CoMetro R1/R2 Fraction Collector

Overview

The CoMetro R1/R2 Fraction Collector is a programmable, stepwise collection system engineered for integration with preparative liquid chromatography (prep-LC), flash chromatography, and gravity-fed or pump-driven column chromatography systems. It operates on a dual-mode collection architecture—supporting both linear (left-to-right) and serpentine (snake-style) tube indexing—ensuring consistent spatial distribution of fractions across multi-position racks without mechanical repositioning delays. The device employs a precision solenoid-driven switching valve and optically verified tube position sensing to achieve high reproducibility in fraction boundary definition. Its core function is to automate the physical separation of eluent streams into discrete, time- or volume-resolved fractions—critical for downstream purification, compound isolation, stability studies, and analytical method development. Designed for compatibility with UV/Vis, conductivity, and mass spectrometric detectors, it accepts TTL, analog, or Ethernet-based trigger signals for synchronized collection relative to chromatographic peaks.

Key Features

• Multi-parameter triggering: Independent selection of volume-based (mL), time-based (s/min), drop-count (via optical sensor), or peak-triggered (external analog/TTL input) collection modes.
• Modular rack compatibility: Supports standardized tube formats including 1.5 mL microcentrifuge tubes, 13 mm and 16 mm round-bottom test tubes, 18 mm and 25 mm culture tubes, and 50 mL conical centrifuge tubes—up to 144 positions per run.
• Low-latency tube switching: Valve actuation time < 120 ms ensures minimal carryover between fractions; combined with inert fluid path materials (PTFE, PEEK, borosilicate glass), cross-contamination is reduced to < 0.1% under validated conditions.
• Programmable method storage: Up to 16 user-defined collection protocols—including variable flow-rate segments, pause intervals, and conditional triggers—stored internally with timestamped execution logs.
• Integrated safety architecture: Dual redundant leak detection (capacitive + optical), isolated power supply, and grounded chassis design compliant with IEC 61010-1 for laboratory electrical safety.
• Space-optimized footprint: R1 (compact) and R2 (dual-rack) configurations allow flexible benchtop deployment; optional mounting brackets enable vertical stacking or integration into custom chromatography cabinets.

Sample Compatibility & Compliance

The R1/R2 collector accommodates aqueous, organic, and mixed-solvent mobile phases common in reversed-phase, normal-phase, and ion-exchange chromatography. All wetted components are chemically resistant to acetonitrile, methanol, THF, DCM, and dilute acids/bases (pH 2–12). Rack adapters are autoclavable (121°C, 20 min) for sterile applications. The instrument meets CE marking requirements under Directive 2014/30/EU (EMC) and 2014/35/EU (LVD). Its firmware supports audit trail generation and electronic signature capability when paired with CoMetro’s optional ChromoControl Suite v3.2—enabling compliance with FDA 21 CFR Part 11, ISO/IEC 17025, and EU GMP Annex 11 documentation standards.

Software & Data Management

Standalone operation requires no PC; all parameters are configured via intuitive membrane keypad and backlit LCD. For networked environments, USB and RS-232 interfaces support bidirectional communication with third-party chromatography data systems (CDS), including Waters Empower, Thermo Chromeleon, and Agilent OpenLab. Exportable CSV logs include collection timestamp, elapsed time, cumulative volume, trigger source, and rack position ID—structured for LIMS ingestion. Firmware updates are performed via secure signed .bin files; configuration backups can be saved to USB memory devices with SHA-256 integrity verification.

Applications

• Purification of natural products and synthetic intermediates in pharmaceutical R&D.
• Isolation of monoclonal antibody subpopulations (e.g., aggregates, fragments) from SEC or IEX runs.
• Preparative-scale separation of enantiomers using chiral HPLC columns.
• Automated collection of reaction quench samples for kinetic profiling (e.g., in flow chemistry setups).
• Fractionation of complex biological matrices (plasma, urine, tissue extracts) prior to LC-MS/MS analysis.
• Method transfer support between analytical and preparative systems under QbD principles.

FAQ

What types of chromatographic systems is the R1/R2 compatible with?
It interfaces with any system delivering analog voltage (0–10 V), TTL pulse, or Ethernet-based trigger output—including Agilent, Shimadzu, Gilson, Biotage, and custom-built pumps and detectors.
Can collection criteria be changed mid-run?
Yes—dynamic parameter adjustment is supported via front-panel controls or remote command (SCPI over RS-232), enabling adaptive fractionation based on real-time detector response.
Is validation documentation available for GMP environments?
CoMetro provides IQ/OQ protocol templates, traceable calibration certificates for flow and timing modules, and a full Design Qualification (DQ) report upon request.
How is tube position accuracy maintained over extended use?
A self-calibrating optical encoder monitors stepper motor rotation and rack position at startup and every 10th tube transition; positional drift is corrected automatically within ±0.1 mm tolerance.
Does the R2 model support independent control of each rack?
No—the R2 uses a shared valve manifold and sequential indexing; simultaneous dual-rack collection is not supported, but staggered start times and alternating tube assignment are programmable.