Horizon Technology, Inc.


Oil & Grease Application Notes EPA Method 1664A was developed to determine the precise amount of n-Hexane Extractable Material (HEM) and Silica Gel Treated n-Hexane Extractable Material (SGT-HEM) that exist within a water sample. The HEM or SGT-HEM that is extracted contains a mix of various hydrocarbons usually residing within the semi-volatile range with a boiling point greater than 85°C. The resulting weight of HEM or SGT-HEM is determined gravimetrically. Method 1664A is a unique method at Horizon Technology, as it is able to be automated on all our extractors, and we have developed Application Notes which, when programmed into the extractors controller, allow for the automated extraction of Oil and Grease samples on any of our extractors.
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	Complying With EPA Method 1664A by Automated Solid Phase Extraction Utilizing the SPE-DEX® 4790 with Envision® Platform v1.02

	Complying With EPA Method 1664A by Automated Solid Phase Extraction Utilizing the SPE-DEX® 1000/3000XL Controller v2.2

	Elimination of Excess Water in EPA Method 1664A by Automated Solid Phase Extraction Utilizing the SPE-DEX® 1000/3000XL Controller v2.2

	Complying with the Modifications to EPA Method 1664A Utilizing the SPE-DEX® 1000XL/3000XL Controller v1.08

	Download the official EPA Method 1664A document (pdf)

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