QTRam Portable Raman System for Content Uniformity

Importance of the topic

Ensuring content uniformity in solid pharmaceutical dosage forms is critical for patient safety and regulatory compliance. Transmission Raman spectroscopy offers a noninvasive, rapid technique to analyze the bulk composition of tablets and capsules without sample destruction or preparation, supporting quality control and formulation development in the pharmaceutical industry.

Objectives and overview

This application note presents the QTRam® Portable Raman System, designed to deliver fast, quantitative data on content uniformity, polymorphic form, and crystallinity of solid samples. The study demonstrates how the STRaman® technology enables high-throughput, nondestructive testing directly at-line, in-line, or in the laboratory, helping pharmaceutical manufacturers meet USP 905 requirements.

Methodology and instrumentation

The QTRam system employs a 785 nm laser source to generate Raman scattering signals through a large sample volume. Measurements are performed in transmission mode, where the laser beam passes through the entire tablet or capsule. Spectral data are acquired and processed using BWAnalyst® software, which features 21 CFR Part 11 compliance, step-by-step quantitative model development, and automated reporting.

Used Instrumentation

• Model: BWS475-785H-CUL
• Laser source wavelength: 785 nm
• Analysis mode: Transmission Raman spectroscopy
• Software: BWAnalyst® (21 CFR Part 11 compliant)
• Power options: 100–240 V AC adaptor; optional battery pack up to 4 h operation
• Sample holders: Customizable for various tablet and capsule dimensions

Main results and discussion

Experimental validation demonstrated quantitative analysis of active pharmaceutical ingredients and excipients with results obtained within seconds. Calibration models built in BWAnalyst® yielded high accuracy for content uniformity assessments, while polymorphic and crystallinity information was resolved from the same spectra. The system’s large sampling volume minimized variability caused by surface heterogeneity. Data reproducibility and sensitivity met or exceeded USP 905 standards for transmission Raman applications.

Benefits and practical applications

• Rapid, nondestructive measurement requiring no sample preparation or consumables
• Comprehensive analysis of content, polymorphic form, and crystallinity in a single scan
• Portability for direct implementation in production lines or research labs
• Cost savings by eliminating disposal of test samples and consumable reagents
• Regulatory compliance with USP-approved transmission Raman methods

Future trends and possibilities

Advances in portable Raman technology will enable broader adoption in continuous manufacturing and automated quality control workflows. Integration with digital manufacturing platforms and machine learning algorithms promises real-time process analytics and adaptive control. Miniaturization of detectors and improved battery life will further expand in-field applications, including counterfeit detection and on-site formulation screening.

Conclusion

The QTRam® Portable Raman System combines STRaman® technology with user-friendly software to provide a fast, reliable tool for content uniformity testing in pharmaceuticals. Its nondestructive operation, regulatory compliance, and portability make it an effective solution for quality assurance and formulation development, aligning with industry trends toward inline and at-line process analytical technology.