You’ve come to the right place for solid phase extraction expertise. For over 20 years, Environmental Express has been a leader in products for EPA Method 1664 for oil and grease analysis. Our patented, classic StepSaver™ system revolutionized solid phase extraction by saving time and simplifying the extraction process for many analysts. We continue this legacy in our improved StepSaver system. Use the QuikVap Evaporator for fast, efficient evaporation of hexane extractable materials generated by EPA Method 1664. You can also find extraction disks and EPA 1664 standards and reagents. And, if you want to automate your analysis, we have the new SPE-Express 2 unit available now.