Metrohm NanoRam-1064 handheld Raman spectrometer

Importance of the Topic

The identification and verification of raw materials in pharmaceutical and chemical industries is critical for ensuring product quality, regulatory compliance, and operational efficiency. Handheld Raman spectroscopy offers a nondestructive, rapid, and reliable approach to confirm APIs, excipients, and intermediates without sample preparation, minimizing downtime in production and eliminating quarantine delays.

Study Objectives and Overview

This article presents an overview of the NanoRam-1064, a portable Raman spectrometer designed for in situ material authentication. The main goals are to describe its capabilities, assess performance in real-world scenarios, and demonstrate compliance with international pharmacopeial standards.

Methodology and Instrumentation

Raman analysis is performed through transparent or opaque containers using a 1064 nm laser to reduce fluorescence interference. Key methodological features include:

• Through‐container measurement—preserves sample integrity and throughput.
• TE-cooled detector—ensures spectral stability across variable ambient temperatures.
• User-definable libraries and validation protocols—facilitates rapid method deployment and transferability.
• Multivariate pass/fail algorithms—leverages p-value statistics from reduced‐variable models for robust identification.
• Optional mixture analysis—for simultaneous detection of multiple components.

Used Instrumentation

The NanoRam-1064 system comprises:

• Excitation source: 1064 nm laser, adjustable output up to 420 mW in 10% increments.
• Spectral coverage: 176 cm⁻¹ to 2500 cm⁻¹.
• Detection: TE-cooled sensor for low-noise data acquisition.
• Interfaces: Bright touchscreen, onboard barcode reader (1D/2D), optional factory-enabled camera.
• Software: Embedded NOS-1064 for on-device operations; PC-based NID EX for data management, report generation, LIMS integration, and full audit trail (21 CFR Part 11 compliant).
• Connectivity: Secure Wi-Fi and USB synchronization to network servers.
• Sampling accessories: Point & Shoot adaptor, vial holder, polystyrene validation cap, bottle and right-angle adaptors, immersion probe, large spot adaptor (optional).

Main Results and Discussion

Performance tests demonstrate:

• High data quality with minimal noise and fast measurement times, even for highly fluorescent or colored samples.
• Successful differentiation of structurally related compounds, such as cellulose variants, polysorbates, and coating agents (Opadry®).
• Reliable method validation and library transfer, reducing method activation time on new devices.
• Effective mixture analysis for complex samples through multivariate spectral deconvolution.

Benefits and Practical Applications

Key advantages include:

• Nontechnical user operation via intuitive touch workflow and one-touch pass/fail results.
• Elimination of quarantine zones by on-the-spot verification at loading docks, warehouses, or in the field.
• Full compliance with cGMP and international pharmacopeial standards (USP, EP, JP, ChP).
• Secure data handling supporting 21 CFR Part 11 requirements for electronic records and signatures.

Future Trends and Applications

Advancements in handheld Raman technology may include:

• Integration of cloud-based libraries and AI‐driven spectral matching for real-time global updates.
• Enhanced miniaturization to further reduce weight and improve ergonomics.
• Expanded chemometric toolsets for quantitative analysis and contaminant screening.
• Broader adoption in supply chain verification, counterfeit detection, and on-site environmental monitoring.

Conclusion

The NanoRam-1064 handheld Raman spectrometer offers a robust, user-friendly solution for rapid material identification in regulated environments. With advanced fluorescence suppression, versatile sampling options, and compliant software, it streamlines quality assurance workflows and supports 100% identity assurance for raw materials.

References

• United States Pharmacopeia, General Chapter <858> Raman Spectroscopy.
• European Pharmacopeia, Chapter 2.2.48 Raman Spectroscopy.
• Japanese Pharmacopoeia, Section 2.26 Raman Spectroscopy.
• People’s Republic of China Pharmacopoeia Guidelines on Raman Spectroscopy.
• B&W Tek, NanoRam-1064 Handheld Raman Spectrometer, Doc-Rev: 280001290-D (2021/02/01).