Streamlined sample cleanup using combined dispersive solid-phase extraction and in-vial filtration for analysis of pesticides and environmental pollutants in shrimp.
A new method of sample preparation was developed and is reported for the first time. The approach combines in-vial filtration with dispersive solid-phase extraction (d-SPE) in a fast and convenient cleanup of QuEChERS (quick, easy, cheap, effective, rugged, and safe) extracts. The method was applied to simultaneous analysis of 42 diverse pesticides and 17 environmental contaminants, including polycyclic aromatic hydrocarbons, polychlorinated biphenyls (PCBs), and flame retardants, in shrimp as the sample matrix. Final extracts were analyzed by both low-pressure gas chromatography - triple quadrupole tandem mass spectrometry (LPGC-MS/MS), and high-performance liquid chromatography - triple quadrupole tandem mass spectrometry (HPLC-MS/MS) to provide a wide scope of analysis for targeted analytes. During method development, several different commercial sorbents for d-SPE were investigated and compared with respect to analyte recoveries. The method was validated at 10, 50, and 100 ng g(-1) spiking levels (10-fold lower for PCBs), and the results for nearly all analytes were between 70 and 115% recoveries with ≤17% relative standard deviations. The method was shown to be simple, fast, and effective for multi-application analysis of chemical residues in the representative food and environmental marker matrix.
College of Science, China Agricultural University, Beijing, China.
Lijun
L
Han
U.S. Dept. of Agriculture, Agricultural Research Service, Eastern Regional Research Center; 600 East Mermaid Lane, Wyndmoor, PA 19038, USA.
Yelena
Y
Sapozhnikova
U.S. Dept. of Agriculture, Agricultural Research Service, Eastern Regional Research Center; 600 East Mermaid Lane, Wyndmoor, PA 19038, USA. Electronic address: Steven.Lehotay@ars.usda.gov.
Steven J
SJ
Lehotay
D053000:Analytic Sample Preparation Methods; D000818:Animals; D033364:Decapoda / Q000737:chemistry*; D004785:Environmental Pollutants / Q000032:analysis / Q000302:isolation & purification; D005374:Filtration / Q000379:methods*; D005506:Food Contamination / Q000032:analysis*; D010573:Pesticide Residues / Q000032:analysis* / Q000302:isolation & purification*; D012758:Shellfish / Q000032:analysis*; D052616:Solid Phase Extraction / Q000379:methods*
D004785:Environmental Pollutants; D010573:Pesticide Residues
Environmental contaminants; Filter-vial dispersive solid-phase extraction; Pesticide residue analysis; QuEChERS; Shrimp