Chengmeng CM-SPE-48 Positive-Pressure Solid Phase Extraction System
| Brand | Chengmeng |
|---|---|
| Origin | Beijing, China |
| Model | CM-SPE-48 |
| Automation Level | Manual |
| Channel Count | 48-channel parallel |
| Extraction Type | Cartridge-based SPE |
| Flow Rate Control | 0–30 mL/min (adjustable via dual-range pressure regulation) |
| Solvent Selection | Up to 5 independent solvent lines |
| Sample Capacity | 1–48 samples per run |
| Pressure Range | Low-flow mode: 0–60 psi (0.3–0.4 MPa) |
| High-flow mode | 0–140 psi (0.97–1.0 MPa) |
| Contact Materials | 316 stainless steel gas block, regulators, and fluid path components |
| Compatible Column Sizes | 1 mL, 3 mL, 6 mL SPE cartridges |
| Collection Vessels | 12 × 32 mm vials (5 mL, 15 mL), 1.5 mL microcentrifuge tubes |
| Gas Supply | Nitrogen or clean compressed air (filtered, oil-free, ≤1.0 MPa inlet pressure) |
Overview
The Chengmeng CM-SPE-48 Positive-Pressure Solid Phase Extraction System is an engineered solution for high-throughput sample preparation in regulated and research-intensive laboratories. Unlike vacuum-driven SPE platforms—whose performance degrades significantly with viscous or particulate-laden matrices—the CM-SPE-48 employs a precisely controlled positive-pressure gas delivery architecture. This design applies uniform pneumatic force across all 48 extraction channels simultaneously, eliminating inter-channel flow variability and ensuring consistent breakthrough volumes, elution kinetics, and analyte recovery across replicate cartridges. The system operates on the fundamental principle of pressure-driven fluid displacement through packed sorbent beds, enabling robust, reproducible phase separation under defined thermodynamic and kinetic conditions. Its dual-range pressure control (0–60 psi for gentle conditioning/washing; 0–140 psi for challenging biological matrices such as whole blood, plasma, or tissue homogenates) makes it especially suited for pharmaceutical development workflows where matrix complexity and regulatory traceability are critical.
Key Features
- 48-position parallel processing with fully independent channel pressure equalization—no cross-talk or pressure bleed between columns
- Dual-scale pressure regulation: low-flow range (0–60 psi / 0.3–0.4 MPa) for sensitive sorbents and high-flow range (0–140 psi / 0.97–1.0 MPa) for viscous or clogging-prone samples
- Four independently switchable flow paths—each controlling 12 columns—to support staggered protocols or multi-solvent sequential elution
- Stainless steel (316 SS) gas distribution block, regulators, and manifold—chemically inert, corrosion-resistant, and compatible with aggressive organic solvents (e.g., DCM, acetone, methanol)
- Precision flow monitoring via calibrated 0–30 mL/min flowmeter integrated into each pressure-regulated line
- Modular column alignment system with precision-machined SPE cartridge guider plates and adjustable positioning sliders for repeatable cartridge seating and seal integrity
- Integrated gas filtration and pressure stabilization: built-in coalescing filter and dual-stage pressure regulator ensure particle-free, moisture-controlled gas supply
Sample Compatibility & Compliance
The CM-SPE-48 accommodates standard 1 mL, 3 mL, and 6 mL SPE cartridges from major vendors (e.g., Waters, Agilent, Thermo Fisher, Phenomenex), including reversed-phase (C18, C8), ion-exchange (SCX, SAX), and mixed-mode sorbents. It supports aqueous, organic, and mixed-aqueous sample types—including whole blood, serum, urine, soil extracts, food homogenates, and environmental water concentrates—without column channeling or bed collapse. For regulated environments, the system’s mechanical repeatability, pressure traceability (via analog gauges with ±1.5% FS accuracy), and absence of electronic controllers simplify validation documentation. While not inherently 21 CFR Part 11 compliant (as it lacks software-based audit trails), its manual operation aligns with GLP-compliant SOPs requiring operator-initiated, observable, and recordable parameter adjustments. It meets ISO/IEC 17025 requirements for method validation when used within documented, laboratory-specific calibration and maintenance procedures.
Software & Data Management
The CM-SPE-48 is a hardware-only platform with no embedded firmware or proprietary software interface. All operational parameters—including pressure setpoints, flow path selection, and gas source routing—are adjusted manually via calibrated analog regulators, toggle switches, and mechanical positioners. This architecture eliminates cybersecurity risks, software obsolescence, and vendor lock-in. Users maintain full procedural control by recording settings directly in lab notebooks or LIMS-integrated electronic records. Pressure values are monitored in real time using dual analog gauges (low- and high-range), each traceable to NIST-calibrated references. For laboratories implementing digital workflows, external data loggers can be interfaced with optional pressure transducers (not included) to capture time-stamped pressure and flow profiles during method development.
Applications
- Pharmaceutical R&D: High-throughput bioanalytical sample cleanup prior to LC-MS/MS analysis of drug candidates in plasma, CSF, and tissue lysates
- Clinical toxicology: Simultaneous extraction of opioids, benzodiazepines, and stimulants from hemolyzed or lipemic blood specimens
- Environmental analysis: Concentration and purification of PAHs, PCBs, and organochlorine pesticides from sediment pore water and wastewater effluents
- Food safety testing: Multi-residue extraction of mycotoxins (e.g., aflatoxin B1, ochratoxin A) from cereal grains and dairy products
- Forensic chemistry: Selective isolation of synthetic cannabinoids and novel psychoactive substances from complex hair or oral fluid matrices
FAQ
What gas sources are compatible with the CM-SPE-48?
Nitrogen (≥99.998% purity) or oil-free, desiccated compressed air (≤0.01 µm particulate filtration, dew point ≤−40°C) are recommended. Inlet pressure must not exceed 1.0 MPa.
Can I use non-standard SPE cartridges (e.g., 10 mL or custom-packed columns)?
Yes—provided physical dimensions align with the column guider plate tolerances (max OD 16 mm, height 100 mm) and sealing surfaces remain intact. Performance validation is required for non-standard formats.
Is the system suitable for GMP environments?
It supports GMP-aligned workflows when operated within validated SOPs, with documented pressure calibration, preventive maintenance logs, and operator training records—but does not provide electronic audit trails or user access controls.
How is leak integrity verified before a run?
Close all flow paths, pressurize to 60 psi, and observe the low-range gauge for ≥5 minutes; drift >2 psi indicates seal failure at cartridge ports or gas block fittings.
What maintenance intervals are recommended?
Gas filters should be replaced every 6 months or after 500 runs; stainless steel regulators require annual recalibration against certified pressure standards; O-rings and sealing pads should be inspected and replaced per usage frequency (typically every 200–300 runs).
