Abstract

RODRIGUEZ VALDES, Osvaldo Nicolás; VELAZQUEZ CHONG, Laura Renné; SOTO ALVARADO, Sonia del Carmen  and  RODRIGUEZ VENTURA, Guillermo. 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. Vet. Méx [online]. 2011, vol.42, n.2, pp.101-113. ISSN 0301-5092.

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 CC_α and detection capability CC_β 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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