Abstract：
:A method using dispersive solid-phase extraction and dispersive liquid-liquid micro-extraction cleanup followed by high performance liquid chromatography (HPLC) has been established for determination of seven neonicotinoid insecticides residues in grains including brown rice, maize, millet and oat. Based on an appraisal of the characteristics of HPLC, validation experiments were conducted for seven neonicotinoid insecticides. In the method, dispersive solid-phase extraction was carried out using PSA and bonded C18 coupled with graphitised carbon black with acetonitrile as the eluted solvent. In the linear range of each pesticide, the correlation coefficient was R(2) ≥ 0.99. At the low, medium and high three fortification levels of 0.05-0.8 mg kg(-1), recoveries fell within 76-123%. The relative standard deviation was between 0.9% and 12.6% for seven neonicotinoid pesticides. Low limits of detection (0.002-0.005 mg kg(-1)) and quantification (0.007-0.018 mg kg(-1)) were readily achieved with this method for all tested pesticides.
journal_name
Food Chemjournal_title
Food chemistryauthors
Wang P,Yang X,Wang J,Cui J,Dong AJ,Zhao HT,Zhang LW,Wang ZY,Xu RB,Li WJ,Zhang YC,Zhang H,Jing Jdoi
10.1016/j.foodchem.2012.03.103subject
Has Abstractpub_date
2012-10-01 00:00:00pages
1691-8issue
3eissn
0308-8146issn
1873-7072pii
S0308-8146(12)00586-9journal_volume
134pub_type
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