UCT SPE products don't suffer the effects of channeling because we patented the ribbing at the base of the SPE column which ensures the best flow dynamics for SPE.

4. UCT columns are not affected by variation in bed mass because our tubes are packed automatically with state of the art machines which are controlled with highly engineered precision.

5. UCT invented the co-polymeric process of bonding hydrophobic and ionic exchange groups onto a single silica bead, thus analysts can be confident they are using the very best in SPE technology.

Monday, March 12, 2012

Analysis of Cocaine in Post Mortem Samples Using Clean Screen DAU SPE

Post mortem samples present the toxicologist with more challenges than most samples seen in forensic laboratories. The condition and volumes of the matrix can add to difficulties to be overcome. UCT is keenly aware of these issues, and for more than 25 years has offered forensic toxicology analysts the best solution with the well-known Clean Screen DAU Solid Phase Extraction column. This SPE material is unsurpassed, not only in its range of analytes, but in its efficiency in isolating from a wide variety of post mortem matrices. In the recent issue of Journal of Analytical Toxicology (March 2012, pp 141-143) Dr. Juhascik (UMass Memorial Hospital, MA) and his team report the finding of a isopropyl artifact in post mortem samples. The samples were comprehensively and completely analyzed for the presence of cocaine and metabolites. This work follows Dr. Juhascik's work comparing the efficiencies of liquid-liquid extraction vs SPE (Journal of Analytical Toxicology (2009 , 47, 553-557) where they determined that SPE (using Clean Screen DAU) far exceeded the liquid-liquid extraction in performance and efficiency.