Sanotac CS2501 Medium-Pressure Chromatography System for Protein Purification

Overview

The Sanotac CS2501 Medium-Pressure Chromatography System is an integrated, laboratory-scale preparative liquid chromatography platform engineered for reproducible separation and purification of biomolecules—including proteins, peptides, antibodies, natural products, and synthetic organic compounds—under controlled medium-pressure conditions (up to 5 MPa). Built upon a dual-piston, high-fidelity parallel pump architecture with real-time cavity pressure feedback, the system compensates for solvent compressibility and refill dynamics across its full flow range (0.1–100.00 mL/min), delivering exceptional flow stability and low pulsation (<0.1 MPa pressure ripple). Its UV/Vis detector employs a dual-lamp optical design (imported deuterium and tungsten lamps) enabling continuous spectral coverage from 190 nm to 800 nm, supporting dual-wavelength simultaneous detection, time-programmed wavelength scanning, and stop-flow spectral acquisition—critical for resolving co-eluting species and verifying peak homogeneity in complex biological matrices. The system operates as a closed-loop, PC-controlled workflow, with all modules—including pump, detector, six-port preparative injection valve (standard 10 mL loop), and automated fraction collector—orchestrated via Sanochrom™ chromatography software.

Key Features

• Microprocessor-controlled dual-servo pump with floating plunger design and PEEK or 316L stainless steel wetted path options—optimized for long-term seal integrity and chemical resistance to aqueous/organic mobile phases.
• Advanced flow compensation algorithms, including cam-profile pulsation suppression and multi-point flow calibration curves, ensuring ±0.5% flow accuracy and RSD ≤0.5% across the entire dynamic range.
• Dual-lamp UV/Vis detector with <0.75×10⁻⁵ AU baseline noise (254 nm, 1 s time constant) and 0–2 AU linear absorbance range—enabling high-sensitivity quantitation of low-abundance targets without signal saturation.
• Automated fraction collector featuring hybrid linear-rotary actuation, sub-millisecond vial switching, independent waste routing, and programmable delay volume compensation to correct for system dwell volume and ensure precise peak cutting.
• Intelligent lamp and flow cell exchange mechanism—allowing rapid maintenance with minimal downtime; automatic lamp selection based on wavelength setting ensures optimal source lifetime and photometric stability.
• 10-user-programmable gradient and flow methods, with real-time on-the-fly modification of gradient slope, hold time, and flow rate during active runs—supporting method scouting and iterative optimization.

Sample Compatibility & Compliance

The CS2501 accommodates diverse sample formats—including clarified lysates, ammonium sulfate precipitates, dialyzed fractions, and synthetic crude mixtures—via manual or automated liquid/solid loading through its high-capacity 10 mL loop valve. Column compatibility spans standard analytical to semi-preparative dimensions (i.d. 10–50 mm), supporting reversed-phase (C4, C8, C18), ion-exchange (SP, Q, DEAE), size-exclusion (SEC), and affinity resins. All hardware and firmware components meet CE marking requirements for electromagnetic compatibility (EMC) and low-voltage directive compliance. The Sanochrom™ software implements full 21 CFR Part 11 functionality—including role-based user authentication, immutable audit trails, electronic signatures with biometric or token-based verification, and secure data archiving—validated for GLP and GMP-aligned workflows in pharmaceutical development, biologics characterization, and natural product isolation labs.

Software & Data Management

Sanochrom™ is a Windows-native (Windows 7/8/10/11) chromatography data system (CDS) providing unified control of all CS2501 modules via USB 2.0 and RS-232 interfaces. It supports real-time multi-wavelength signal overlay, peak integration with customizable baseline algorithms (tangent skim, valley-to-valley, exponential skew), retention time locking, and purity assessment via spectral homogeneity analysis. Raw data files are stored in vendor-neutral, timestamped .cdf format (compatible with third-party chemometrics tools). Audit trail logs record every parameter change, method execution, user login/logout, and file export event—with tamper-evident hashing and time-stamped digital signatures. Backup and restore protocols support networked NAS or local encrypted drives, satisfying ALCOA+ (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available) data governance standards.

Applications

The CS2501 serves as a versatile tool for early-stage bioprocess development, including: (1) purification of His-tagged recombinant proteins from E. coli or mammalian expression systems using immobilized metal affinity chromatography (IMAC); (2) desalting and buffer exchange of antibody fragments via SEC; (3) isolation of cytotoxic alkaloids or polyphenols from plant extracts using reversed-phase or hydrophilic interaction liquid chromatography (HILIC); (4) removal of synthesis by-products and unreacted starting materials in peptide and oligonucleotide manufacturing; and (5) stability-indicating assays for forced degradation studies per ICH Q5C guidelines. Its robustness, regulatory-compliant software, and scalable flow/pressure envelope make it suitable for method transfer to higher-pressure systems and bridging studies between analytical and process-scale purification.

FAQ

What is the maximum column backpressure the CS2501 can sustain?
The system is rated for continuous operation up to 5 MPa (725 psi), with pressure monitoring and automatic shutdown at 5.5 MPa to protect columns and fluidic components.
Can the detector perform spectral scans during gradient elution?
Yes—the stop-flow scanning mode allows full 190–800 nm spectra acquisition at user-defined retention times, while time-programmed wavelength mode enables dynamic wavelength switching during runs.
Is the fraction collector compatible with non-standard tube formats?
The standard rack holds two rows of 60 × Φ15 mm × 150 mm tubes, but custom racks for 13 mm, 20 mm, or microplate formats are available as optional accessories with auto-detection logic.
How is data integrity ensured during long-duration purification runs?
Sanochrom™ writes raw detector and pump status data continuously to non-volatile memory at 10 Hz; power loss triggers automatic save-to-disk and resume-on-reboot capability with run-state recovery.
Does the system support method validation per ICH Q2(R2)?
Yes—built-in tools enable linearity assessment (5–7 concentration levels), precision testing (intra-day/inter-day RSD), LOD/LOQ determination, and robustness evaluation (±5% flow, ±2 nm wavelength, ±1 °C column temperature), with report templates aligned to ICH documentation structure.