Peer-reviewed journal (1-3 of 3)

1. Variographic analysis: A new methodology for quality assurance of pharmaceutical blending processes

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   09 Jun 2023 | Contributor(s):: Sánchez-Paternina, Adriluz, Sierra-Vega, Nobel O., Cárdenas, Vanessa, Méndez, Rafael, Esbensen, Kim H., Romañach, Rodolfo J.

   Analytical methods for real time monitoring of pharmaceutical blending processes are thoroughly validated but not the sampling methods. Variographic analysis was investigated as a method to determine the sampling and analytical errors when the drug concentration of pharmaceutical powder blends is...

2. Evaluation of Analytical and Sampling Errors in the Prediction of the Active Pharmaceutical Ingredient Concentration in Blends From a Continuous Manufacturing Process

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   09 Jun 2023 | Contributor(s):: Vargas, Jenny, Roman-Ospino, Andres, Sanchez, Eric, Romañach, Rodolfo

   Purpos: A near-infrared (NIR) spectroscopic method was developed for real time analysis of the active pharmaceutical ingredient (API) in blends from a continuous manufacturing process. The sampling and analytical errors of these determinations were estimated through variographic analysis....

3. Adequacy and Verifiability of Pharmaceutical Mixtures and Dose Units by Variographic Analysis (Theory of Sampling) - A Call for a Regulatory Paradigm Shift

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   09 Jun 2023 | Contributor(s):: Esbensen, Kim H, Román-Ospino, Andrés D., Sanchez, Adriluz, Romañach, Rodolfo J.

   In spite of intense efforts in the last 20 years, the current state of affairs regarding evaluation of adequacy of pharmaceutical mixing is at an impressive standstill, characterized by two draft guidances, one withdrawn, and the other never approved. We here analyze the regulatory, scientific...