1 2 dichlorobenzene

Propylparaben, chlorobenzene, 1,2,4-trichlorobenzene, ethylbenzene, n-propylbenzene, n-butylbenzene, 3-aminopropyltriethoxysilane (APTES), phenol, 2,4-dimethylphenol, 2,4-dichlorophenol and glutaraldehyde solution (25%, V/V in water) were obtained from Aladdin Reagent Factory (Shanghai, China). Methylbenzene, 1,2-dichlorobenzene, sodium hydroxide (NaOH), thiourea, 1,4-dioxane, hydrochloric acid (HCl), sodium phosphate dibasic dodecahydrate (Na₂HPO₄·12H₂O), and acetic acid (CH₃COOH) were purchased from Sinopharm Group Chemical Reagent Co., Ltd. (Shanghai, China). Methylparaben and TAPB were obtained from Bidepharm (Shanghai, China). Ethylparaben, ibuprofen, and BPTA were purchased from Mackin (Shanghai, China). Flurbiprofen was purchased from HEOWNS (Tianjin, China). Diclofenac sodium was obtained from TCI (Shanghai, China). Phosphoric acid (H₃PO₄) was purchased from RHAWN (Shanghai, China). Acetonitrile and methanol were obtained from Tedia (Cincinnati, Ohio, USA). Fused silica capillaries (50 μm i.d. and 365 μm o.d.) were purchased from Ruifeng Chromatographic Devices (Yongnian, Hebei, China).