Metrohm MIRA Cal M Tutorial

Significance of the topic

Portable Raman spectroscopy has become a critical tool for rapid, non-destructive chemical identification in field and laboratory environments. By combining handheld analyzers with mobile software, analysts gain unprecedented flexibility to perform real-time inspections, quality control, safety checks and regulatory compliance without returning to a central lab.

Objectives and overview

• Provide a mobile interface (MIRA Cal M) for Android devices to configure and control Metrohm Raman instruments (MIRA XTR DS / MIRA DS).
• Enable end-users to acquire and visualize Raman spectra, perform library matching and mixture analysis on the go.
• Offer comprehensive sample management including metadata capture, editing, export and sharing.
• Facilitate creation, import and maintenance of spectral libraries for accurate substance identification.

Methodology and instrumentation

The MIRA Cal M app communicates with the Raman analyzer via Bluetooth. Workflow steps include:

• Instrument calibration using a certified standard and automated system suitability test.
• Definition of acquisition procedures (integration time, laser power, averages, continuous or multi-scan modes).
• Sample measurement with or without autofocus stand-off attachment; optional distance calculation and aiming laser.
• In-app data transfer of spectra and metadata, automatic storage on the Android device.

Instrumentation used

• Metrohm Instant Raman Analyzer MIRA XTR DS or MIRA DS
• Android smartphone or tablet (OS 8.0 – 11.0)
• Bluetooth® wireless connection
• Certified Calibration Standard
• Autofocus stand-off attachment with aiming laser
• HazMasterG3® integration for hazardous substance reporting

Main results and discussion

• Reliable Bluetooth pairing and PIN-protected connection ensure secure data exchange.
• Calibration routine and system suitability checks validate instrument performance before sample measurements.
• Flexible acquisition states support continuous scan, multi-scan and delayed measurement modes.
• Real-time library matching and mixture analysis can run onboard the device or on the analyzer, then downloaded to the app.
• Comprehensive sample viewer displays spectra, legends, full-screen mode, overlay, metadata (geolocation, photos) and supports reprocessing with local or onboard libraries.
• Library management functions include viewing, creating, importing licensed/user libraries and editing sample metadata (CAS number, hazard data).
• Data export options cover external storage, email, full or summary reports, and HazMasterG3® sensor data fusion.

Benefits and practical applications

• Portability allows in-field chemical identification in security, environmental monitoring, pharmaceuticals, food safety and materials verification.
• Rapid, on-site decision making reduces turnaround times and logistical costs of sample transport.
• Integrated metadata capture (GPS, images, timestamps) enhances traceability and reporting.
• Customizable procedures and library updates ensure adaptability to evolving analytical requirements.
• Seamless integration with regulatory reporting software (HazMasterG3®) streamlines hazard assessment workflows.

Future trends and opportunities

• Expansion to newer Android versions and cross-platform support (iOS).
• Implementation of machine learning algorithms for advanced spectral deconvolution and unknown identification.
• Cloud-based library synchronization and remote instrument monitoring.
• Integration of additional sensor modalities (Raman combined with LIBS, NIR) in a unified mobile platform.
• Enhanced user collaboration through real-time data sharing and secure networked databases.

Conclusion

The MIRA Cal M mobile application extends the power of handheld Raman analyzers by providing a comprehensive, user-friendly interface for calibration, acquisition, library management and data export. Its robust feature set and flexible architecture make it an essential tool for on-site chemical analysis, supporting faster decisions and improved safety across a range of industries.

References

• Metrohm Raman. MIRA Cal M Tutorial 8.0105.8023EN, September 2021.
• Metrohm Raman MIRA DS Manual 8.926.8001EN.
• Metrohm Raman MIRA XTR DS Manual 8.0926.8005EN.