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设计流变学:分析方法验证的法规指南

Rheology by Design: A Regulatory Tutorial for Analytical Method Validation.

作者信息

Simões Ana, Miranda Margarida, Cardoso Catarina, Vitorino Francisco Veiga andCarla

机构信息

Faculty of Pharmacy, University of Coimbra, Portugal, Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal.

Associated Laboratory for Green Chemistry of the network of chemistry and technology (LAQV. REQUIMTE) Group of Pharmaceutical Technology, Faculty of Pharmacy, University of Coimbra, Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal.

出版信息

Pharmaceutics. 2020 Aug 28;12(9):820. doi: 10.3390/pharmaceutics12090820.

Abstract

The increasing demand for product and process understanding as an active pursuit in the quality guideline Q8 and, more recently, on the draft guideline on quality and equivalence of topical products, has unveiled the tremendous potential of rheology methods as a tool for microstructure characterization of topical semisolid dosage forms. Accordingly, procedure standardization is a dire need. This work aimed at developing and validating a methodology tutorial for rheology analysis. A 1% hydrocortisone cream was used as model cream formulation. Through a risk assessment analysis, the impact of selected critical method variables (geometry, temperature and application mode) was estimated in a broad range of rheological critical analytical attributes-zero-shear viscosity, upper-shear thinning viscosity, lower-shear thinning viscosity, infinite-shear viscosity, rotational yield point, thixotropic relative area, linear viscoelastic region, oscillatory yield point, storage modulus, loss modulus, and loss tangent. The proposed validation of the approach included the rheometer qualification, followed by the validation of numerous operational critical parameters regarding a rheology profile acquisition. The thixotropic relative area, oscillatory yield point, flow point and viscosity related endpoints proved to be highly sensitive and discriminatory parameters. This rationale provided a standard framework for the development of a reliable and robust rheology profile acquisition.

摘要

在质量指南Q8以及最近关于局部用产品质量与等效性的指南草案中,对产品和工艺理解的需求日益增加,这揭示了流变学方法作为一种用于表征局部半固体制剂微观结构的工具所具有的巨大潜力。因此,程序标准化迫在眉睫。这项工作旨在开发并验证一种流变学分析方法教程。选用1%氢化可的松乳膏作为模型乳膏制剂。通过风险评估分析,在广泛的流变学关键分析属性(零剪切粘度、高剪切变稀粘度、低剪切变稀粘度、无限剪切粘度、旋转屈服点、触变相对面积、线性粘弹性区域、振荡屈服点、储能模量、损耗模量和损耗角正切)范围内,评估了选定关键方法变量(几何形状、温度和应用模式)的影响。所提议的方法验证包括流变仪鉴定,随后对与流变学曲线采集相关的众多操作关键参数进行验证。触变相对面积、振荡屈服点、流动点和粘度相关终点被证明是高度敏感和有区分性的参数。这一基本原理为开发可靠且稳健的流变学曲线采集提供了标准框架。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0747/7558587/fcb5d7623772/pharmaceutics-12-00820-g001.jpg

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