Bispyribac sodium

Cyromazine (98.5%), bispyribac sodium, diquate dibromide, melamine, acetamipride, dinotefuran, imidachloprid, flucarbazone, and atrazine were purchased from Dr. Ehrenstorfer GmbH (Stuttgart, Germany). Polyaniline (emeraldine salt) (Average M_w > 15,000, 3–100 μm particle size), methacrylic acid (MAA), ethylene glycol dimethacrylate (EGDMA), benzoyl peroxide (BPO), potassium tetrakis (3,5-bis (trifluoromethyl) phenyl) borate (KTFPB), and acetonitrile were purchased from Sigma-Aldrich Inc. (St. Louis, MO, USA). High molecular weight poly(vinyl chloride) (PVC), sodium tetraphenyl borate (NaTPB), dioctyl phthalate (DOP), and tetrahydrofuran (THF) were obtained from Fluka AG (Buchs, Switzerland). Tetrahydrofuran (THF) was freshly distilled prior to use. For pesticide technical formulation, a nominee-kz, 3% soluble liquid (SL) of Cyromazine, was purchased from Kafr El-Zayat Pesticides and Chemicals Company (Gharbia, Egypt). All other chemical reagents were of analytical grade and used without any further purification. A stock Cyromazine solution (10⁻² M) was prepared by dissolving 0.166 g pure Cyromazine in 100 mL distilled water and the pH of the solution was adjusted to pH 3.5 using 0.1 M acetic acid. Dilutions of CYR (10⁻³–10⁻⁷ M) were prepared in 50 mM acetate solution, pH 3.5.

Bispyribac sodium (99%), Diquate dibromide (98.3%), Dimethoate (98%) and Cyromazine (98.5%) were purchased from Dr. Ehrenstorfer GmbH (Germany). Methomyl (98.5%) and Oxamyl (99%) were purchased from Fluka (Ronkonkama, NY). Polyaniline (emeraldine salt) (average M_w > 15,000, 3–100 μm particle size), methacrylic acid (MAA), ethylene glycol dimethacrylate (EGDMA), acetonitrile and benzoyl peroxide (BPO) were purchased from Sigma-Aldrich Inc. (St. Louis, MO, USA). Aliquat 336 was purchased from Acros (Spain). High molecular weight poly (vinylchloride) (PVC), dioctyl phthalate (DOP) was obtained from Fluka AG (Buchs, Switzerland). Tetrahydrofuran (THF) was freshly distilled prior to use. For pesticide technical formulation, a Nominee-kz, 3% soluble liquid (SL) of Bispyribac sodium, was purchased from Kafr El-Zayat Pesticides& Chemicals Company (Gharbia, Egypt). All other chemical reagents were of analytical grade and used without any further purification.
A stock Bispyribac sodium solution (10⁻² M) was prepared by dissolving 0.45 g pure Bispyribac sodium in 100 mL distilled water. Working solutions (10⁻²–10⁻⁶ M) were prepared by accurate dilutions and stored in brown bottles.