Shanghai Spectrum SP-756P UV-Vis Spectrophotometer

Overview

The Shanghai Spectrum SP-756P UV-Vis Spectrophotometer is a dual-beam, ratio-monitoring spectrophotometer engineered for high reproducibility and long-term photometric stability in routine and research-grade quantitative analysis. Unlike single-beam architectures, the SP-756P employs an optical design where sample and reference beams are simultaneously directed onto adjacent segments of a fixed photodiode array (PDA) detector. This real-time beam-ratio correction compensates for source intensity drift, lamp aging, and environmental fluctuations—critical for extended kinetic measurements or multi-sample batch analysis under GLP-compliant workflows. The instrument operates across a broad spectral range of 190–1100 nm, covering deep UV absorption bands (e.g., nucleic acid A260/A280, aromatic amino acids) through the visible region (e.g., colorimetric enzyme assays, dye quantification) and into the near-infrared (e.g., semiconductor thin-film characterization). Its 2 nm nominal spectral bandwidth ensures adequate resolution for most molecular absorption features without sacrificing signal-to-noise ratio—a balanced specification aligned with ISO 9001-certified QC laboratories and academic teaching labs requiring ASTM E275 and ISO 6223 traceability.

Key Features

• Dual-beam optical path with real-time ratio monitoring to eliminate baseline drift during time-resolved absorbance measurements
• High-stability deuterium/tungsten-halogen lamp combination enabling continuous operation over 1,000 hours with minimal intensity decay
• Photodiode array (PDA) detector offering full-spectrum acquisition in <100 ms per scan—enabling rapid kinetics and spectral library matching
• Motorized automatic wavelength drive with encoder feedback for repeatable positioning accuracy of ±0.5 nm (calibrated against NIST-traceable holmium oxide and didymium filters)
• Integrated cuvette holder accommodating standard 10 mm square cells, as well as optional 5 mm, 20 mm, and micro-volume adapters (not included)
• Embedded firmware supporting direct USB storage export of absorbance, transmittance, and concentration data in CSV and ASCII formats

Sample Compatibility & Compliance

The SP-756P accommodates liquid samples in quartz, fused silica, or high-transmission glass cuvettes (UV-grade for λ < 350 nm), as well as solid transmission films and thin-layer chromatography plates via optional reflectance accessories. It complies with key international standards governing analytical instrumentation, including ISO/IEC 17025:2017 clause 5.5.2 (instrument verification), USP (UV-Vis spectrophotometers for pharmaceutical testing), and CLSI EP10-A3 (evaluation protocol for precision and linearity). While not inherently 21 CFR Part 11 compliant out-of-the-box, its audit trail-capable software version (v3.2+) supports electronic signature logging, user access levels, and immutable data archiving when deployed on validated Windows OS environments—meeting GMP Annex 11 and WHO TRS 992 requirements for regulated QC labs.

Software & Data Management

The instrument ships with SpectrumScan Pro v3.2, a Windows-based application supporting method creation, calibration curve fitting (linear, quadratic, cubic, and non-linear Langmuir models), spectral subtraction, derivative spectroscopy, and peak integration. All raw spectra and processed results are stored with embedded metadata: date/time stamp, operator ID, instrument serial number, lamp hours, and calibration status. The software generates PDF reports conforming to ISO/IEC 17025 documentation requirements and exports structured data compatible with LIMS platforms via ODBC drivers. Audit trails record all parameter modifications, calibration events, and data deletions—retained for ≥36 months unless purged under formal data retention policy.

Applications

• Pharmaceutical QC: Assay of active pharmaceutical ingredients (APIs), excipient purity screening, dissolution profile analysis per USP
• Food & Beverage: Quantification of nitrites, sulfites, anthocyanins, and carotenoids; detection of adulterants via spectral fingerprinting
• Clinical Biochemistry: Enzymatic assays (ALT, AST, ALP), total protein (Biuret/Lowry), bilirubin, and hemoglobin derivatives
• Environmental Monitoring: Nitrate/nitrite, phosphate, COD, and heavy metal chelate complexes (e.g., Fe-phenanthroline)
• Academic Research: Teaching Beer-Lambert law fundamentals, ligand binding studies, polymer degradation kinetics, and nanoparticle plasmon resonance analysis

FAQ

Is the SP-756P suitable for GLP-regulated laboratories?
Yes—when operated with SpectrumScan Pro v3.2+ and configured with role-based user accounts, electronic signatures, and audit-trail-enabled data storage, it satisfies core GLP principles per OECD Series on Principles of Good Laboratory Practice.
What validation documentation is supplied with the instrument?
Each unit includes a Factory Calibration Certificate (traceable to NIST SRM 2034 and 2035), IQ/OQ protocol templates, and a Performance Verification Report demonstrating wavelength accuracy, photometric linearity (0–3.0 A), and stray light compliance.
Can the SP-756P perform kinetic measurements?
Yes—its PDA-based architecture enables up to 10 full-spectrum scans per second, supporting enzyme reaction monitoring, oxidation/reduction kinetics, and photochemical degradation studies.
Does it support fiber-optic probes or flow cells?
Not natively—but third-party SMA905-compatible fiber-optic interfaces and 1–5 mL flow-through cells can be integrated using the optional external trigger port and custom cuvette holder brackets.
How often does the instrument require recalibration?
Wavelength calibration is recommended annually or after lamp replacement; photometric calibration using neutral density filters is advised before each high-precision assay batch.