Validation and Uncertainty of the method for multiresidue analysis of 35 pesticides in melon using Gas Chromatography Coupled to Quadrupole Mass Spectrometry (GC-QP/MS)

7th Brazilian Congress on Metrology

Milhome, M.A.L.^1,2 ; Sousa, J.S.^1 ; Andrade, G.A.^2 ; De Castro, R.C.^2 ; Lima, L.K.^2 ; Lima, C.G.^2 ; Nascimento, R.F.^1

Departamento de Química Analitica e Físico-Química, Universidade Federal Do Ceara, Campus Do Pici, R. Humberto Monte, S/N, Bl. 935, CEP, Fortaleza-CE

60451-970, Brazil^1

Fundação Núcleo de Tecnologia Industrial Do Ceará, NUTEC, Campus Do Pici, R. Rômulo Proença S/N CEP, Fortaleza-CE

60451-970, Brazil^2

关键词: Accuracy and precision;    Concentration ranges;    Limit of quantifications;    Multi-residue analysis;    Quadrupole mass spectrometry;    Relative standard deviations;    Relative uncertainty;    Validation parameters;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/575/1/012032/pdf
DOI  :  10.1088/1742-6596/575/1/012032

来源: IOP

【 摘 要 】

QuEChERS method and detection in GC/SQ-MS were validated for the analysis of 35 pesticides in melon. Validation parameters (selectivity, linearity, LOD, LOQ, accuracy and precision) were determined according ABNT NBR 14029:2005. The recoveries rates for all the pesticides studied were from 63% to 117% with relative standard deviation (RSD) lower than 15% in the concentration range of 0.05-0.20 mg/kg. The limit of quantification (LOQ) for most compounds were below the MRLs established in Brazil. The combined relative uncertainty (Uc) and expanded uncertainty (Ue) was determined using repetitivity, recovery and calibration curves data for each pesticide.