Beifen Ruili UV1801 Single-Beam Ultraviolet-Visible Spectrophotometer

Overview

The Beifen Ruili UV1801 is a single-beam ultraviolet-visible (UV-Vis) spectrophotometer engineered for precision absorbance and transmittance measurements across a broad spectral range of 190–1100 nm. Based on classical Beer–Lambert law principles, it employs a fixed optical path configuration with interchangeable slit-based monochromator optics to deliver stable photometric performance in routine and research-grade applications. Its single-beam architecture—while requiring manual reference blanking—offers cost-effective, robust operation ideal for high-throughput laboratories where instrument uptime, ease of maintenance, and long-term stability are prioritized over ultra-high-speed kinetics. The UV1801 integrates imported deuterium and tungsten-halogen lamps, ensuring continuous spectral coverage from deep UV through near-infrared, and utilizes a photodiode array detector for rapid signal acquisition and improved signal-to-noise ratio compared to traditional single-channel PMT systems.

Key Features

• Three selectable spectral bandwidths (1.0 nm, 2.0 nm, and 5.0 nm) — configurable at time of manufacture to align with pharmacopeial requirements (e.g., USP , EP 2.2.25, and ChP IV) for assay validation and impurity profiling.
• High-precision wavelength drive mechanism with ±0.5 nm accuracy and repeatability — verified per ISO 9001-compliant calibration protocols using NIST-traceable holmium oxide and didymium filters.
• Optimized optical design incorporating fused-silica optics and thermally stabilized lamp housings — minimizing thermal drift and enhancing baseline stability over extended measurement sessions (>4 hours).
• Large-capacity four-position sample holder accommodating cuvettes up to 100 mm pathlength — supporting low-concentration analysis in environmental and agricultural testing (e.g., nitrate quantification in soil extracts per FERTREC-certified workflows).
• Integrated 6-inch high-brightness blue LCD interface with intuitive menu navigation — enabling standalone operation without external PC, including storage of up to 500 spectra and method parameters in non-volatile memory.
• Flexible connectivity options: standard RS-232 port; optional RS-485 and USB interfaces — facilitating integration into LIMS environments and automated sample handling platforms, including compatibility with China Agricultural Academy’s standardized auto-sampler modules for soil nutrient analysis.

Sample Compatibility & Compliance

The UV1801 accommodates standard 10 mm square quartz or glass cuvettes, as well as custom macro-cuvettes (up to 100 mm pathlength) for highly diluted or turbid samples common in agrochemical, environmental water, and clinical serum analysis. Its stray light performance (≤0.05% T at 220 nm and 360 nm) meets the sensitivity thresholds required for trace-level nitrate detection in soil leachates and fertilizer formulations. Instrument design and firmware support GLP-compliant data integrity practices, including operator-defined audit trails for method changes and measurement logs. While not pre-certified for FDA 21 CFR Part 11, the system supports electronic record export (ASCII, CSV) and time-stamped measurement metadata—enabling laboratory-specific validation for regulated quality control workflows under ISO/IEC 17025 or GMP Annex 11 frameworks.

Software & Data Management

The UV1801 operates natively via its embedded firmware but is fully compatible with Beifen Ruili’s optional PC-based SpectraSoft™ application (Windows 10/11). This software enables advanced spectral processing—including first-, second-, and third-order derivative analysis, multi-wavelength kinetic monitoring, dual- and triple-wavelength ratio calculations, and DNA/protein concentration estimation using built-in extinction coefficient libraries (e.g., A₂₆₀/A₂₈₀ ratios). All raw absorbance spectra, calibration curves, and QC reports can be exported in vendor-neutral formats for integration into enterprise analytical data systems. Data retention includes automatic timestamping, user ID tagging, and session-level encryption—supporting traceability during internal audits or regulatory inspections.

Applications

• Agricultural testing: Quantitative determination of NO₃⁻, PO₄³⁻, NH₄⁺, and organic carbon in soil extracts per FERTREC Method F-UV-01.
• Pharmaceutical QC: Dissolution testing, content uniformity, and excipient interference screening in accordance with USP and .
• Environmental monitoring: COD, TOC surrogate assays, and heavy metal complexation studies using colorimetric reagents (e.g., 1,10-phenanthroline for Fe²⁺).
• Food & beverage: Color index (CIE L*a*b*), anthocyanin profiling, and preservative (e.g., benzoate, sorbate) quantification.
• Academic teaching: Fundamentals of spectroscopy, enzyme kinetics (e.g., NADH oxidation), and ligand-binding isotherms in undergraduate biochemistry labs.

FAQ

Is the UV1801 compliant with pharmacopeial wavelength accuracy requirements?
Yes — its ±0.5 nm wavelength accuracy and repeatability meet the specifications outlined in USP , EP 2.2.25, and Chinese Pharmacopoeia (ChP) Section IV for UV-Vis spectrophotometers used in quantitative analysis.
Can the instrument perform kinetic measurements without a PC?
No — time-scan mode requires connection to SpectraSoft™ software; however, fixed-time point absorbance readings are fully supported via the onboard interface.
What is the maximum pathlength supported by the standard sample holder?
The standard four-cell holder accepts cuvettes up to 100 mm pathlength; custom holders for flow cells or microvolume adapters are available upon request.
Does the UV1801 support GLP audit trail functionality?
It records user ID, date/time stamps, and method parameters in non-volatile memory; full electronic signature and change-control features require PC-based software validation per laboratory SOP.
Are NIST-traceable calibration standards included with the instrument?
No — holmium oxide and didymium filters for wavelength verification, as well as potassium dichromate solutions for photometric accuracy checks, are supplied separately as optional accessories.