FEVE™ - Full Evaporative Vacuum Extraction
A new vacuum extraction technique that completely evaporates the volatile matrix through Sorbent Pens while retaining GC compatible compounds
FEVE provides complete analysis of SVOCs in water matrices.
Drinking Water
Ground Water
Waste Water
Beverages
Samples w/ low solid contents
FEVE - Analyzing Large Liquid Volumes by GCMS
Full Evaporative Vacuum Extraction (FEVE) is a Sorbent Pen extraction technique for preparing samples for GCMS analysis that evaporates the entire sample through the sorbent to recover semi-volatile compounds boiling up to 600 °C. Polar and non-polar target compounds are recovered equally, unlike other extraction methods for SVOCs that can show a bias towards one or the other. FEVE uses the volatilizing matrix as the carrier gas rather than relying on an external carrier gas, which dramatically reduces the potential for channeling and analyte breakthrough. FEVE can be used for any sample containing a volatile matrix with low suspended solids, including water, water/solvent mixtures, and solvent extracts. For extracts, FEVE can be considered an alternative to Programmable Temperature Vaporization (PTV) injection, as FEVE can handle up to 5000ul of sample while leaving all non-GC compatible compounds in the vial, rather than in the GC liner. With FEVE extractions, sensitivity increases while GCMS maintenance is vastly reduced.
FEVE performs the extraction in 2 sequential stages:
Matrix evaporation at 25-40 °C using a 0.3-10 psia vacuum depending on the solvent or matrix to be eliminated. The evolving matrix sweeps compounds of interest onto the sorbent while the matrix passes through unretained.
Diffusive or low N2 volume transfer under an increased vacuum and higher sample vial temperatures to transfer any remaining compounds still in the vial that were not recovered during matrix evaporative removal.
FEVE – Technique Selection Guide
Sample Type: Volatile liquid matrix with low solid content
Extraction Temperatures: 30 – 40 °C to remove volatile matrix, 50 – 280° C final vial heating
Extraction Times: 2-5 hours for 1cc 0.2-0.5 hours for 0.05-0.2cc
Operational Mode: Dynamic trapping using volatizing matrix, followed by Heated Vacuum Extraction at 1-2 Torr
Analyte BP Range: 100 °C to 600 °C
Vial Sizes: 2 mL or 6 mL
Typical 5800A Mode: SPLIT or SPLT/SPLTLESS
Water Management: Completely removed during Dynamic Evaporation Stage
FEVE30 Process
Weigh/measure sample into vial, attach FEVE vacuum sleeve and insert Sorbent Pen
Load up to 30 Pens and sample vials into FEVE30 Module
Perform automated extraction process using SPRINT control software
Desorb Sorbent Pens using 5800A SPDU manually or using SPR automated Sample Prep Rail
FEVE uses FSP Sorbent Pens, a modified version of standard Headspace HSP Pens. FSP Pens extend into the neck of 2mL and 6mL vials to ensure full recovery of compounds during FEVE extractions. The sample vial is attached to the vacuum sleeve through a side port in the sealing nut to speed up assembly, followed by insertion of the FSP Pen and tightening of the nut to create a vacuum-tight seal. From 1 to 30 Pen/Vial assemblies can be added to the FEVE30 module for simultaneous extraction, for either low or high sample throughput applications.
FSP- FEVE/Flash-VASE Sorbent Pens
FEVE30 Workflow - Simple and Highly Reproducible
Introduce sample and recovery surrogates into vial, assemble into vacuum sleeve, and insert FSP Sorbent Pen.
Load Vial/Pen assemblies into FEVE30 module, perform automated leak check followed by automated extraction using SPRINT software. A water condensing cold trap eliminates it can impact the vacuum pump.
Unload Pens and place into Isolation tray for transfer to the GCMS Lab.
Perform Automated Split or Splitless analysis of the Pens using GCMS.
Sorbent Pens are Ready for Re-use.
Clean vacuum sleeves and O-rings without solvents using the 3700 which both steam cleans and dry cleans parts under vacuum prior to reuse.
Compare All Sorbent Pen Extraction Techniques For Complete Coverage of VOC to SVOC Analysis Of Virtually Any Matrix
