Butachlor

Glutathione (reduced form, GSH), 1-chloro-2,4-dinitrobenzene (CDNB), acetochlor, butachlor, metazachlor, and bovine serum albumin (BSA, fraction V) were purchased from Sigma-Aldrich (St. Louis, MI, USA). Alachlor and malathion were purchased from Fluka (Darmstadt, Germany). Other pesticides were obtained from Riedel de Haen (Hanover, Germany).

Bifenthrin (purity; 99.0%), butachlor (95.9%) standards, and ammonium formate (10 M) were purchased from Sigma-Aldrich (St. Louis, MO, USA). Commercial pesticide products were Talstar [Bifenthrin 1 EC (NongHyup Chemical Co., Ltd., Seongnam, Korea)] and Macet [butachlor 5 GR (FarmHannong Co., Ltd., Seoul, Korea)]. HPLC grade acetonitrile (MeCN) and ethyl acetate (EA) were obtained from Samchun Chemical (Seoul, Korea) and from Duksan Pure Chemical (Seoul, Korea), respectively. LC–MS grade methanol (MeOH) and formic acid (>99%) were purchased from Thermo Fisher Scientific (Waltham, MA, USA). LC–MS grade water was obtained from Merck (Darmstadt, Germany). Acetic acid (99.5%) was purchased from Junsei Chemical Co., Ltd. (Tokyo, Japan). QuEChERS extraction original kit (4 g of magnesium sulfate; MgSO₄ and 1g of sodium chloride; NaCl), EN 15662 kit (4 g of MgSO₄, 1 g of NaCl, 1 g of sodium citrate; Na₃Citr·2H₂O, and 0.5 g of sodium hydrogen citrate sesquihydrate; Na₂HCitr·1.5H₂O), d-SPE, PSA (25 mg of PSA and 150 mg of MgSO₄), and GCB (25 mg of PSA, 7.5 mg of bulk carbonate, and 150 mg of MgSO₄) were obtained from Agilent Technologies (Santa Clara, CA, USA). Oasis PRiME HLB cartridge plus light (100 mg) was purchased from Waters Corporation (Milford, MA, USA).

Reduced glutathione (GSH), 1-chloro-2,4-dinitrobenzene (CDNB), bovine serum albumin (BSA), kanamycin, acetochlor, butachlor, metazachlor and propachlor were obtained from Sigma-Aldrich Co. (St. Louis, MO, USA). The pesticides alachlor and malathion were obtained from Fluka. The rest of the pesticides were purchased from Riedel de Haen (Seelze, Germany).