Near-Infrared Spatially Resolved Spectroscopy for Tablet Quality Determination

Area of Science:

• Analytical Chemistry
• Pharmaceutical Sciences
• Spectroscopy

Background:

• Near-infrared (NIR) spectroscopy is a standard technique for analyzing solid oral dosage forms.
• Assessing ingredient distribution and tablet uniformity is crucial for pharmaceutical quality control.
• Traditional single-point NIR lacks the spatial resolution to detect localized variations within tablets.

Purpose of the Study:

• To compare the effectiveness of single-point NIR spectroscopy versus spatially resolved spectroscopic (SRS) measurements for tablet assay determination.
• To evaluate the capability of SRS in identifying heterogeneity in under-blended pharmaceutical tablets.
• To assess the potential of SRS as a complementary tool for in-line, real-time tablet analysis.

Main Methods:

• Development and testing of calibration models using experimental designs for both single-point NIR and SRS instruments.
• Preparation of highly heterogeneous tablet samples through under-blending of constituents prior to compaction.
• Comparative analysis of the analytical performance of single-point NIR and SRS on these heterogeneous samples.

Main Results:

• Spatially resolved spectroscopy (SRS) demonstrated the ability to provide spatial information regarding ingredient distribution.
• SRS successfully identified local heterogeneity and abnormal tablets that were undetectable by traditional single-point NIR spectroscopy.
• The study confirmed SRS's utility in characterizing local variations, complementing traditional NIR methods.

Conclusions:

• Spatially resolved spectroscopy (SRS) offers significant advantages over single-point NIR for detecting tablet heterogeneity.
• SRS provides spatial insights typically requiring imaging techniques, enhancing the analysis of tablet uniformity.
• SRS is a valuable tool for in-line, real-time tablet analysis, complementing existing NIR systems for improved pharmaceutical quality control.