“…Vibrational spectroscopy and multivariate data analysis (MVDA) technologies are attractive tools for real‐time monitoring of product quality attributes as they are non‐destructive, fast, and do not require any sample preparation (Rathore et al, 2010; Wasalathanthri et al, 2020; Wasalathanthri, Tewari, Kang, Hincapie, & Barrett, 2019). Techniques such as Raman and Fourier Mid Transform Infrared (Mid‐IR) spectroscopy allow in‐line integration of data acquisition probe into the process stream for real‐time monitoring lasting 10–20 s per measurement (Wasalathanthri et al, 2019, 2020). Mid‐IR spectroscopy, corresponds to about 800–4,000 cm −1 wavenumber region in electromagnetic radiation, for real‐time monitoring of product quality attributes and impurities in bioprocess has been previously reported at various unit operations.…”