Disodium hydrogen phosphate

Analytical grade methanol, acetonitrile, and water were purchased from Fisher Scientific (Pittsburgh, PA, USA). Reagent grade chemicals, including methoxyamine hydrochloride, pyridine, and N-methyl-N-(trimethylsilyl)-trifluoroacetamide (MSTFA), were obtained from Sigma Chemical Co. (St. Louis, MO, USA).
Analytical-grade chemicals, namely, acetic acid, 2,2-azinobis(3-ethylbenzothiazoline- 6-sulfonic acid) diammonium salt (ABTS), Folin–Ciocalteu’s phenol, formaldehyde solution, formic acid, methoxyamine hydrochloride, p-nitrophenol, p-nitrophenol β-d-glucopyranoside (p-NPG), potassium persulfate, pyridine, sodium hydroxide, sodium acetate, starch, N-methyl-N-(trimethylsilyl)trifluoroacetamide (MSTFA), 6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid (Trolox), and tyrosine were purchased from Sigma-Aldrich (St. Louis, MO, USA). Sodium carbonate, sodium dihydrogen phosphate, and disodium hydrogen phosphate were purchased from Junsei Chemical Co., Ltd. (Tokyo, Japan).

Potato dextrose agar media (Difco) was purchased from Junsei Chemical Co., Ltd. (Tokyo, Japan). HPLC-grade water, acetonitrile, and methanol were obtained from Fisher Scientific Co., Ltd. (Pittsburgh, PA, United States). Analytical-grade sodium dihydrogen phosphate, sodium chloride, sodium hydroxide, sodium carbonate, disodium hydrogen phosphate, and diethylene glycol were purchased from Junsei Chemical Co., Ltd. (Tokyo, Japan). All remaining analytical-grade reagents and standard compounds used in this study were obtained from Sigma-Aldrich (St. Louis, MO, United States).