Part No: P077Issued year: 2014File size: 0.48mbFile type: pdf
This poster uses gel electrophoresis data to visually illustrate the amount of residual protein in extracts prepared using protein precipitation, supported liquid extraction and various silica and polymer based SPE approaches.
Part No: TN125Issued year: 2003File size: 0.07mbFile type: pdf
The ISOLUTE HCX series of mixed-mode SPE sorbents is based on a combination of strong cation exchange and non-polar chemistries. Basic drugs are retained by two primary retention mechanisms. This allows a rigorous interference elution regime to be used to elute interferences retained by either non-polar or cation exchange interactions alone. Only analytes with both non-polar and basic characteristics are extracted using the ISOLUTE HCX series of sorbents, providing an extremely pure final extract.
Part No: TN126Issued year: 2003File size: 0.06mbFile type: pdf
ISOLUTE non-polar SPE sorbents retain drugs from aqueous biological fluids through hydrophobic interactions. Endogenous compounds from the original sample matrix, such as proteins, are not retained. When the sorbent is rinsed, weakly retained compounds are eluted to waste, leaving strongly retained compounds to be eluted in the final elution solvent.
Part No: Issued year: 2007File size: 0.48mbFile type: pdf
•Extends the range of acidic, basic and neutral compounds that can be extracted using a single generic method, increasing method development productivity•Has an optimized pore structure which reduces the extraction of endogenous matrix components, and leads to cleaner extracts that give fewer matrix effects in LC-MS/MS analysis•Has optimized physical and chemical characteristics that improve reliability of SPE procedures•Has no secondary interactions, allowing the use of pure organic elution solvent to give high recoveries of very low drug concentrations