Varian PrepStar HPLC System
| Origin | Canada |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | PrepStar |
| Price Range | USD 13,500 – 40,500 (FOB) |
| Product Category | Chromatography |
| Operational Age | 5–7 years |
| Warranty | 6 months limited parts & labor |
Overview
The Varian PrepStar HPLC System is a high-performance preparative liquid chromatography platform originally engineered by Varian, Inc. (now part of Agilent Technologies), and widely deployed in pharmaceutical R&D, natural product isolation, and synthetic chemistry laboratories for scalable purification of compounds ranging from milligram to multi-gram quantities. This system operates on standard reversed-phase, normal-phase, and ion-exchange chromatographic principles, utilizing high-pressure solvent delivery, manual or semi-automated sample introduction, UV/Vis absorbance detection, and analog/digital data acquisition via legacy workstation software. As a pre-owned but fully refurbished instrument, it retains the robust hydraulic architecture, stainless-steel flow path integrity, and mechanical stability characteristic of Varian’s late-1990s to early-2000s preparative systems—designed for reproducible fraction collection under variable gradient conditions.
Key Features
- Modular configuration including Varian PrepStar SD-1 solvent delivery module with dual-piston reciprocating pumps, capable of delivering stable flow rates up to 100 mL/min at pressures up to 400 bar (5,800 psi)
- Rainin Dynamax UV-1 absorbance detector with dual-wavelength capability (190–700 nm), fixed 10 mm pathlength flow cell, and analog output compatible with third-party integrators
- Manual Rheodyne-type injection valve (typically 20 µL–5 mL loop capacity) supporting precise, repeatable sample loading without automated autosampler dependency
- Integrated fraction collection capability via timed or peak-triggered external relay outputs, compatible with standard fraction collectors (e.g., Gilson FC204, ISCO Foxy R1)
- Refurbished status verified by SpectraLab Scientific: all high-pressure seals replaced, pump check valves ultrasonically cleaned and flow-tested, detector lamp intensity and baseline noise validated per ASTM E275-22 guidelines
Sample Compatibility & Compliance
The PrepStar system accommodates a broad range of column formats—from analytical-scale 10 mm ID columns to preparative 21.2 mm and 30 mm ID stainless-steel columns—enabling method transfer from analytical to prep scale. Mobile phases include water/acetonitrile, water/methanol, hexane/isopropanol, and buffered aqueous systems (pH 2–8). All wetted components are 316 stainless steel or PEEK-compatible; no internal Teflon tubing is present in the high-pressure path. While not certified for GMP production environments, the system meets general laboratory requirements for method development, impurity isolation, and reference standard purification under GLP-compliant workflows. Data acquisition via N2000 or Varian ProStar Workstation supports audit-trail-capable operation when configured with timestamped event logging and user-access controls—consistent with FDA 21 CFR Part 11 expectations for non-critical research use.
Software & Data Management
Two legacy software options are supported: the N2000 Chromatography Data System (CDS), a DOS-based platform offering basic peak integration, calibration curve generation, and report export to ASCII or Lotus 1-2-3 format; and the Varian ProStar Workstation (Windows NT/2000), providing enhanced method storage, sequence control, and rudimentary compliance features including electronic signatures and session logs. Neither platform supports modern cloud synchronization or API-driven automation, but both allow raw data (.RAW or .DAT) export for post-processing in third-party tools (e.g., OpenChrom, Chromeleon CDS). SpectraLab provides documented installation media, license keys (where applicable), and configuration files—all verified functional prior to shipment.
Applications
- Purification of synthetic intermediates and final APIs during route scouting and early-stage process development
- Isolation of bioactive constituents from plant extracts, fermentation broths, or combinatorial libraries
- Desalting and buffer exchange of peptides and oligonucleotides prior to MS analysis
- Recycling of chiral separations using polysaccharide-based preparative columns (e.g., Chiralpak AD-H, AS-H)
- Method optimization and scalability studies bridging analytical UHPLC and pilot-scale purification
FAQ
Is this system compatible with modern Windows operating systems?
The N2000 CDS requires DOS emulation (e.g., DOSBox) on Windows 10/11; ProStar Workstation runs natively on Windows 2000/XP but may require compatibility mode or virtualization (e.g., VMware Workstation with Windows XP SP3 guest) on newer hosts.
What maintenance documentation is included?
SpectraLab supplies full service records, refurbishment checklist, pressure test reports, detector wavelength accuracy verification, and original Varian service manuals (PDF and printed copies).
Can I upgrade the detector to a diode array or mass spectrometer interface?
The UV-1 detector has analog voltage output only; no native DAD or MS interface is supported. However, its analog signal can feed into modern third-party detectors or A/D converters for hybrid setups.
Are columns and consumables still available?
Yes—Varian-branded and generic preparative columns (C18, silica, amino, cyano) remain commercially available from multiple global suppliers; standard HPLC frits, seals, and pump pistons are interchangeable with Agilent 1100/1200 series parts.
Does the 6-month warranty cover labor and travel for on-site service?
Warranty covers parts and remote technical support only. On-site service is available at customer expense; SpectraLab maintains a network of certified field engineers across North America and Europe for optional extended service contracts.
