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In Situ Raman Spectroscopy for Simultaneous Monitoring of Multiple Process Parameters in Mammalian Cell Culture Bioreactors

机译:同时监测哺乳动物细胞培养生物反应器中多个工艺参数的原位拉曼光谱

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摘要

In this study, the application of Raman spectroscopy to the simultaneous quantitative determination of glucose, glutamine, lactate, ammonia, glutamate, total cell density (TCD), and viable cell density (VCD) in a CHO fed-batch process was demonstrated in situ in 3 L and 15 L bioreactors. Spectral preprocessing and partial least squares (PLS) regression were used to correlate spectral data with off-line reference data. Separate PLS calibration models were developed for each analyte at the 3 L laboratory bioreactor scale before assessing its transferability to the same bioprocess conducted at the 15 L pilot scale. PLS calibration models were successfully developed for all analytes bar VCD and transferred to the 15 L scale.
机译:在这项研究中,原位证明了拉曼光谱在同时定量测定CHO补料分批过程中葡萄糖,谷氨酰胺,乳酸,氨,谷氨酸,总细胞密度(TCD)和活细胞密度(VCD)中的应用。在3 L和15 L生物反应器中。光谱预处理和偏最小二乘(PLS)回归用于将光谱数据与离线参考数据相关联。针对每种分析物在3 L实验室生物反应器规模下开发了单独的PLS校准模型,然后评估其在15 L中试规模下进行的同一生物过程的可转移性。已成功为VCD上的所有分析物开发了PLS校准模型,并将其转换为15 L刻度。

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