Biodiesel content in diesel with nearinfrared spectroscopy
Applications | 2026 | MetrohmInstrumentation
Near infrared spectroscopy enables rapid, non-destructive quantification of biodiesel in diesel fuel, addressing quality control needs and preventing engine issues caused by excessive biodiesel blends.
This study developed and validated a model to quantify biodiesel content in diesel blends ranging from 0% to 20% using NIRS. Twenty-one samples were analyzed to demonstrate applicability in routine and online monitoring.
Diesel samples with known biodiesel proportions were measured in transmission mode from 1000 to 2250 nm at 30 °C using 8 mm disposable vials. Spectral data were processed and a calibration model was built with OMNIS software.
The calibration yielded a correlation coefficient (R2CV) of 1.000 and a standard error of cross validation (SECV) of 0.16 %. These figures indicate excellent prediction accuracy and robust performance for biodiesel quantification.
The NIRS method eliminates sample preparation, delivers results in seconds, and supports online process control via fiber optics. It reduces analysis time, labor, and costs compared to traditional methods such as ASTM D7467.
Integration of NIRS with process automation and expansion to multi-parameter analysis including cetane number, moisture, and flash point will further enhance fuel quality monitoring and regulatory compliance.
Near-infrared spectroscopy on the OMNIS platform provides a fast, accurate, and cost-efficient solution for biodiesel content determination in diesel fuels, enabling comprehensive quality control and process monitoring.
NIR Spectroscopy
IndustriesEnergy & Chemicals
ManufacturerMetrohm
Summary
Importance of the Topic
Near infrared spectroscopy enables rapid, non-destructive quantification of biodiesel in diesel fuel, addressing quality control needs and preventing engine issues caused by excessive biodiesel blends.
Objectives and Study Overview
This study developed and validated a model to quantify biodiesel content in diesel blends ranging from 0% to 20% using NIRS. Twenty-one samples were analyzed to demonstrate applicability in routine and online monitoring.
Methodology
Diesel samples with known biodiesel proportions were measured in transmission mode from 1000 to 2250 nm at 30 °C using 8 mm disposable vials. Spectral data were processed and a calibration model was built with OMNIS software.
Used Instrumentation
- OMNIS NIR Analyzer Liquid
- 8 mm disposable transmission vials with temperature control
- OMNIS Software with Quant Development module
Main Results and Discussion
The calibration yielded a correlation coefficient (R2CV) of 1.000 and a standard error of cross validation (SECV) of 0.16 %. These figures indicate excellent prediction accuracy and robust performance for biodiesel quantification.
Benefits and Practical Applications
The NIRS method eliminates sample preparation, delivers results in seconds, and supports online process control via fiber optics. It reduces analysis time, labor, and costs compared to traditional methods such as ASTM D7467.
Future Trends and Potential Applications
Integration of NIRS with process automation and expansion to multi-parameter analysis including cetane number, moisture, and flash point will further enhance fuel quality monitoring and regulatory compliance.
Conclusion
Near-infrared spectroscopy on the OMNIS platform provides a fast, accurate, and cost-efficient solution for biodiesel content determination in diesel fuels, enabling comprehensive quality control and process monitoring.
Reference
- Metrohm AG, Application Note AN-NIR-126. Biodiesel content in diesel with near-infrared spectroscopy.
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