کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2486852 1114395 2009 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Rapid freeze-drying cycle optimization using computer programs developed based on heat and mass transfer models and facilitated by tunable diode laser absorption spectroscopy (TDLAS)
موضوعات مرتبط
علوم پزشکی و سلامت داروسازی، سم شناسی و علوم دارویی اکتشاف دارویی
پیش نمایش صفحه اول مقاله
Rapid freeze-drying cycle optimization using computer programs developed based on heat and mass transfer models and facilitated by tunable diode laser absorption spectroscopy (TDLAS)
چکیده انگلیسی

Computer programs in FORTRAN were developed to rapidly determine the optimal shelf temperature, Tf, and chamber pressure, Pc, to achieve the shortest primary drying time. The constraint for the optimization is to ensure that the product temperature profile, Tb, is below the target temperature, Ttarget. Five percent mannitol was chosen as the model formulation. After obtaining the optimal sets of Tf and Pc, each cycle was assigned with a cycle rank number in terms of the length of drying time. Further optimization was achieved by dividing the drying time into a series of ramping steps for Tf, in a cascading manner (termed the cascading Tf cycle), to further shorten the cycle time. For the purpose of demonstrating the validity of the optimized Tf and Pc, four cycles with different predicted lengths of drying time, along with the cascading Tf cycle, were chosen for experimental cycle runs. Tunable diode laser absorption spectroscopy (TDLAS) was used to continuously measure the sublimation rate. As predicted, maximum product temperatures were controlled slightly below the target temperature of −25°C, and the cascading Tf-ramping cycle is the most efficient cycle design. In addition, the experimental cycle rank order closely matches with that determined by modeling. © 2009 Wiley-Liss, Inc. and the American Pharmacists Association J Pharm Sci 98:3469–3482, 2009

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Pharmaceutical Sciences - Volume 98, Issue 9, September 2009, Pages 3469–3482
نویسندگان
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