SPE Disks

Oil and Grease Filters for EPA Method 1664A

Xenosep Oil and Grease SPE Filters set a new standard for performing EPA Method 1664A. The unique triple layer construction enables large amounts of particulate and soluble interferences to be filtered out in one pass. The easy to perform SPE method is less expensive and less cumbersome than hexane liquid/liquid extraction. Compared to other SPE brands, Xenosep easily filters the difficult samples faster.

Completely Filter the Toughest Samples
in 10 Minutes or Less

• Comply with proposed rule to withdraw CFC methods - Meets approved EPA Method 1664A quality specifications
• Compared to LLE, SPE saves time and money - Eliminates emulsions
• Entry level technicians can easily process 8 samples/hour
• Compatible with all automated and manual SPE systems - Including Bakerbond® SPEEDISKS®

Step 1: Prepare Sample

• Acidify to pH < 2
• Record volume or weight
• Spike 40 mg/L PAR (Precision And Recovery)

Step 2: Condition Filter

• 1 x 10 mL IPA
• 2 x 10 mL DI H2O
• Keep filter wet
• Discard waste

Step 3: Filter Sample

• Vacuum > 15” Hg
• Decant solid
• Dry for 2 minutes
• Prefilters optional

Step 4: Extract Filter

• Vacuum < 5” Hg
• 3 x 10 mL Hexane
• Rinse glassware thoroughly
• Dry extract with Na2SO4
• Drying device optional

Step 5: Distill Hexane

• Set water bath to 85°C
• Distill to last few drops
• N2 purge for 15 seconds
• Recover solvent

Step 6: Weigh Extract

• Pre-tare boiling flask
• Dessicate to stable weight
• Weigh to 0.1 mg

For more information about Xenosep disks, please visit the Xenosep website.

Applications
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