Mapada UV-1600 Ultraviolet-Visible Spectrophotometer
| Brand | Mapada |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Instrument Architecture | Pseudo-Double-Beam |
| Detector Type | Silicon Photodiode |
| Wavelength Range | 190–1100 nm |
| Wavelength Accuracy | ±0.5 nm |
| Spectral Bandwidth | 4 nm |
| Wavelength Setting | Motorized Auto-Scanning |
| Display | 128×64 Dot-Matrix LCD |
| Photometric Range | 0–200% T, –0.3 to 3.0 A |
| Light Sources | Imported Long-Life Tungsten Lamp & Deuterium Lamp |
| Sample Compartment Dimensions | Accommodates Cuvettes from 5 mm to 100 mm Pathlength |
| Interface | USB Port (Data Export), Parallel Port (Printer Output) |
| Power Supply | AC 220 V / 50 Hz or AC 110 V / 60 Hz |
| Dimensions (W×D×H) | 490 × 360 × 240 mm |
| Net Weight | 14 kg |
Overview
The Mapada UV-1600 Ultraviolet-Visible Spectrophotometer is a precision optical instrument engineered for routine and research-grade absorbance, transmittance, and concentration measurements across the ultraviolet and visible spectrum (190–1100 nm). Based on pseudo-double-beam optical architecture, it mitigates baseline drift caused by source intensity fluctuations and detector thermal noise—enabling stable photometric performance without requiring frequent manual zeroing. The system employs a high-efficiency 1200 lines/mm holographic grating for spectral dispersion and utilizes imported silicon photodiodes as detectors, delivering consistent linearity and low stray light characteristics essential for quantitative analysis in compliance with ISO 6425 and ASTM E275 standards. Its motorized wavelength drive ensures repeatable positioning accuracy of ±0.5 nm, while automatic lamp switching between deuterium (UV) and tungsten (VIS/NIR) sources maintains optimal signal-to-noise ratio across the full spectral range.
Key Features
- Pseudo-double-beam optical design with real-time reference beam correction for enhanced baseline stability and long-term measurement reproducibility
- Motorized auto-wavelength scanning with ±0.5 nm accuracy and 4 nm spectral bandwidth—optimized for regulatory-compliant UV-Vis assays
- Integrated dual-lamp system: imported long-life deuterium lamp (190–350 nm) and tungsten-halogen lamp (320–1100 nm), automatically selected based on set wavelength
- Large 128×64 dot-matrix LCD display supporting direct visualization of calibration curves, kinetic time-scan plots, and up to 200 stored data points
- Expandable memory capacity: stores up to 100 user-defined standard curves and 200 measurement datasets onboard
- Wide sample compartment accommodating cuvettes with path lengths from 5 mm to 100 mm—including standard 10 mm, micro-volume, and flow-cell configurations
- Plug-and-play lamp module design: socket-mounted deuterium and tungsten lamps require no optical realignment after replacement
- Dual-output interface: USB port for direct connection to Windows-based PCs; parallel port for legacy printer integration
- Comprehensive internal diagnostics: real-time monitoring of lamp operating hours, voltage stability, and detector response drift
Sample Compatibility & Compliance
The UV-1600 supports a broad range of liquid-phase samples in quartz, fused silica, or high-transmission glass cuvettes. Its adaptable sample chamber accepts standard rectangular cells (10 mm pathlength), semi-micro (5 mm), macro (50 mm), and ultra-long-path (100 mm) formats—enabling applications from trace-level nucleic acid quantification to high-absorbance industrial dye analysis. The instrument meets core requirements for laboratory quality systems under ISO/IEC 17025, including documented wavelength verification protocols, photometric linearity validation (per ASTM E169), and operational qualification (OQ) support documentation. While not inherently 21 CFR Part 11 compliant, its data export architecture enables secure integration into validated LIMS or ELN platforms when paired with appropriate audit-trail software layers.
Software & Data Management
The UV-1600 operates natively via its embedded firmware but is fully compatible with Mapada’s optional ScanPro professional software suite for Windows OS. This application provides full spectral control—including photometric mode (T/A/C/E), quantitative analysis with multi-point calibration curve fitting (linear, quadratic, cubic), full-range spectral scanning (190–1100 nm), time-based kinetic assays (0.1–9999 s intervals), multi-wavelength monitoring, and dedicated DNA/protein analysis modules (using ε260, ε280, and A260/280 algorithms). All acquired spectra and results are exportable in CSV, TXT, or XML formats, supporting traceability and secondary analysis in MATLAB, OriginLab, or statistical packages. USB connectivity allows direct firmware updates and configuration backup/restore operations.
Applications
This spectrophotometer serves critical roles in academic teaching laboratories, QC/QA environments, environmental testing labs, and pharmaceutical R&D settings. Typical use cases include: determination of molar absorptivity coefficients for new synthetic compounds; verification of buffer composition and pH-dependent spectral shifts; quantification of protein concentration via Bradford or BCA assays; assessment of enzyme kinetics using NADH/NADPH oxidation/reduction at 340 nm; evaluation of nanoparticle suspension stability via time-resolved absorbance monitoring; and routine water quality analysis (e.g., nitrate at 220 nm, phosphate via molybdenum blue method at 880 nm). Its robustness and ease of operation make it suitable for GLP-regulated workflows where instrument qualification records and SOP adherence are mandatory.
FAQ
What is the optical design principle of the UV-1600, and how does it differ from true double-beam instruments?
The UV-1600 uses a pseudo-double-beam architecture: a single light beam is rapidly alternated between sample and reference positions via a rotating mirror. This achieves temporal referencing—reducing drift effects—without the complexity and cost of dual optical paths.
Does the instrument support GMP/GLP-compliant data integrity requirements?
Out-of-the-box, it provides timestamped data export and basic audit logs. Full 21 CFR Part 11 compliance requires integration with validated third-party software for electronic signatures, audit trails, and role-based access control.
Can I perform kinetic measurements over extended time periods?
Yes—the built-in kinetic mode supports acquisition intervals from 0.1 seconds to 9999 seconds, with up to 2000 data points per run and automatic curve fitting for first-order or zero-order reaction modeling.
Is the wavelength calibration traceable to NIST standards?
Factory calibration is performed using certified holmium oxide and didymium oxide filters. Users may verify and adjust wavelength accuracy using these or other NIST-traceable standards per ISO 17025 Section 6.5.
What maintenance is required for long-term reliability?
Routine cleaning of the sample compartment and cuvette holder is recommended. Lamp lifetime exceeds 2000 hours; replacement is tool-free and optically self-aligning. Annual verification of photometric linearity and stray light performance is advised for regulated environments.
