Luban Instruments M700S Dual-Beam UV-Vis Spectrophotometer
| Brand | Yoke |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Original Equipment Manufacturer (OEM) |
| Product Category | Domestic |
| Model | M700S |
| Instrument Architecture | Dual-Beam |
| Detector Type | Photodiode Array (PDA) |
| Wavelength Range | 190–1100 nm |
| Automation Level | Automatic Wavelength Scanning |
| Display | 11-inch 2.8K Resolution Tablet PC |
| Light Sources | Deuterium Lamp & Tungsten-Halogen Lamp |
| Photometric Range | –4 to +4 Abs |
| Photometric Resolution | 0.00001 Abs |
Overview
The Luban Instruments M700S Dual-Beam UV-Vis Spectrophotometer is an engineered analytical platform designed for high-fidelity absorbance and transmittance measurements across the ultraviolet, visible, and near-infrared spectral regions (190–1100 nm). Built upon a true dual-beam optical architecture, the instrument continuously compares sample and reference beam intensities in real time—minimizing drift caused by source instability or environmental fluctuations. This design ensures exceptional baseline stability and photometric reproducibility, critical for quantitative analysis in regulated environments. The system integrates a deuterium lamp for UV output (190–350 nm) and a tungsten-halogen lamp for visible/NIR coverage (350–1100 nm), with automatic lamp switching and spectral continuity validation. Its photodiode array (PDA) detector enables rapid full-spectrum acquisition without mechanical scanning, supporting both kinetic and multi-wavelength measurement paradigms with sub-second spectral response.
Key Features
- Dual-beam optical path with real-time reference compensation, delivering long-term photometric stability (drift < ±0.001 Abs/h at 500 nm)
- 11-inch 2.8K-resolution tablet interface with auto-switching bilingual (English/Chinese) UI, Bluetooth-enabled wireless connectivity, and intuitive multi-mode navigation
- Photometric resolution of 0.00001 Abs across a dynamic range of –4 to +4 Abs, validated per ISO 6223 and ASTM E275 standards
- Integrated firmware diagnostics with configurable email/SMS alerts for hardware anomalies, calibration deviations, or out-of-spec results
- High-speed spectral acquisition (≤100 ms per full 190–1100 nm scan) enabled by PDA readout and optimized signal-processing algorithms
- Modular hardware architecture supporting field-upgradable accessories without recalibration
Sample Compatibility & Compliance
The M700S accommodates liquid, solid, and thin-film samples through a comprehensive suite of ISO-compliant accessories: automated 8-position cuvette changers (10 mm pathlength standard), temperature-controlled cell holders (±0.1 °C stability), integrating spheres for diffuse reflectance (ASTM E1331), variable-pathlength cells (0.1–100 mm), and adjustable-angle solid-sample stages. All optical components meet IEC 61000-4 electromagnetic compatibility requirements. The instrument supports audit-trail-enabled operation under GLP and GMP frameworks; software logs all user actions, method parameters, and raw spectral data with timestamped digital signatures—fully compliant with FDA 21 CFR Part 11 when deployed with validated network authentication and electronic signature modules.
Software & Data Management
The embedded SpectraView™ software provides native support for spectral preprocessing (baseline correction, smoothing, derivative transformation), quantitative analysis (single/multi-point calibration, Beer-Lambert modeling), kinetic profiling (time-resolved absorbance tracking), and 3D contour mapping (wavelength × time × absorbance). Raw data export formats include CSV, JCAMP-DX, and XML, ensuring interoperability with LIMS platforms (e.g., LabWare, Thermo Fisher SampleManager) and statistical packages (MATLAB, Python pandas). Data integrity is reinforced via SHA-256 hashing of all acquired spectra and automatic backup to encrypted internal storage or network-mounted drives.
Applications
- Pharmaceutical QA/QC: Dissolution testing, excipient interference screening, and USP endotoxin assay validation
- Life sciences: Nucleic acid quantification (A260/A280 ratios), protein concentration (Bradford/Lowry assays), enzyme kinetics (NADH/NADPH monitoring)
- Environmental analysis: Nitrate/nitrite detection in water (EPA Method 353.2), COD determination, heavy metal complexation studies
- Materials science: Bandgap estimation of semiconductor nanoparticles, thin-film thickness modeling via interference fringes, polymer degradation kinetics
- Food & beverage: Color index (CIE L*a*b*) validation, antioxidant capacity (FRAP assay), adulterant screening (e.g., melamine in milk)
FAQ
Does the M700S support compliance with pharmacopeial methods (e.g., USP, EP)?
Yes—the instrument’s wavelength accuracy (±0.5 nm), photometric linearity (R² > 0.9999 over 0–3 Abs), and stray light performance (< 0.05% at 220 nm) meet USP , EP 2.2.25, and JP 17 specifications.
Can the tablet interface be locked into English-only mode for international labs?
Yes—language preference is configurable per user profile and persists across reboots; administrator mode allows disabling language switching entirely.
Is the PDA detector thermally stabilized?
Yes—the detector housing incorporates active temperature regulation (±0.2 °C) to suppress dark-current drift during extended scans or ambient temperature fluctuations.
What validation documentation is provided with the system?
Each unit ships with a Factory Calibration Certificate traceable to NIM (China National Institute of Metrology), IQ/OQ protocols, and a complete set of test reports aligned with ISO/IEC 17025 requirements.
How is firmware updated, and does it require external service?
Firmware updates are delivered via secure HTTPS download and installed locally using the tablet UI; no vendor technician visit is required for routine version upgrades.
