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ENVIRONMENTAL ANALYSIS I. Solid Phase Extraction

ENVIRONMENTAL ANALYSIS I. Solid Phase Extraction. columns vs. disks. Columns vs. Disks. Forms of SPE Disks. Solid Phase Extraction Disks (SPED s ) Teflon Disks Glass Fiber Disks Laminar Disks . Glass vs. PTFE Disks. EMPORE Disks (3M)

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ENVIRONMENTAL ANALYSIS I. Solid Phase Extraction

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  1. ENVIRONMENTALANALYSISI. Solid Phase Extraction columns vs. disks

  2. Columns vs. Disks

  3. Forms of SPE Disks Solid Phase Extraction Disks (SPEDs) • Teflon Disks • Glass Fiber Disks • Laminar Disks

  4. Glass vs. PTFE Disks EMPORE Disks (3M) • sorbent particles are bound in a web of inert micro-PTFE fibrils • can become clogged; wrinkle easily SPEC Disks (Ansys) • porous glass fiber matrix • thick, rigid; ‘self-filtering’

  5. Glass vs. PTFE Disks (cont.) Processing Times for High Particulate Samples

  6. SPE Tubes vs. Rigid Disks

  7. 47 mm 4.4 mL (2 mm solvent depth) Minimum Elution Volume 1 g sorbent 2.5 mL

  8. Large Volume Samples Sample size :1 liter Analytes : EPA 525.1compounds Elution Volume : Packed Bed Disk (mL) 2 x 2 2x5

  9. Glass Filtration Apparatus Disk

  10. PTFE Disk Holder

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