Quechers extraction packets

Analytical grade buprofezin (99.00% purity, Cas No. 69327-76-0) was procured from Dr. Ehrenstofer GmbH (Augsburg, Germany). Acetonitrile (HPLC grade) for the standard dilutions, sample extraction, and the LC mobile phase for instrumental analysis, and HPLC grade formic acid (>98%) for the LC mobile phase were purchased from Merck (Darmstadt, Germany). QuEChERS extraction packets for sample extraction and d-SPE tubes for sample purification were purchased from Agilent Technologies (Santa Clara, CA, USA). Combi-514R (Hanil Scientific Inc., Gimpo, Korea) and Combi-408 (Hanil Scientific Inc., Gimpo Korea) centrifuges were used for 50- and 2-mL centrifuge tubes, respectively. The 2010 Geno/Grinder^® automated homogenizer (SPEX SamplePrep LLC, Metuchen, NJ, USA) was used for sample extraction. The 13-mm PTFE syringe filters were obtained from Advantec (Tokyo, Japan).

Analytical grade dinotefuran (98.5% purity), DN (98.5% purity), MNG (96.22% purity), UF (99.8% purity), fluazinam (99.89% purity), indoxacarb (96.1% purity), and thiacloprid (99.9% purity) were obtained from Dr. Ehrenstofer GmbH (Augsburg, Germany). Acetonitrile (HPLC grade) for standard dilutions, sample extraction, and the LC mobile phase were obtained from Merck (Darmstadt, Germany). HPLC-grade formic acid (> 98%) for the LC mobile phase was purchased from Merck (Darmstadt, Germany). Lead(II) acetate trihydrate was purchased from Daejung Chemicals (Iksan, Korea). The QuEChERS extraction packets and d-SPE tubes were obtained from Agilent Technologies (Santa Clara, CA, USA). Combi-514R (Hanil Scientific Inc., Gimpo, Korea) and Combi-408 (Hanil Scientific Inc., Gimpo Korea) centrifuges were used. A 2010 Geno/Grinder^® automated homogenizer (SPEX SamplePrep LLC., Metuchen, NJ, USA) was used for sample extraction. The rotary evaporator used EYELA N-1000 (EYELA, Tokyo, Japan).