Type 1 simplicity ultrapure water system

Four triazole herbicides (myclobutanil (C₁₅H₁₇ClN₄), triadimefon (C₁₄H₁₆ClN₃O₂), tebuconazole (C₁₆H₂₂ClN₃O), and hexaconazole (C₁₄H₁₇C_l2N₃O)) from Dr. Ehrenstorfer GmbH (Augsburg, Germany) were used. The stock solution of each fungicide (1000 mg L⁻¹) was prepared using methanol and used for further dilutions with water. Potassium hexafluorophosphate (KPF₆) (Sigma-Aldrich, Beijing, China) and tributyldodecylphosphonium bromide ([P₄₄₄₁₂]Br) (Sigma-Aldrich, Schaffhausen, Switzerland) were used. Methanol and acetonitrile (HPLC-grade) were obtained from Merck (Darmstadt, Germany). Deionized water with a resistivity of 18.2 MΩ·cm was obtained from a Type 1 Simplicity^® ultrapure water system (Merck, Darmstadt, Germany). All solutions were filtered through a 0.45 μm filter before being injected into the HPLC system. All chemicals and reagents mentioned above were of analytical grade.

All chemicals and reagents used in this work were of analytical grade. Five triazole fungicides (myclobutanil (MCBT), triadimefon (TDF), tebuconazole (TBZ), hexaconazole (HCZ), and diniconazole (DCZ)) from Dr. Ehrenstorfer GmbH (Augsburg, Germany)were used. Methanol (Merck, Darmstadt, Germany) was used to prepare the stock solution of each fungicide (1000 mg L⁻¹) and stored in refrigerator at 4 °C under light protection until analysis. HPLC-grade Methanol and acetonitrile were obtained from Merck (Darmstadt, Germany). 1-Undecanol and 1-dodecanol were purchase from Sigma-Aldrich (Darmstadt, Germany). Deionized water with the resistivity of 18.2 MΩ.cm was obtained from a Type 1 Simplicity^® ultrapure water system (Merck, Darmstadt, Germany). All solutions were filtered through a 0.45 μm nylon membrane filter before injected into the HPLC system.