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Raman spectroscopy as a PAT for pharmaceutical blending: Advantages and disadvantages.
Daniela Riolo1, Alessandro Piazza1, Ciro Cottini1
1Chiesi Farmaceutici S.p.A., R&D, Chemistry Manufacturing and Control, Via Palermo 26 A, 43122 Parma, Italy.
Journal of Pharmaceutical and Biomedical Analysis
|November 14, 2017
Summary
Raman spectroscopy effectively monitors powder blending in real-time, offering advantages over traditional HPLC analysis for pharmaceutical manufacturing. This technique provides more comprehensive data for assessing blend homogeneity.
Area of Science:
- Pharmaceutical Technology
- Analytical Chemistry
- Process Analytical Technology (PAT)
Background:
- Powder blending is critical in pharmaceutical manufacturing, requiring precise monitoring for homogeneity.
- Traditional methods like HPLC are time-consuming and may not provide real-time feedback.
- Process Analytical Technology (PAT) aims to improve process understanding and control through real-time monitoring.
Purpose of the Study:
- To evaluate Raman spectroscopy as a real-time monitoring tool for powder blending processes.
- To compare the advantages and disadvantages of Raman spectroscopy against traditional HPLC analysis.
- To demonstrate the potential of Raman spectroscopy in determining the endpoint of pharmaceutical powder mixing.
Main Methods:
- Real-time monitoring of powder blends using in-line Raman spectroscopy.
- Comparison of spectroscopic data with traditional HPLC analysis on sampled powders.
- Selection of optimal wavenumber regions to maximize active pharmaceutical ingredient (API) signal and minimize excipient interference.
- Mapping of samples using a motorized XY stage and a defocused laser beam for representative sampling.
- Analysis of blend homogeneity by plotting area ratios of API and excipient Raman peaks over mixing time.
Main Results:
- Raman spectroscopy proved effective for in-line, real-time monitoring of powder blending.
- Good correlation between Raman and HPLC was observed for a 6.0% API concentration.
- Raman spectroscopy generated richer blend profiles compared to HPLC, indicated by standard deviation analysis.
- Relative standard deviation from a single Raman map (30 points) effectively represented blend homogeneity.
Conclusions:
- Raman spectroscopy is a valuable PAT tool for real-time monitoring of powder blending processes.
- The technique offers advantages in data richness and real-time feedback compared to HPLC.
- Raman spectroscopy can accurately assess blend homogeneity, particularly at higher API concentrations.
Keywords:
High performance liquid chromatography (HPLC)PharmaceuticalsPowder blending processesProcess analytical technologies (PAT)Raman spectroscopyMore Related Videos
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