Agela SPE-CLEANER-M12 Positive-Pressure Solid Phase Extraction System

Overview

The Agela SPE-CLEANER-M12 is a semi-automatic, positive-pressure solid phase extraction (SPE) system engineered for high-reproducibility, parallel sample cleanup in trace organic analysis—particularly for persistent organic pollutants (POPs) including polychlorinated dibenzo-p-dioxins (PCDDs), dibenzofurans (PCDFs), dioxin-like polychlorinated biphenyls (DL-PCBs), and polybrominated diphenyl ethers (PBDEs). Unlike vacuum-based SPE manifolds, the M12 employs regulated compressed gas to deliver consistent, laminar flow through stacked or tandem SPE columns, minimizing channel-to-channel variability and eliminating vacuum-induced channel clogging or premature column drying. Its design adheres to methodological requirements outlined in EPA Method 1613B, EN 1948, and ISO 18073 for dioxin congener isolation from complex environmental matrices (e.g., soil, sediment, biological tissue extracts). The system operates without pumps or solenoid valves—relying instead on precision mechanical pressure regulation—ensuring long-term stability and low maintenance in regulated laboratory environments.

Key Features

• 12 independent, pressure-balanced channels with individual pneumatic on/off control per channel—enabling selective activation during multi-step protocols (e.g., conditioning, loading, washing, elution).
• Dual-stage pressure regulation: coarse adjustment (0–100 kPa) for column conditioning and fine-tuning (0–30 kPa) for sensitive elution steps—critical for preserving analyte integrity in ultra-trace POPs analysis.
• Full PTFE and borosilicate glass wetted path: eliminates metal ion leaching and organic adsorption; fully compatible with aggressive solvents (e.g., hexane, toluene, DCM, acetone) used in dioxin cleanup.
• Modular column adapter system supporting standard 10–25 mm ID glass SPE columns—including dual-column configurations (e.g., Florisil + silica gel or acidified silica + carbon) required for EPA 1613B-compliant dioxin fractionation.
• Compact footprint (W × D × H: 320 × 280 × 260 mm): designed for installation inside Class II biosafety cabinets or standard fume hoods—reducing operator exposure to halogenated solvents and airborne particulates.
• No electrical components in fluid path: intrinsically safe operation in solvent-rich environments; compatible with nitrogen or clean, oil-free compressed air supply.

Sample Compatibility & Compliance

The SPE-CLEANER-M12 supports sample volumes up to 50 mL per channel and accommodates both single- and tandem-column formats for multi-stage matrix removal. It has been validated for use with Agela’s Cape™ series dioxin-specific cleanup columns (e.g., Cape-Dioxin, Cape-DL-PCB), achieving >90% recovery across all 17 toxic PCDD/F congeners at sub-pg/g levels in spiked soil and fish lipid extracts. The system complies with GLP documentation requirements: all pressure settings, channel activation sequences, and run durations are manually logged per batch—fully traceable for audit readiness. While not an automated data-acquisition platform, its mechanical architecture aligns with ISO/IEC 17025 clause 6.4.10 (equipment suitability) and supports laboratories pursuing accreditation under CNAS or UKAS for POPs testing.

Software & Data Management

The SPE-CLEANER-M12 operates without embedded firmware or proprietary software. All operational parameters—including applied pressure, dwell time per step, and channel selection—are set manually via calibrated pressure gauges and toggle valves. This analog control architecture ensures deterministic behavior, eliminates cybersecurity vulnerabilities, and avoids validation overhead associated with computerized systems. Laboratories implementing 21 CFR Part 11 compliance may integrate manual logbooks with LIMS entries (e.g., sample ID, column lot number, pressure values, start/end timestamps) to satisfy electronic record retention requirements. No driver installation, cloud connectivity, or firmware updates are required—maximizing uptime and reducing IT dependency.

Applications

• Cleanup of lipid-rich extracts prior to HRGC-HRMS analysis of PCDD/Fs and DL-PCBs in environmental monitoring programs.
• Multi-residue purification of PBDEs and novel brominated flame retardants from dust and wastewater sludge extracts.
• Preparative fractionation of planar vs. non-planar PCB congeners using sequential silica gel and activated carbon columns.
• Method development for emerging contaminants (e.g., chlorinated paraffins, PFAS precursors) requiring orthogonal sorbent chemistries.
• Teaching laboratories: robust platform for demonstrating principles of column chromatography, breakthrough volume determination, and solvent strength optimization.

FAQ

Is the SPE-CLEANER-M12 compatible with EPA Method 1613B?
Yes—the system meets all mechanical and material requirements for the positive-pressure delivery and column geometry specified in Section 8.2.2 of EPA Method 1613B when used with certified cleanup columns and validated pressure settings.
Can it be used with plastic SPE cartridges?
No—only glass columns are supported due to pressure rating and chemical compatibility constraints; plastic cartridges are not rated for sustained positive pressure above 50 kPa and may deform or leak.
What gas supply is required?
Oil-free, particle-filtered nitrogen or compressed air at minimum 600 kPa inlet pressure; a standard lab-grade pressure regulator with dual-stage output is recommended.
Does it support method validation per ISO/IEC 17025?
Yes—its mechanical repeatability, documented pressure calibration, and full PTFE/glass construction enable straightforward uncertainty budgeting and equipment qualification per ISO/IEC 17025 Clause 6.4.
How is cross-contamination prevented between runs?
By design: no shared fluid paths; each channel has dedicated tubing, valve, and column holder; PTFE/glass surfaces resist residue adsorption and allow complete solvent rinsing between batches.