Waters Alliance 2695 HPLC System

Overview

The Waters Alliance 2695 HPLC System is a modular, high-performance liquid chromatography platform originally engineered for robust routine analysis in regulated pharmaceutical, academic, and quality control laboratories. Built upon Waters’ proven Alliance architecture, the system employs low-dead-volume solvent delivery with dual-piston positive displacement pumps, enabling precise gradient formation, high-pressure stability up to 5000 psi, and exceptional retention time reproducibility (<0.1% RSD). The system operates on a unified controller architecture supporting synchronized operation of pump, autosampler, column heater, and detector modules via the Empower™ software environment. This refurbished unit has undergone full functional validation—including leak testing, pressure calibration, gradient accuracy verification, and baseline noise/stability assessment—and complies with original Waters performance specifications for flow precision (±0.1% RSD), dwell volume consistency (<800 µL), and injection repeatability (<0.5% RSD at 10 µL).

Key Features

• Modular design supporting up to four independent solvent channels with integrated degassing and dynamic gradient mixing
• Autosampler with 120-position vial capacity, programmable injection volumes (0.1–100 µL), and temperature-controlled sample compartment (4–40 °C)
• Column oven with precise temperature control (5–85 °C) and real-time monitoring for method transfer reliability
• Integrated system controller with Ethernet connectivity and embedded diagnostics for remote status monitoring
• Refurbishment includes replacement of critical wear components: pump seals, check valves, injector rotor seals, and detector lamp assemblies
• Fully validated per Waters-recommended PQ protocols; documentation includes as-found/as-left test reports and calibration certificates

Sample Compatibility & Compliance

The Alliance 2695 accommodates standard 3.9–4.6 mm ID analytical columns (up to 250 mm length) and is compatible with reversed-phase, normal-phase, ion-exchange, and size-exclusion chromatography methods. It supports mobile phases containing aqueous buffers, organic modifiers (acetonitrile, methanol), and additives such as TFA or ammonium acetate. All refurbished units are verified for compliance with key regulatory expectations: data integrity aligned with FDA 21 CFR Part 11 requirements when used with Empower 3 or later, audit trail functionality enabled by default, and electronic record retention consistent with GLP/GMP documentation practices. System suitability testing (SST) parameters—including tailing factor, resolution, and theoretical plates—are fully configurable and reportable within Empower.

Software & Data Management

Operation and data acquisition are managed through Waters Empower Chromatography Data Software (CDS), version 3 Feature Release 5 or higher. The system supports secure user authentication, role-based access control, electronic signatures, and automated backup of raw data (.raw files), processing methods, and audit trails. All refurbished instruments include licensed CDS installation media and activation keys compatible with current Windows OS versions (Windows 10/11, 64-bit). Raw data files retain native Waters format compatibility for reprocessing, peak integration refinement, and spectral library matching—particularly critical when paired with the included 2998 PDA detector for peak purity assessment and spectral deconvolution.

Applications

This configuration—Alliance 2695 coupled with the Waters 2998 Photodiode Array Detector—is optimized for applications requiring multi-wavelength detection, spectral confirmation, and quantitative analysis across complex matrices. Typical use cases include stability-indicating assays for pharmaceutical actives, impurity profiling per ICH Q3B guidelines, natural product fingerprinting, dissolution testing, and QC release testing of small-molecule APIs. The PDA detector provides full UV-Vis spectra (190–800 nm) at 1.2 nm resolution with <0.001 AU noise and linear dynamic range exceeding 2.5 AU, enabling simultaneous quantitation and qualitative identification without method re-injection.

FAQ

Is this instrument suitable for GMP-regulated environments?
Yes—when operated with validated Empower CDS and documented procedures, the refurbished 2695 meets core instrumentation requirements for GMP-compliant laboratories per EU Annex 11 and USP .
What documentation is provided with the system?
Each unit ships with a comprehensive refurbishment dossier: IQ/OQ summary report, as-found/as-left test data, calibration certificates for pump flow and detector absorbance, and a 6-month limited warranty statement.
Can the system be upgraded to support modern communication protocols?
Yes—the embedded controller supports LAN-based communication and can interface with LIMS via ASTM E1384 or HL7-compliant middleware; optional USB-to-Ethernet adapters enable legacy PC integration.
Does the 2998 PDA detector include spectral library support?
Yes—the detector is supplied with Waters’ built-in spectral library (including >2,000 compounds) and supports user-defined library creation and matching algorithms for peak identification.
What maintenance services are available post-purchase?
SpectraLab Scientific offers extended service plans, on-site PM visits, spare parts kits, and remote troubleshooting support staffed by Waters-certified field engineers.