JIZHOU Oligo DNA Synthesis Column

Overview

The JIZHOU Oligo DNA Synthesis Column is a precision-engineered solid-phase support platform designed for automated and semi-automated phosphoramidite-based oligonucleotide synthesis. Constructed from chemically inert, high-pressure-rated materials—including reinforced polypropylene housings and solvent-compatible frits—the column serves as the core reaction vessel where controlled coupling, deprotection, oxidation, and capping cycles occur on derivatized solid supports (e.g., controlled-pore glass or polystyrene beads). Its modular design accommodates variable bed heights and diameters to match scale requirements—from analytical-scale (≤1 µmol) to industrial-scale (≥100 mmol) synthesis—while maintaining consistent flow dynamics, uniform reagent distribution, and minimal channeling under continuous or stepwise delivery protocols. The column operates within standard DNA/RNA synthesizer fluidic architectures and integrates seamlessly with common instrument manifolds (e.g., 1/4″–28 UNF or M6 threaded ports), supporting both batch-mode and continuous-flow synthesis workflows.

Key Features

• Adjustable bed height mechanism enabling precise optimization of synthesis efficiency and coupling kinetics across scales (standard range: 0–150 mm; extended range: 50–300 mm)
• Multiple internal diameter options (35 mm to 350 mm) to support synthesis scales from microgram to kilogram output per run
• Rated for sustained operation at 2 MPa (290 psi), ensuring compatibility with high-flow-rate pumping systems and viscous reagent delivery
• Chemically resistant construction validated for repeated exposure to anhydrous acetonitrile, dichloromethane, 3% trichloroacetic acid in DCM, iodine/water/pyridine oxidation mixtures, and 20% diisopropylethylamine in acetonitrile
• Integrated sintered polymer or stainless-steel frits (pore size: 5–20 µm) providing mechanical stability for fine-particle supports without clogging or backpressure spikes
• Standardized port geometry and sealing interface for direct integration into commercial synthesizers (e.g., ABI 394, BioAutomation MerMade, Glen Research Expedite, and custom OEM platforms)

Sample Compatibility & Compliance

The Oligo Synthesis Column supports a broad range of solid-phase carriers, including CPG (500–1000 Å pore size), macroporous polystyrene (MPPS), and specialty resins functionalized for RNA, LNA, PNA, or modified nucleotide incorporation. It complies with fundamental requirements for Good Manufacturing Practice (GMP) environments when used in conjunction with validated synthesizer hardware and documented change-control procedures. While not individually certified to ISO 13485 or FDA 21 CFR Part 11, the column’s material traceability (USP Class VI compliant polymers), pressure integrity testing records, and absence of leachable additives facilitate inclusion in quality systems governed by ISO 9001, ISO 14001, and ICH Q5A/Q5D. End users are responsible for system-level validation per their internal SOPs and applicable regulatory frameworks (e.g., USP <1058>, EP 2.2.47).

Software & Data Management

As a passive hardware component, the column does not incorporate embedded electronics or firmware. Its performance parameters—including bed volume, linear velocity, void volume, and pressure drop—are integrated into synthesizer control software via user-defined method templates. Instrument platforms with audit-trail functionality (e.g., those compliant with 21 CFR Part 11) log column installation events, cycle count, and maintenance history when paired with compatible asset-tracking modules. JIZHOU provides dimensional schematics, pressure/flow calibration curves, and resin-loading calculation tools in PDF and Excel formats to support method development and tech transfer documentation.

Applications

• Research-grade oligonucleotide synthesis for PCR primers, sequencing probes, antisense oligos, and CRISPR gRNA scaffolds
• GMP-compliant manufacturing of therapeutic oligonucleotides (e.g., antisense, siRNA, aptamers) under process validation protocols
• Scale-up of modified nucleic acid production (2′-O-methyl, phosphorothioate, 5-methylcytosine) requiring extended residence time and controlled reagent stoichiometry
• Development of novel solid supports and linker chemistries via comparative column performance testing
• Multi-column parallel synthesis systems for library generation and structure–activity relationship (SAR) studies

FAQ

What is the maximum recommended flow rate for the 35 mm column during coupling steps?

Flow rates should be optimized based on resin swelling behavior and reagent viscosity; typical ranges are 0.5–2.0 mL/min for 35 mm columns using standard CPG supports.
Can these columns be sterilized using autoclaving or gamma irradiation?

No—polypropylene components are not autoclavable; gamma irradiation may compromise structural integrity and chemical resistance. Ethanol rinsing and nitrogen purging are recommended for aseptic handling.
Do you provide pre-packed columns with specific resins or linkers?

Yes—custom pre-packed configurations (e.g., Universal Support CPG, RNA-CPG, or dT-CPG) are available upon request with full Certificate of Analysis and lot-specific loading data.
How is column backpressure monitored during synthesis?

Backpressure is measured upstream of the column inlet using inline pressure transducers integrated into the synthesizer’s fluidic control unit; JIZHOU supplies reference pressure-drop vs. flow-rate curves for each diameter variant.
Are replacement frits and O-rings available as spare parts?

Yes—frit kits (5 µm and 10 µm pore sizes) and fluorocarbon O-ring sets are stocked under part numbers JZ-FRIT-35, JZ-FRIT-70, and JZ-OR-STD.