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Enrichment of neonicotinoid insecticides from lemon juice sample with magnetic three‐dimensional graphene as the adsorbent followed by determination with high‐performance liquid chromatography
Author(s) -
Liu Li,
Feng Tao,
Wang Chun,
Wu Qiuhua,
Wang Zhi
Publication year - 2014
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.201301382
Subject(s) - neonicotinoid , thiacloprid , acetamiprid , chemistry , thiamethoxam , chromatography , detection limit , adsorption , clothianidin , solid phase extraction , extraction (chemistry) , high performance liquid chromatography , imidacloprid , desorption , pesticide , organic chemistry , agronomy , biology
A novel 3 D ‐graphene (3 D ‐ G ) magnetic nanomaterial was prepared and used as an adsorbent for the extraction of four neonicotinoid insecticides (acetamiprid, imidacloprid, thiacloprid, and thiamethoxam) from lemon juice sample. Then, HPLC with UV detection was applied for the determination of the neonicotinoid insecticides desorbed from the 3 D ‐ G magnetic nanomaterial. The main experimental parameters that affect the extraction efficiencies such as the amount of 3 D ‐ G magnetic nanomaterial, sample solution pH, extraction time, salting‐out effect, and desorption conditions were studied and optimized. As a result, the linear concentration range of the method was from 0.3 to 100.0 ng/mL for thiacloprid, from 0.5 to 100.0 ng/mL for imidacloprid and acetamiprid, and from 1.0 to 100.0 ng/mL for thiamethoxam, with correlation coefficients of 0.9965–0.9985, respectively. The LOD s of the method based on an S / N of 3 were between 0.08 and 0.2 ng/mL. The enrichment factors obtained were between 67 and 427, and the RSD s ( n = 6) were in the range from 4.6 to 7.1%, and the recoveries of the method fell in the range of 88.75 to 111.60%.