Polytech PPM48 Positive-Pressure Solid Phase Extraction System
| Brand | Polytech |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Original Equipment Manufacturer (OEM) |
| Country of Origin | China |
| Model | PPM48 |
| Pricing | Available Upon Request |
Overview
The Polytech PPM48 Positive-Pressure Solid Phase Extraction (SPE) System is an engineered solution for high-throughput, reproducible sample preparation in analytical laboratories. Unlike vacuum-based SPE manifolds or low-capacity automated platforms, the PPM48 employs controlled positive-pressure gas delivery—using nitrogen or compressed air—to drive solvent and sample solutions through SPE cartridges with precise, uniform flow dynamics. This methodology is grounded in Darcy’s law and capillary flow principles, where applied pressure overcomes bed resistance and ensures consistent wetting of sorbent surfaces across all channels. The system is designed for routine use in environmental analysis (e.g., pesticide residue testing per EPA Method 525.3), food safety (mycotoxin extraction per AOAC 2012.01), pharmaceutical QC (residual solvent cleanup per USP ), and clinical toxicology workflows requiring parallel processing of large sample batches under GLP-compliant conditions.
Key Features
- Simultaneous positive-pressure processing of up to 48 SPE cartridges—configurable for 1 mL, 3 mL, 6 mL, 10 mL, or 15 mL formats via interchangeable support plates.
- Modular four-row manifold design: Row 1 operates at default pressure; Rows 2–4 feature independent pressure regulation via dedicated flow indicators and fine-tuning valves—enabling method-specific optimization for conditioning, washing, and elution steps.
- Dual-stage pressure regulator: Separate setpoints for extraction (typically 10–30 psi) and cartridge drying (up to 75 psi), minimizing analyte loss during desolvation while preserving sorbent integrity.
- Integrated 10 µm particulate filtration on the inlet gas line to prevent contamination of pressure control components and ensure long-term pneumatic stability.
- Motorized lift mechanism with single-button actuation for precise vertical positioning of the sample plate—combined with silicone gasket sealing—ensures leak-free operation across all 48 ports.
- Gas distribution architecture places regulators and flow paths above the sample plane, reducing pressure drop variability and delivering uniform force (< ±1.5 psi deviation across all columns, verified per ISO/IEC 17025 internal calibration protocol).
Sample Compatibility & Compliance
The PPM48 supports standard SPE chemistries including C18, silica, SCX, SAX, Florisil®, and mixed-mode sorbents from major suppliers (e.g., Waters, Agilent, Thermo Fisher). Cartridge compatibility extends to both polypropylene and glass-fritted housings. The system meets mechanical and operational requirements referenced in ASTM D7292 (liquid-phase extraction equipment performance criteria) and aligns with FDA 21 CFR Part 11 data integrity expectations when paired with validated LIMS or ELN systems. Pressure control repeatability (RSD < 2.1% over 100 cycles) supports audit readiness for ISO/IEC 17025 accreditation and GMP-regulated environments.
Software & Data Management
While the PPM48 operates as a standalone hardware platform without embedded firmware or touchscreen interface, it is fully compatible with laboratory documentation systems that capture procedural metadata—including operator ID, date/time stamps, pressure setpoints per row, and step durations—via external logbooks or electronic notebooks compliant with ALCOA+ principles. Optional integration with LabVantage or STARLIMS enables traceable linkage between SPE run records and downstream LC-MS/MS or GC-FID analyses. All mechanical adjustments (e.g., valve positions, lift height) are manually documented per SOP, satisfying GLP requirement §58.130 for equipment use records.
Applications
- Environmental labs: Multi-residue analysis of PAHs, PCBs, and organochlorine pesticides in water, soil, and sediment extracts.
- Food testing facilities: Simultaneous cleanup of aflatoxins, ochratoxin A, and deoxynivalenol from cereal matrices prior to HPLC-FLD quantification.
- Pharmaceutical QC: Removal of phospholipids and endogenous interferences from plasma samples prior to bioanalysis per ICH M10 guidelines.
- Clinical toxicology: High-volume urine screening for opioids, benzodiazepines, and stimulants using mixed-mode cation-exchange SPE.
- Academic research: Method development for novel sorbent materials where column-to-column flow consistency is critical for kinetic adsorption studies.
FAQ
What gases are compatible with the PPM48 system?
Nitrogen (N₂) and oil-free compressed air up to 75 psi are supported. A 10 µm inline filter is mandatory for particulate removal.
Can different SPE cartridge volumes be processed in one run?
Yes—by installing the appropriate support plate, users can mix 1 mL, 3 mL, and 6 mL cartridges within the same 48-position array, provided flow rates are adjusted per row.
Is the system suitable for regulated environments such as pharmaceutical QA?
Yes—the mechanical design, pressure repeatability, and compatibility with ALCOA+-compliant documentation systems meet foundational requirements for GMP and GLP workflows.
How is column drying performed?
Using the dual-stage regulator, users switch to the higher-pressure drying setting and direct airflow through each cartridge for solvent evaporation—no additional hardware required.
Does the PPM48 require routine calibration?
Annual verification of pressure gauges against NIST-traceable standards is recommended; no software calibration is needed due to its purely pneumatic architecture.
