BUCHI NIRFlex N-500 Fourier Transform Near-Infrared Spectrometer
| Brand | BUCHI |
|---|---|
| Origin | Switzerland |
| Manufacturer Type | Original Equipment Manufacturer (OEM) |
| Product Category | Imported Laboratory Instrument |
| Model | NIRFlex N-500 |
| Instrument Principle | Fourier Transform (FT-NIR) |
| Wavelength Range | 10000–4000 cm⁻¹ (1000–2500 nm) |
| Scan Speed | 2–4 scans/sec |
| Data Sampling Interval | 4 cm⁻¹ |
| Measurement Modes | Diffuse Reflectance / Transmission / Transflection |
| Chemometrics Software | NIRCal |
| Interferometer Type | TeO₂ Wedge Polarization Interferometer |
| Spectral Resolution | 8 cm⁻¹ |
| Wavenumber Accuracy | ±0.2 cm⁻¹ |
| SNR | 10,000 (at 16 scans) |
| Detector | Temperature-Controlled InGaAs |
| A/D Converter | 24-bit |
| Light Source Lifetime | 12,000 h (dual tungsten halogen lamps) |
| Dimensions | 450 × 550 × 250 mm |
| Weight | 25 kg |
| Operating Environment | 5–35 °C, RH < 80% at ≤31 °C (derating to 67% at 35 °C), altitude ≤2500 m |
| Power Supply | 100–230 V ±10%, 50/60 Hz, <350 W |
| Communication Interface | Ethernet (TCP/IP), 100 Mbit/s |
| IP Rating | IP20 |
| Pollution Degree | 2 |
| Overvoltage Category | II |
Overview
The BUCHI NIRFlex N-500 is a high-performance, research-grade Fourier Transform Near-Infrared (FT-NIR) spectrometer engineered for precision, stability, and regulatory compliance in regulated laboratory and quality control environments. Based on Michelson-type interferometry with a robust TeO₂ wedge polarization interferometer, the N-500 delivers exceptional optical throughput and mechanical resilience—enabling reliable operation not only in central laboratories but also in near-line and controlled production settings. Its spectral coverage of 10000–4000 cm⁻¹ (1000–2500 nm) supports broad-spectrum molecular fingerprinting of organic functional groups (e.g., O–H, C–H, N–H), making it suitable for quantitative and qualitative analysis across raw material verification, in-process monitoring, and final product release testing. The instrument’s 8 cm⁻¹ resolution, ±0.2 cm⁻¹ wavenumber accuracy, and >10,000 signal-to-noise ratio (at 16 co-added scans) meet the performance thresholds required for method validation under ICH Q2(R2), USP , and ASTM E1655 standards.
Key Features
- TeO₂ wedge polarization interferometer: Eliminates moving mirrors and alignment sensitivity; provides intrinsic vibration resistance and long-term spectral stability—critical for GMP-compliant installations where environmental perturbations are unavoidable.
- Temperature-stabilized InGaAs detector: Ensures consistent responsivity and minimizes thermal drift over extended acquisition periods, supporting reproducible calibration transfer between instruments and labs.
- Integrated reference wheel with built-in NIST-traceable standards: Enables automated system suitability testing (SST) per USP and EU GMP Annex 19, fulfilling GLP/GMP requirements for routine performance verification without external hardware.
- Modular optical path design: Supports rapid interchange of sampling interfaces—including fiber-optic probes (reflectance/transmission), integrating spheres, flow cells, and temperature-controlled cuvette holders—without realignment or recalibration.
- 24-bit analog-to-digital conversion and dual 6000-hour tungsten-halogen sources: Delivers wide dynamic range (>2 AU) and operational continuity, reducing downtime associated with lamp replacement and signal saturation.
- Ethernet-based TCP/IP communication: Allows secure remote instrument control, centralized data acquisition, and integration into LIMS or MES platforms via standard protocols—fully compatible with FDA 21 CFR Part 11 audit trail and electronic signature requirements when deployed with validated NIRWare and NIRCal configurations.
Sample Compatibility & Compliance
The NIRFlex N-500 accommodates heterogeneous sample formats without destructive preparation: intact tablets, granules, powders, pastes, emulsions, and clear-to-turbid liquids. Its diffuse reflectance, transmission, and transflection capabilities—enabled by interchangeable accessories—support compliance with pharmacopeial methods (e.g., USP , Ph. Eur. 2.2.40) and industrial standards (e.g., ISO 12099 for animal feed, AOAC 992.17 for grain moisture). All optical components conform to IEC 61010-1 safety requirements; the system is CE-marked and designed for Class II overvoltage environments. Environmental specifications (5–35 °C, ≤80% RH at ≤31 °C) align with ISO/IEC 17025 clause 5.3.2 for laboratory condition control. For pharmaceutical applications, optional IQ/OQ/PQ documentation packages and 21 CFR Part 11-compliant software configurations are available upon request.
Software & Data Management
NIRWare serves as the primary instrument control and acquisition platform—providing intuitive method setup, real-time spectral preview, and automated SST execution. NIRCal, the embedded chemometrics suite, supports full PLS, PCR, and PCA modeling with cross-validation, outlier detection, and model transfer tools compliant with ASTM E1655 guidelines. Both applications operate within a modular architecture: base licenses cover routine QC workflows; add-on modules enable advanced features including multi-batch trending, PAT dashboard integration, and electronic batch record (EBR) export. All software versions undergo rigorous version control, with documented change history and validation support files provided for regulated users. Audit trails, user access levels, and electronic signatures are fully configurable to satisfy ALCOA+ data integrity principles.
Applications
- Pharmaceuticals: Active pharmaceutical ingredient (API) assay, blend uniformity assessment, moisture content in lyophilized powders, polymorph identification in solid dosage forms.
- Food & Feed: Protein/fat/moisture quantification in cereals, dairy powders, and pet food; authenticity screening (e.g., adulteration detection in olive oil or honey).
- Chemicals: Solvent purity verification, polymer composition analysis (e.g., ethylene-propylene ratio), catalyst activity monitoring in batch reactors.
- Agrochemicals: Fertilizer nutrient profiling (N-P-K), pesticide residue screening in plant tissue extracts.
- Academic Research: Reaction kinetics studies via time-resolved NIR, hydrogen bonding dynamics in biomolecular systems, non-invasive tissue characterization.
FAQ
Is the NIRFlex N-500 compliant with 21 CFR Part 11?
Yes—when deployed with validated NIRWare and NIRCal configurations, including enabled audit trail logging, role-based user authentication, and electronic signature workflows.
Can calibration models be transferred between multiple N-500 units?
Yes—the polarization interferometer design and temperature-stabilized detector ensure high inter-instrument spectral reproducibility; model transfer is further supported by NIRCal’s standardization algorithms (e.g., piecewise direct standardization, PDS).
What maintenance is required beyond lamp replacement?
No optical alignment or internal recalibration is needed; routine maintenance consists solely of lamp replacement (every ~12,000 h), desiccant cartridge renewal (biannual), and annual SST verification using the integrated reference wheel.
Does the system support PAT (Process Analytical Technology) deployment?
Yes—Ethernet connectivity, real-time spectral streaming (via TCP socket API), and programmable trigger inputs enable seamless integration into DCS/SCADA systems for continuous or triggered measurement during manufacturing operations.
Is NIRCal validated for GMP use?
NIRCal is supplied with comprehensive validation documentation (IQ/OQ templates, test scripts, and summary reports); site-specific PQ execution is supported by BUCHI’s global validation services team.
