MPD P4 PC Ultraviolet-Visible Spectrophotometer
| Brand | MPD |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Instrument Architecture | Single-Beam |
| Detector Type | Silicon Photocell |
| Wavelength Range | 190–1100 nm |
| Wavelength Accuracy | ±0.5 nm |
| Spectral Bandwidth | 2 nm |
| Wavelength Scanning Mode | Motorized Automatic Wavelength Selection |
| Compliance | CE-marked, ISO/IEC 17025-compatible operation environment |
Overview
The MPD P4 PC Ultraviolet-Visible Spectrophotometer is a cost-optimized, single-beam optical instrument engineered for routine quantitative and qualitative analysis in academic teaching laboratories, quality control environments, and small-scale R&D settings. It operates on the fundamental principle of Beer–Lambert law-based absorbance measurement, where sample-induced attenuation of ultraviolet and visible light is quantified across a continuous spectral range from 190 nm to 1100 nm. The system integrates a dual-light-source configuration—deuterium lamp for UV region (190–350 nm) and tungsten-halogen lamp for visible/NIR region (350–1100 nm)—ensuring stable intensity output and seamless spectral coverage. Its fixed 2 nm spectral bandwidth provides sufficient resolution for standard applications such as concentration determination, purity assessment, and kinetic monitoring, while maintaining high photometric stability and signal-to-noise ratio under ambient laboratory conditions.
Key Features
- Single-beam optical architecture with manual cuvette positioning and motorized wavelength drive—designed for operational simplicity and mechanical robustness
- Dual-lamp system (deuterium + tungsten-halogen) with automatic lamp switching at ~350 nm, minimizing user intervention and ensuring optimal source utilization
- Wavelength accuracy of ±0.5 nm and repeatability ≤0.2 nm—validated against NIST-traceable holmium oxide and didymium reference filters
- Integrated silicon photocell detector with low dark current and linear response over OD 0–3.0, enabling reliable transmittance and absorbance measurements
- PC-controlled operation via USB interface; compatible with Windows-based acquisition software supporting method storage, calibration curve generation (linear/non-linear), and export to CSV/PDF
- CE-compliant electrical design and thermal management system suitable for continuous 8-hour daily operation in ISO Class 8 cleanroom-adjacent lab spaces
Sample Compatibility & Compliance
The P4 PC accommodates standard 10 mm pathlength rectangular quartz or glass cuvettes (also supports optional 5 mm, 20 mm, and 50 mm cells via adapter). It is routinely deployed for aqueous, organic, and mildly corrosive solvent-based samples—including buffered solutions, enzyme assays, dye formulations, and pharmaceutical intermediates. While not designed for GMP-regulated production release testing, its performance aligns with ASTM E275 and ISO 6059 for spectrophotometer verification protocols. Data integrity is supported through timestamped measurement logs and user-defined method IDs—enabling basic GLP-aligned documentation when paired with institutional SOPs. The instrument does not include 21 CFR Part 11-compliant electronic signature functionality but supports audit-ready manual record linkage via exported data files.
Software & Data Management
The included MPD SpectraView PC software provides full instrument control, real-time spectrum preview, fixed-wavelength kinetics, and multi-point calibration workflows. All acquired spectra are stored with metadata including date/time stamp, lamp status, wavelength setting, and operator ID (manually entered). Export formats include ASCII text (CSV), PNG image, and PDF report templates compliant with university lab notebook standards. No cloud synchronization or remote access capabilities are embedded; data remains local to the host PC—supporting IT security policies requiring air-gapped instrumentation networks. Software updates are distributed annually via secure download portal and require manual installation—consistent with ISO/IEC 17025 clause 5.9.2 on software validation control.
Applications
- Determination of nucleic acid concentration (A260) and purity (A260/A280, A260/A230) in molecular biology workflows
- Quantification of transition metal ions (e.g., Fe2+, Cu2+, Cr6+) using colorimetric reagents per APHA Standard Methods
- Stability-indicating assays for UV-absorbing excipients in generic drug formulation development
- Teaching laboratory experiments covering Lambert–Beer law verification, λmax identification, and molar absorptivity calculation
- Monitoring of enzymatic reaction rates (e.g., NADH oxidation at 340 nm) under controlled temperature conditions using external water-jacketed cuvette holders
FAQ
Is the P4 PC suitable for regulatory submissions under FDA or EMA guidelines?
No—this model lacks 21 CFR Part 11 compliance features (e.g., electronic signatures, audit trails, role-based access control) and is intended for non-GxP research and educational use only.
Can it measure samples with absorbance above 3.0 AU?
It is calibrated and validated up to 3.0 AU; measurements beyond this range exhibit nonlinear response and require dilution or pathlength reduction for quantitative accuracy.
Does it support scanning in derivative mode or time-resolved kinetics?
No—scanning is limited to absorbance/transmittance vs. wavelength; kinetic mode captures single-wavelength time-series only, without derivative computation or multi-wavelength synchronization.
What maintenance is required for long-term wavelength accuracy?
Annual verification using holmium oxide reference filter (NIST SRM 2034) is recommended; lamp replacement every 1,000 hours (deuterium) or 2,000 hours (tungsten) maintains specified spectral stability.
Is third-party software integration (e.g., LabArchives, ChemDraw) possible?
Data export in CSV format enables manual import into LIMS or ELN platforms; no native API or driver-level SDK is provided by MPD for automated integration.
