Development and validation of an analytical method for the detection and quantification of organochlorine pesticides in pork fat with a GC/PTV/EI/MS² system

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Osvaldo Nicolás Rodríguez Valdés
Laura Renné Velázquez Chong
Laura Renné Velázquez Chong
Sonia del Carmen Soto Alvarado
Sonia del Carmen Soto Alvarado
Guillermo Rodríguez Ventura
Guillermo Rodríguez Ventura

Abstract

A capillary gas chromatography/mass spectrometry method was developed based on the requirements of the NMX-EC-17025-IMNC-2006/ISO/IEC17025:2005 and the Commission Decision 2002/657/EC in what regards to organochlorine pesticides measurement in swinish livestock fat: α-BHC, γ-BHC (lindane), β-BHC, δ-BHC, heptachlor, aldrin, heptachlor epoxide, γ-chlordane, α-chlordane, endosulfan I, p,p'-DDE, dieldrin, endrin, endosulfan II, p,p'-DDD, endrin aldehyde, p,p'-DDT, endosulfan sulfate, methoxychlor and mirex, in order to suggest a technological alternative that the NOM-021-ZOO-1995 may determine, and fulfill the NOM-004-ZOO-1994. The optimization in the selection of the precursor ion for each pesticide was done changing the pressure in the ion trap increasing the ions product signals, and achieving MS² measurements with higher sensitivity that overcome to electronic capture detectors (ECD). The decision limit CCα and detection capability CCβ fulfilled the maximum residue limits (MRL) for both regulations with r ≥ 0.990 and recoveries between 70-110%.
Keywords:
PORCINE FAT ORGANOCHLORINE PESTICIDES ANALYTICAL METHOD ION TRAP GC/PTV/EI/MS²

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