AOE UV-1900 Scanning Ultraviolet-Visible Spectrophotometer

Overview

The AOE UV-1900 Scanning Ultraviolet-Visible Spectrophotometer is a precision single-beam optical instrument engineered for routine quantitative and qualitative analysis in academic laboratories, quality control environments, and industrial R&D settings. It operates on the fundamental principle of Beer–Lambert law-based absorbance measurement, utilizing a high-efficiency 1200-line/mm holographic grating to resolve spectral features across a broad 190–1100 nm wavelength range. While configured as a single-beam system for cost-effective deployment, it incorporates dual-beam ratio monitoring—enabling real-time compensation for source intensity drift and detector sensitivity variation without requiring a physical reference beam path. This architecture delivers high reproducibility in absorbance measurements while maintaining mechanical simplicity and long-term optical stability.

Key Features

• Motorized automatic wavelength scanning with ±0.3 nm accuracy and ≤0.2 nm repeatability—ensuring traceable, consistent spectral acquisition across daily operation.
• 1.8 nm spectral bandwidth optimized for balance between resolution and signal-to-noise ratio in standard UV-Vis applications including nucleic acid quantification, enzyme kinetics, and dye concentration profiling.
• Integrated 480 × 272 pixel, 65K-color TFT LCD display with intuitive graphical interface—supporting real-time spectrum visualization, multi-curve overlay, and direct parameter adjustment without external PC dependency.
• Onboard data management: stores up to 240 independent calibration curves, each accommodating 240 absorbance or transmittance data points—ideal for method-driven workflows in regulated environments.
• Dual USB 2.0 ports: one dedicated to PCL-compatible A4 thermal or inkjet printers (direct report generation), the other for secure data export to USB mass storage devices in CSV or proprietary binary format.
• Firmware upgrade capability via USB 1.0 port using authenticated update packages downloaded from AOE’s official support portal—ensuring compliance with evolving metrological requirements and software validation protocols.

Sample Compatibility & Compliance

The UV-1900 accommodates standard 10 mm square quartz or glass cuvettes (pathlength: 10 mm), with optional accessories supporting microvolume adapters (down to 50 µL) and temperature-controlled cell holders (±0.1 °C stability). Its optical performance meets key international benchmarks: stray light ≤0.04% T at 360 nm satisfies ASTM E275–22 criteria for spectrophotometric purity assessment; wavelength accuracy aligns with ISO 8579-1:2020 recommendations for analytical instrumentation verification. The instrument carries CE marking per EU Directive 2014/30/EU (EMC) and 2014/35/EU (LVD); its manufacturing process is certified to ISO 9001:2015. The CMC license confirms conformity with the People’s Republic of China’s mandatory metrological verification regime. RoHS compliance ensures restricted substance levels meet Annex II thresholds for lead, mercury, cadmium, and hexavalent chromium.

Software & Data Management

The bundled AOE Basic Spectroscopy Suite is a validated Windows-compatible application registered with the China National Copyright Administration (Certificate No. 2021SRxxxxxx), providing full audit trail functionality—including user login logs, method version history, and timestamped raw data export. All measurement files include embedded metadata: instrument ID, operator name, date/time stamp, calibration status flag, and environmental conditions (if connected to optional ambient sensor). Data exports comply with GLP/GMP documentation standards: CSV outputs are structured for direct import into LIMS platforms or statistical analysis tools (e.g., JMP, Minitab). The software supports 21 CFR Part 11-compliant electronic signatures when deployed with appropriate IT infrastructure and access controls.

Applications

• Quantitative analysis of pharmaceutical actives (e.g., paracetamol, aspirin) per USP and EP 2.2.25 monographs.
• Protein and nucleic acid concentration determination using A₂₈₀/A₂₆₀ ratios and extinction coefficient calculations.
• Chemical kinetics studies involving time-resolved absorbance tracking at fixed wavelengths or full-spectrum acquisition.
• Colorimetric assay validation (e.g., Bradford, Lowry, BCA) in biotechnology QC labs.
• Water quality testing for nitrate, phosphate, and heavy metal complexes (e.g., Cr(VI) diphenylcarbazide method).
• Educational use in undergraduate chemistry and biochemistry curricula for spectral interpretation and calibration curve construction.

FAQ

Is the UV-1900 compliant with FDA 21 CFR Part 11 requirements?
The instrument itself is not Part 11-certified out-of-the-box; however, when operated with the AOE Basic software under validated IT governance (user access controls, audit trail activation, electronic signature configuration), it supports implementation of Part 11-compliant workflows.

Can the UV-1900 perform kinetic or multi-wavelength scanning?
Yes—its firmware supports time-scan mode (up to 999 seconds) and multi-point wavelength measurement (up to 240 discrete wavelengths per run), both fully programmable via the onboard interface or Basic software.

What validation documentation is provided with the instrument?
Each unit ships with a Factory Calibration Certificate (traceable to NIM, China), IQ/OQ protocol templates, and a complete set of operational qualification test scripts aligned with ISO/IEC 17025:2017 Annex A.3 guidelines.

Does the photometric accuracy meet pharmacopeial standards?
Yes—absorbance accuracy is verified at 0.5, 1.0, and 2.0 AU using NIST-traceable neutral density filters, satisfying USP and EP 2.2.25 acceptance criteria for photometric linearity and repeatability.