Data and method transfer from System II analyzer to Metrohm NIRS XDS or DS 2500 analyzers

Significance of the Topic

Near infrared spectroscopy is widely used for rapid nondestructive analysis in pharmaceutical, chemical and industrial settings. As older NIRSystems System II analyzers reach end of support, migrating existing analytical methods to modern instruments ensures continuity of quality control and enhances performance through higher spectral resolution and broader wavelength coverage.

Objectives and Overview of the Study

This application note describes the process of transferring calibration models and spectral data from FOSS NIRSystems System II (5000/6500) analyzers to Metrohm NIRS XDS and DS2500 instruments. It highlights the workflow simplicity, necessary data preprocessing steps and the analytical advantages offered by the new hardware.

Methodology and Instrumentation Used

Key steps in the transfer procedure include additional reference measurements on the System II instrument, reference standardization, spectral conversion and expansion followed by calibration redevelopment in Vision software version 4.1.

• Software Vision 4.1
• FOSS NIRSystems System II (5000/6500)
• Metrohm NIRS XDS Analyzer
• Metrohm NIRS DS2500 Analyzer

Main Results and Discussion

The Metrohm NIRS XDS and DS2500 instruments offer a spectral range of 400 to 2500 nanometers with 0.5 nm resolution, compared to 1100 to 2500 nanometers and 2 nm resolution on System II. Key findings include:

• Qualitative analysis of propafenone and herbal products shows clearer peak separation and enhanced detection of overlapping bands.
• Quantitative determination of polyethylene density yields a correlation coefficient increase from 0.942 to 0.965 and reductions in standard error of calibration from 0.0038 to 0.0029 g per cm3 and cross-validation error from 0.0041 to 0.0032 g per cm3.

Benefits and Practical Applications

By reusing existing spectral libraries and chemometric models, laboratories can avoid full re-collection campaigns. The improved resolution and extended range lead to more robust calibrations, faster measurement cycles and simplified lamp maintenance.

Future Trends and Possibilities

Advances in chemometric algorithms, networked instrument fleets and integration with laboratory information management systems will further enhance method transferability. Expanded wavelength coverage may enable new applications in polymer analysis, food authentication and on-line process monitoring.

Conclusion

Transferring NIR calibration methods from legacy System II analyzers to Metrohm NIRS XDS and DS2500 platforms is straightforward and delivers measurable gains in analytical performance. This approach preserves existing investments while leveraging modern instrumentation capabilities.

Reference

• Application Note NIR-34 for extended quantitative applications