ERASPEC DIESEL Portable Mid-Infrared Diesel Analyzer

Overview

The ERASPEC DIESEL is a fully automated, portable mid-infrared Fourier Transform Infrared (FTIR) spectrometer engineered for rapid, laboratory-grade quantitative analysis of diesel fuel and blended biofuels. Unlike conventional wet-chemistry or combustion-based methods, the ERASPEC DIESEL leverages high-resolution mid-IR absorption spectroscopy across a broad spectral range (631–45,890 cm⁻¹) to capture complete molecular fingerprint information from undiluted 10 mL samples in under 60 seconds. Its optical architecture—originally developed for defense-grade field deployment—features an interferometer with <0.01 cm⁻¹ wavelength accuracy, 2 cm⁻¹ nominal resolution (with 0.5 cm⁻¹ data sampling), and a signal-to-noise ratio exceeding 10,000:1. This enables robust multivariate calibration models trained against reference ASTM D613, ISO 5164, and EN ISO 5164 methods, delivering traceable cetane number (CN) and cetane index (CI) values with metrological consistency suitable for R&D, quality control, and regulatory compliance workflows.

Key Features

• Fully integrated portable design (9.7 kg, 290 × 350 × 340 mm) with dual-power capability: AC mains (85–264 VAC) and 12 V/8 A DC vehicle supply.
• Zero warm-up requirement: ready for measurement immediately after power-on; no solvent pre-conditioning or hexane calibration needed.
• Automated sample handling system with built-in bubble elimination and air-liquid cleaning cycle—ensuring reproducible cell filling and minimizing carryover.
• 7-inch full-color capacitive touchscreen with native Chinese GUI; firmware supports optional English localization and future expansion to gasoline and jet fuel modules.
• Comprehensive connectivity suite: five USB ports (for printer, keyboard, external storage, PC interface), one Ethernet port, one RS232 serial interface, and LIMS-ready communication protocols.
• Onboard database stores up to 6,000 complete analytical records—including raw interferograms, processed spectra, and calculated parameters—with timestamp, operator ID, and QC flag metadata.
• High-precision integrated densitometer (±0.0001 g/cm³) synchronized with spectral acquisition for density-corrected quantification of volumetric and mass-based concentrations.

Sample Compatibility & Compliance

The ERASPEC DIESEL is validated for direct analysis of conventional diesel, biodiesel blends (B5–B100), synthetic diesel (e.g., Fischer–Tropsch), ethanol-diesel emulsions, and oxygenated additives including fatty acid methyl esters (FAME), fatty acid ethyl esters (FAEE), rapeseed oil, dimethoxymethane (DMM), and cetane improvers such as 2-ethylhexyl nitrate. It meets the spectral and performance requirements of EN 14078 and GB 23801 for FAME quantification, and is the only instrument certified to comply with GB/T 33648–2017 for detection of illegal aromatic and oxygenate additives in diesel fuel. All calibrations are traceable to NIST-traceable reference fuels and validated per ISO/IEC 17025 principles. The system supports GLP-compliant audit trails when connected to enterprise LIMS via Ethernet or RS232.

Software & Data Management

The embedded analytical software employs chemometric algorithms (PLS, PCR, and proprietary spectral deconvolution routines) trained on thousands of reference fuel spectra. It delivers simultaneous quantification of ≥18 parameters—including CN, CI, T85/T90/T95 distillation points, total aromatics, PAH content, FAME/FAEE volume %, and cetane improver concentration—without manual peak integration. Raw interferograms and absorbance/transmittance spectra are exportable in standard JCAMP-DX format. USB mass storage allows secure transfer of results (.csv, .pdf, .jdx) and firmware/database updates. When linked to a networked PC, the system supports FDA 21 CFR Part 11–compliant electronic signatures, role-based user access control, and automated report generation with digital signature fields.

Applications

• Refinery process optimization: real-time monitoring of hydrotreating severity and blending ratios.
• Fuel quality assurance in bulk terminals and retail distribution networks.
• Regulatory enforcement testing for adulteration, tax classification, and renewable content verification (e.g., EU RED II, U.S. RFS).
• R&D of advanced biofuels and synthetic hydrocarbons—enabling structure–property correlation studies between IR spectral features and ignition behavior.
• Field deployment in mobile labs, customs checkpoints, and military logistics units requiring rapid, unambiguous fuel authentication.
• Academic research in combustion chemistry, catalytic upgrading, and alternative fuel formulation.

FAQ

Does the ERASPEC DIESEL require daily calibration with reference standards?
No. It uses an internal reference interferogram and real-time background subtraction—eliminating routine standardization. Periodic verification with certified reference fuels (e.g., NIST SRM 2722) is recommended every 90 days for audit readiness.
Can it analyze fuels containing ethanol or methanol?
Yes—within defined concentration limits. The chemometric model includes ethanol-diesel and methanol-diesel blends; however, samples with >15% v/v low-molecular-weight alcohols may require custom model retraining.
Is spectral data export compatible with third-party chemometrics platforms?
Yes. All raw and processed spectra are exportable in JCAMP-DX v5.01 format, fully interoperable with Unscrambler®, Pirouette®, MATLAB, and Python-based scikit-learn workflows.
How is measurement traceability maintained for regulatory submissions?
Each result includes embedded metadata: instrument serial number, firmware version, calibration certificate ID, operator login, environmental temperature/humidity logs, and digital signature hash—satisfying ISO/IEC 17025 and GLP documentation requirements.
What maintenance is required for long-term field operation?
Annual optical alignment verification and desiccant cartridge replacement (included in service kit). No consumables—no lamps, no detectors requiring cooling, no moving parts beyond the automated fluidics module.