“…To date, various MS‐based testing items have been established in clinics, including newborn screening (Dodds & Baker, 2021; Kilgore et al, 2023), microbe identification (Sandrin & Demirev, 2018; Sauer & Kliem, 2010), and therapeutic drug monitoring (TDM) (Cao et al, 2022; Kim et al, 2021). In the period of the COVID‐19 pandemic, MS was also used for the diagnosis of SARS‐CoV‐2 (Cardozo et al, 2020; Wong et al, 2022; Yoshinari et al, 2022). Despite its outstanding performance in clinical diagnosis and therapy, current clinical MS greatly depends on lab‐scale mass spectrometers typically coupled with gas chromatography (GC) or liquid chromatography (LC) (Maekawa & Mano, 2022; Thomas et al, 2022).…”