Ten kinds of tablets, including ribavirin (100 mg ribavirin/piece), azithromycin dispersible (250 mg azithromycin/piece), oxytetracycline (250 mg oxytetracycline/piece), metronidazole (200 mg metronidazole/piece), isoniazid (100 mg isoniazid/piece), compound paracetamol (126 mg paracetamol/piece), salbutamol sulfate (2 mg salbutamol/piece), acyclovir (100 mg acyclovir/piece), theophylline sustained-release (100 mg theophylline/piece), and amantadine hydrochloride (100 mg amantadine hydrochloride/piece) were purchased from local pharmacies. High-purity argon (99.999%) was obtained from Juyang Gas Co., Ltd. (Changchun, China). Ultrapure water (resistivity 18.2 MΩ cm−1) was produced by a Milli-Q device (Thermo Scientific, San Jose, CA, USA).