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AAPS PharmSciTech. 2002 September; 3(3): 61–71.
Published online 2015 February 19. doi:  10.1007/BF02830622
PMCID: PMC2784053

Blend uniformity analysis using stream sampling and near infrared spectroscopy

Abstract

A near infrared spectroscopic method was developed to determine drug content in a 20% (wt/wt) ibuprofen and spray-dried hydous lactose blend. A blending profile was obtained after blending for 0.5, 1, 3, 5, 10, and 20 minutes. Stream sampling was used to collect about 20 blend samples at each of the blending times from a laboratory scale V-blender. The samples collected were used to develop a near infrared calibration model. The calibration model was then used to determine the drug content of unknown samples from 2 validation blends. The validation blends were not included in the calibration model; they were used to evaluate the effectiveness of the calibration model. A total of 45 samples from the 2 validation blends were predicted by the near infrared calibration model and then analyzed by a validated UV spectrophotometric method. The root mean square error of prediction for the first validation blend was 5.69 mg/g and 3.30 mg/g for the samples from the second blend. A paired t test at the 95% confidence level did not indicate any differences between the drug content predicted by the near infrared spectroscopy (NIRS) method and the validated UV method for the 2 blends. The results show that the NIRS method could be developed while the blending profile is generated and used to thoroughly characterize a new formulation during development by analyzing a large number of samples. The new formulation could be transferred to a manufacturing plant with an NIRS method to facilitate blend uniformity analysis.

Keywords: near infrared spectroscopy, blend uniformity analysis, stream sampling, pharmaceutical analysis, powder technology

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.
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Articles from AAPS PharmSciTech are provided here courtesy of American Association of Pharmaceutical Scientists