ZOLIX FI-Lite Series Portable Raman Spectrometer for Liquid Sample Analysis

Overview

The ZOLIX FI-Lite Series Portable Raman Spectrometer is an integrated, field-deployable analytical instrument engineered specifically for rapid, non-destructive molecular characterization of liquid-phase samples. It operates on the principle of inelastic light scattering—Raman spectroscopy—where monochromatic laser excitation (785 nm or 830 nm options) induces vibrational mode transitions in analytes, generating characteristic spectral fingerprints. Designed for operational simplicity and environmental robustness, the FI-Lite series features a sealed, ruggedized chassis with no moving parts in the optical path and passive thermal management—eliminating fan-induced vibration and acoustic noise that could compromise signal stability during field acquisition. Its compact, notebook-style clamshell enclosure integrates all core subsystems—including excitation laser, aberration-corrected Czerny–Turner spectrometer, thermoelectrically cooled back-illuminated CCD detector, embedded computing platform, and rechargeable Li-ion battery—into a single, self-contained unit. This architecture ensures consistent alignment, minimal warm-up time (<60 s), and reliable performance across ambient temperature ranges from 5 °C to 40 °C, making it suitable for uncontrolled environments such as customs checkpoints, pharmaceutical manufacturing floors, agricultural supply chains, and emergency response vehicles.

Key Features

• Integrated 10-inch capacitive touch display running either Windows 10 IoT Enterprise or Android 11 (model-dependent), enabling fully autonomous operation without external PCs or peripherals
• Fanless thermal design with aluminum alloy heat-sink chassis and precision-controlled TEC cooling for detector stabilization—ensuring baseline consistency over extended acquisition sessions
• Low-stray-light optical bench optimized for aqueous matrix analysis, minimizing fluorescence interference common in biological and food-related liquids
• Built-in spectral library containing >1,200 reference spectra for pharmaceutical actives, excipients, illicit substances, pesticides, and common solvents—supporting real-time library matching with confidence scoring (Cosine Similarity ≥ 0.92)
• Onboard data processing engine supporting baseline correction (Asymmetric Least Squares), peak deconvolution (Gaussian–Lorentzian fitting), and spectral normalization—exportable in ASTM E131-compliant .spc and .jdx formats
• Rechargeable 96 Wh lithium polymer battery delivering >4 hours of continuous spectral acquisition at 10 s integration time, with hot-swappable capability via optional dual-battery module

Sample Compatibility & Compliance

The FI-Lite series is validated for direct analysis of transparent to semi-turbid liquid samples—including aqueous solutions, ethanol-based formulations, oils, suspensions, and SERS-active colloids—using standard 10 mm pathlength quartz cuvettes or disposable vials. Optional fiber-coupled immersion probes (600 µm core, FC/PC connector) enable in-situ measurements in reactors, pipelines, or open containers. All hardware and firmware comply with IEC 61326-1 (EMC for laboratory equipment), IEC 61010-1 (safety requirements), and RoHS 3 directives. Software versions support audit trail functionality per FDA 21 CFR Part 11 when deployed in GxP-regulated environments (e.g., pharmaceutical raw material verification), including electronic signatures, user access levels, and immutable log records for spectral acquisition parameters and metadata.

Software & Data Management

Two distinct software platforms are offered: FI-Lite Windows Edition (based on .NET Framework 4.8) provides advanced spectral preprocessing, multivariate calibration (PCA, PLS), and custom method development using Python 3.9 scripting API; FI-Lite Android Edition delivers streamlined one-touch screening workflows optimized for SERS-enhanced detection—featuring adaptive exposure control, automated threshold-based alarm triggering, and encrypted cloud sync (AWS S3-backed) for distributed lab coordination. Both editions generate timestamped, geotagged reports compliant with ISO/IEC 17025 documentation requirements. Raw spectral data are stored in HDF5 format with embedded instrument configuration metadata, ensuring full traceability and interoperability with third-party chemometric tools (e.g., Unscrambler X, MATLAB).

Applications

• Pharmaceutical quality control: Identification of counterfeit APIs, verification of excipient composition in liquid dosage forms, and real-time monitoring of crystallization processes
• Food safety surveillance: Detection of melamine, Sudan dyes, antibiotics, and adulterants (e.g., glycerol in honey) in milk, juice, wine, and edible oils
• Hazardous substance screening: Field identification of narcotics (fentanyl analogues, methamphetamine), toxic industrial chemicals (TICs), and chemical warfare agent simulants
• Agricultural analytics: Quantification of pesticide residues in irrigation water and plant extracts; assessment of fermentation metabolites in bioethanol production
• Materials science research: In situ characterization of plasmonic nanoparticle colloids, catalytic reaction intermediates in liquid-phase synthesis, and polymer degradation kinetics

FAQ

Is the FI-Lite series compatible with SERS substrates?
Yes—both 785 nm and 830 nm configurations are optimized for coupling with Au/Ag colloidal nanoparticles, nanostructured chips, and flexible SERS tapes. The system includes pre-configured SERS acquisition templates with auto-exposure adjustment based on substrate enhancement factor.
Can spectral data be exported for regulatory submission?
Yes—raw and processed spectra export in ASTM E131, JCAMP-DX, and HDF5 formats; full audit trails and electronic signatures are available in Windows Edition under 21 CFR Part 11 mode.
What is the recommended calibration frequency?
Wavelength calibration is factory-performed using NIST-traceable neon-argon emission lines; users may verify calibration quarterly using the included polystyrene reference slide (Raman shift: 1003 cm⁻¹). Intensity calibration is optional and performed annually via certified radiometric source.
Does the instrument support remote diagnostics or firmware updates?
Yes—over-the-air (OTA) firmware updates and remote diagnostic session initiation are supported via secure TLS 1.3 connection; enterprise customers may deploy private update servers compliant with ISO/IEC 27001 policies.