Persee TU-1810 Used Double-Beam UV-Vis Spectrophotometer
| Brand | Persee |
|---|---|
| Origin | Beijing, China |
| Model | TU-1810 |
| Optical System | Double-beam ratio-monitoring |
| Detector Type | Photodiode Array |
| Wavelength Range | 190–1100 nm |
| Wavelength Accuracy | ±0.3 nm (auto-calibrated at startup) |
| Spectral Bandwidth | 2 nm (fixed), optional 0.5/1.0/2.0/5.0 nm (variable slit) |
| Stray Light | ≤0.2% (at 220 nm, NaI |
| Absorbance Accuracy | ±0.002 Abs (0–0.5 Abs), ±0.004 Abs (0.5–1.0 Abs), ±0.3% T |
| Absorbance Repeatability | ≤0.001 Abs (0–0.5 Abs), ≤0.002 Abs (0.5–1.0 Abs), ≤0.15% T |
| Baseline Flatness | ±0.001 Abs |
| Drift | ≤0.2%/h (at 500 nm, after 2 h warm-up) |
| Dimensions | 530 × 430 × 240 mm |
| Weight | 25 kg |
Overview
The Persee TU-1810 is a used double-beam UV-Vis spectrophotometer engineered for precision absorbance and transmittance measurements across the ultraviolet, visible, and near-infrared spectral regions (190–1100 nm). Its optical architecture employs a ratio-monitoring double-beam design, which continuously compares sample and reference beam intensities to compensate for source fluctuation, lamp aging, and electronic drift—ensuring high photometric stability and measurement reproducibility over extended operation. The instrument utilizes a photodiode array (PDA) detector for rapid, simultaneous spectral acquisition without mechanical scanning, enabling efficient kinetic studies, spectral scanning, and multi-wavelength quantitation. Wavelength calibration is performed automatically at startup using internal reference peaks, delivering ±0.3 nm accuracy traceable to NIST-traceable standards. With a fixed 2 nm spectral bandwidth and optional variable slits (0.5/1.0/2.0/5.0 nm), the TU-1810 balances resolution and signal-to-noise ratio for diverse analytical requirements—from routine QC assays to method development in regulated environments.
Key Features
- Double-beam ratio-monitoring optical system for real-time compensation of intensity drift and environmental variability
- Photodiode array detector enabling full-spectrum acquisition in <1 second with no moving grating components
- Auto-wavelength calibration at power-on, eliminating manual wavelength verification prior to analysis
- Modular lamp design: plug-in tungsten and deuterium lamps require no optical realignment during replacement
- Integrated 8-position automatic sample changer (optional) supporting sequential analysis of up to 7 samples in pesticide residue screening workflows
- GLP-compliant software features including user access control, audit trail logging, electronic signatures, and data integrity safeguards aligned with FDA 21 CFR Part 11 expectations
- Baseline flatness of ±0.001 Abs and photometric drift ≤0.2%/h (after 2 h warm-up) ensure long-duration stability for kinetic and time-course experiments
Sample Compatibility & Compliance
The TU-1810 accommodates standard 10 mm pathlength cuvettes (quartz, glass, or plastic) and supports accessory integration—including microvolume holders, temperature-controlled cells, and fiber-optic probes—for specialized applications. It complies with core international performance standards for UV-Vis instrumentation, including ISO 9001 manufacturing quality systems and ASTM E275–22 (Standard Practices for Describing and Measuring Performance of UV-Vis Spectrophotometers). Its stray light specification (≤0.2% at 220 nm and 360 nm) meets USP requirements for pharmaceutical assay validation. When operated with validated software modules and documented instrument qualification protocols (IQ/OQ/PQ), the system supports GLP and GMP laboratory environments—particularly in environmental testing labs (EPA Method 415.3), pharmaceutical QC (USP , ), and food safety laboratories (AOAC Official Methods).
Software & Data Management
The bundled PC-based software provides comprehensive control and analysis functionality: photometric mode (A/T/%T), quantitative analysis (single/multi-point calibration, equation-based methods), spectral scanning (full-range or user-defined windows), kinetic time scans, and DNA/protein concentration calculation using built-in extinction coefficients. Advanced capabilities include 3D spectral mapping, derivative spectroscopy, peak identification, and spectral subtraction. All data files are saved in proprietary but exportable formats (CSV, TXT, XML), with embedded metadata (date/time, operator ID, instrument serial number, method parameters). Audit trails record every critical action—including method modification, calibration event, and data export—with immutable timestamps. Software configuration adheres to ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available), facilitating regulatory inspection readiness.
Applications
The TU-1810 serves as a foundational analytical tool across multiple regulated and research-intensive domains. In pharmaceutical development, it performs raw material identification, excipient compatibility studies, and dissolution profile monitoring per USP . Environmental laboratories apply it to quantify nitrate, phosphate, heavy metals (via complexometric assays), and organic pollutants (e.g., phenols, PAHs) per EPA and ISO water quality standards. Food and agricultural labs use its rapid multi-sample capability for pesticide residue screening (e.g., organophosphates via enzymatic inhibition assays) and nutrient profiling (vitamins, pigments, antioxidants). In academic and biotech settings, it supports nucleic acid quantification (A₂₆₀/A₂₈₀ ratios), protein purity assessment, enzyme kinetics (initial rate determination), and ligand-binding studies requiring precise wavelength selection and low-noise absorbance detection.
FAQ
Is this unit supplied with valid calibration documentation?
Yes—each refurbished TU-1810 undergoes full optical and electronic recalibration prior to shipment, accompanied by a Certificate of Calibration traceable to national standards.
Can the instrument be qualified for GMP use?
Yes—documentation packages (IQ/OQ templates), validation support files, and 21 CFR Part 11-compliant software configurations are available upon request.
What lamp lifetime can be expected after refurbishment?
Deuterium lamps typically deliver ≥1,000 hours; tungsten lamps ≥2,000 hours—both verified during pre-shipment functional testing.
Does the system support third-party LIMS integration?
Yes—via ASCII-based data export protocols and configurable CSV output templates compatible with major LIMS platforms (e.g., LabWare, STARLIMS, Thermo Fisher SampleManager).
Are service contracts and spare parts available post-purchase?
Yes—extended warranty, preventive maintenance plans, and genuine Persee replacement lamps, cuvettes, and fuses are supported globally through authorized technical partners.
