Analytical Method and Interlaboratory Study for the Quantitation of Aminocyclopyrachlor Residues in Vegetation by Liquid Chromatography/Tandem Mass Spectrometry
| Autor: | Edison Hidalgo, Tracy McLachlan, Amanda Krening, Robert M. Henze, Carol A Rodgers, Sergio C. Nanita, Dustin J Stewart, Thomas F Moate, David Robaugh, Emily Vogl, Erin C Robaugh, Randy Weintraub, Paul Reibach, Thomas Class, Timo Schwarz, Elen Tesfai, Anne M. Pentz, Christopher Lowrie |
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| Rok vydání: | 2013 |
| Předmět: |
Forage
Poaceae Quechers Trees Analytical Chemistry chemistry.chemical_compound Tandem Mass Spectrometry Liquid chromatography–mass spectrometry Environmental Chemistry Ions Pharmacology Residue (complex analysis) Chromatography Herbicides Chemistry Pesticide Residues Reproducibility of Results Vegetation Pesticide Chromatography Ion Exchange Plant tissue United States Pyrimidines Calibration Aminocyclopyrachlor Laboratories Agronomy and Crop Science Filtration Chromatography Liquid Environmental Monitoring Food Science |
| Zdroj: | Journal of AOAC INTERNATIONAL. 96:1473-1481 |
| ISSN: | 1944-7922 1060-3271 |
| DOI: | 10.5740/jaoacint.12-349 |
| Popis: | The quick, easy, cheap, effective, rugged, and safe (QuEChERS) and the U. S. Food and Drug Administration pesticide multiresidue methods were systematically tested for the analysis of aminocyclopyrachlor, a new synthetic auxin herbicide. Results revealed that these procedures are not suitable, highlighting the need for a publicly available residue method for this new active ingredient. Such a method has been developed and is reported herein for aminocyclopyrachlor residue analysis in vegetation, including white pine, Norway spruce, grass forage, and grass hay. Aminocyclopyrachlor residues were purified from plant tissue extracts by filtration through SPE cartridges with strong anion exchange stationary phases and analyzed using LC/MS/MS. This method was validated at five laboratories across the United States; their results were compared to evaluate reproducibility and ruggedness. The method LOQ was 0.01 mg/kg (ppm) and the LOD 0.003 mg/kg (ppm) for the matrixes tested. A qualitative procedure to confirm the molecular identity of residues based on retention time measurements and ion transition peak area ratios (m/z 214 → 68/m/z 214 → 101) is also presented. |
| Databáze: | OpenAIRE |
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