Complying with EPA Method 1664A by Automated Solid Phase Extraction Utilizing the SPE-DEX® 4790 with Envision® Platform v1.02

The purpose of this application note is to demonstrate the viability of a solid phase extraction method utilizing the Horizon Technology SPE-DEX® 4790 Extractor with the Envision® Platform software version 1.02 to extract samples for EPA Method 1664A and fulfill all QC requirements. EPA Method 1664A is a performance based method which is used to find the total n-hexane extractable material and the silica-gel treated n-hexane extractable material within a sample. The method specifically outlines the steps needed to perform the liquid liquid extraction and details the process to determine if an alternative method may be used.