BenAng SPE-12 Solid Phase Extraction Instrument

Overview

The BenAng SPE-12 Solid Phase Extraction Instrument is a semi-automatic, 12-channel parallel platform engineered for reproducible and scalable sample preparation in analytical laboratories. It operates on the fundamental principle of solid-phase extraction—selective retention of analytes on sorbent-packed cartridges via physicochemical interactions (e.g., reversed-phase, ion exchange, or hydrophilic-lipophilic balance), followed by controlled elution under optimized solvent strength and flow conditions. Designed as a robust alternative to manual column handling or low-throughput vacuum manifolds, the SPE-12 integrates precision fluidics, pressure-stable vacuum architecture, and modular solvent routing to support method development, routine QC workflows, and regulatory-compliant sample cleanup prior to HPLC, GC, LC-MS, or ICP-MS analysis.

Key Features

• 12 independent extraction channels with individual flow control valves—enabling differential flow rates across cartridges for heterogeneous sample matrices or multi-analyte methods.
• Vacuum manifold constructed from molded borosilicate glass with uniform wall thickness, rated for continuous operation at ≤–97 kPa (≥0.96 atm differential), minimizing risk of implosion and ensuring long-term structural integrity.
• PTFE-wetted fluid path—including solvent lines, valve manifolds, and cartridge adapters—provides exceptional chemical resistance against aggressive organic solvents (e.g., dichloromethane, acetonitrile, methanol) and acidic/basic aqueous phases.
• Corrosion-resistant high-molecular-weight polymer cartridge tray—mechanically stable under sustained vacuum load, non-deforming after repeated thermal cycling or extended use.
• Fog-resistant vacuum chamber design with sealed gasket interface prevents solvent vapor condensation and cross-contamination between adjacent channels.
• Integrated analog vacuum gauge enables real-time pressure monitoring during conditioning, loading, washing, and elution steps—critical for method transfer and troubleshooting.
• Modular solvent delivery system supports up to five independently routed eluents, facilitating gradient-like sequential washes and selective elution without manual line switching.

Sample Compatibility & Compliance

The SPE-12 accommodates standard 1 mL, 3 mL, 6 mL, and 12 mL SPE cartridges from major suppliers (e.g., Waters, Agilent, Thermo Fisher, Macherey-Nagel), including bonded silica, polymeric, and mixed-mode sorbents. Its PTFE-compatible architecture ensures compatibility with high-purity solvents required for trace-level environmental, pharmaceutical, and food safety analyses. The instrument supports method validation per ISO/IEC 17025 and aligns with sample preparation guidance in USP , EPA Methods 500/600 series, and EU Commission Regulation (EU) No 2021/2003 for pesticide residue analysis. While not inherently 21 CFR Part 11 compliant (as a standalone hardware platform), its operational parameters and manual recordkeeping workflow are fully compatible with GLP/GMP documentation practices when integrated into validated laboratory procedures.

Software & Data Management

The SPE-12 is a hardware-only platform with no embedded microprocessor or digital interface. All operation is manually initiated and monitored via mechanical valves and the analog vacuum gauge. This design eliminates firmware dependencies, reduces calibration overhead, and enhances long-term reliability in resource-constrained or regulated environments where software validation burdens must be minimized. Users maintain full procedural control through standardized SOPs; flow rate adjustments, solvent sequencing, and vacuum setpoints are recorded manually in lab notebooks or LIMS-integrated electronic records. Optional integration with external programmable vacuum controllers (e.g., KNF N86 KT.18) permits timed pressure ramping for advanced protocols—though such configurations require separate qualification.

Applications

• Environmental analysis: Cleanup of water, soil, and sediment extracts prior to GC-ECD or LC-MS/MS quantification of PAHs, PCBs, organochlorine pesticides, and PFAS.
• Pharmaceutical QA/QC: Removal of phospholipids and protein precipitates from plasma or urine prior to bioanalysis of small-molecule drugs and metabolites.
• Food safety testing: Isolation of mycotoxins (e.g., aflatoxin B1), veterinary drug residues (e.g., sulfonamides, tetracyclines), and adulterants from complex matrices including milk, honey, and cereal extracts.
• Clinical toxicology: Selective enrichment of opioids, benzodiazepines, and stimulants from whole blood or oral fluid specimens.
• Forensic chemistry: Pre-concentration and desalting of illicit drug metabolites in urine screening workflows.

FAQ

Is the SPE-12 compatible with 24-well plate-based SPE formats?

No—the SPE-12 is designed exclusively for individual cylindrical cartridges. Plate-based SPE requires dedicated positive-pressure or centrifugal platforms.
Can the vacuum pressure be digitally logged or exported?

Not natively. The analog gauge requires manual reading and transcription. For automated logging, an external pressure transducer and data acquisition system must be added.
What maintenance is required for long-term reliability?

Routine inspection of PTFE tubing for cracking, replacement of O-rings every 12 months, and periodic cleaning of the glass manifold with ethanol followed by nitrogen purge.
Does the instrument include a vacuum pump?

No—the SPE-12 is supplied without a vacuum source. A compact oil-free pump (e.g., ultimate vacuum ≤–98 kPa) is available as an optional accessory.
Are replacement parts such as valves or trays available separately?

Yes—BenAng provides OEM-certified spare kits for flow control valves, PTFE solvent manifolds, and polymer cartridge trays under part numbers documented in the service manual.