Solid Phase Extraction Microplate Selection Guide Porvair Sciences announce the availability of a new guide that makes selection of the optimum Solid Phase Extraction (SPE) microplate for your application both quick and easy. SPE is a widely used method of sample preparation that concentrates and purifies analytes from a solution by means of absorption, followed by the elution of the analyte with a solvent appropriate for instrumental analysis, with techniques such as LC-MS. Choosing the correct SPE microplate for your application can mean the difference between indifferent and great results. Related Stories The selection guide adopts an easy-to-use flow chart to enable you to quickly select the most appropriate Porvair Sciences Microlute CP SPE microplate by sample matrix (aqueous or organic), analyte charge, solubility and polarity and finally sample retention mechanism.