Determination of 40 currently used pesticides in airborne particulate matter (PM 10) by microwave-assisted extraction and gas chromatography coupled to triple quadrupole mass spectrometry

The role of GC-MS/MS with triple quadrupole in pesticide residue analysis in food and the environment

“…Although the EI mode was used for the general method, a supplementary methodology based on GC-(NCI) MS using the selected ion recording (SIR) mode was proposed for quantification and confirmation of OC pesticides as it allowed notable sensitivity improvement for these compounds. As regards confirmation identity, it is based on the presence of at least two SRM transitions 25,71,72,76,77,79 and R t agreement, although several authors also took into account the experimental relative intensity ratio of the sample and the theoretical ratio of the reference standard, using the maximum deviations established in the European The GC-MS/MS methods applied in the analysis of environmental samples presented excellent sensitivity. In the case of soils and sediments, the lowest level validated was as low as 1 ng g −176 or 5 ng g −1 .…”

“…25,69 The purity of the air was evaluated by analyzing the airborne particulate matter performing the validation at the lowest level of 10 ng mL −1 . 71 As regards water samples, the lowest level validated is reported to be 0.14 ng L −1 for a variety of priority organic pollutants. 73 As expected, the lowest level validated in waste water was much higher, as a consequence of the higher matrix complexity.…”

“…Only eighteen publications have been found and among them eleven developed analytical methodology for the determination of multiclass pesticides. [65][66][67][68][69][70][71][72][73][74][75] Only two articles deal with around hundred target analytes: Barco-Bonilla et al 67 included 139 analytes in waste water samples analysis and Martínez Vidal et al 69 included 98 pesticides in soil analysis.…”

Electrochemical and Quantum Chemical Investigations of the Insecticide Fipronil

“…Chromatographic techniques are the most commonly used tools to determine pesticide residues. [7][8][9][10][11] In recent years pre-concentration methods and sample cleanup steps such as quick, easy, cheap, effective, rugged and safe (QuEChERS), 12 microwave assisted extraction, 13 extraction with an ionic liquid, 14 solid phase extraction, 15 solid phase microextraction 16 and matrix solid phase dispersion 17 were employed with good results. No electroanalytical procedure was found in literature for the fipronil determination.…”

DETERMINATION OF PESTICIDE RESIDUES IN BOVINE MILK USING A MODIFIED QuEChERS METHOD AND GC-MS/MS

“…30 O emprego da cromatografia gasosa acoplada à espectrometria de massas em série (GC-MS/MS, do inglês gas chromatography with tandem mass spectrometry) possibilita um grande aumento de seletividade e da detectabilidade. 31 Na varredura de monitoramento do íon selecionado (SRM do inglês, selected reaction monitoring) monitora-se a fragmentação de um íon precursor selecionado no Q1 e seus correspondentes íons produtos que são filtrados em Q3. A ausência da varredura permite que o equipamento focalize apenas o precursor e o produto, aumentando a sensibilidade para o monitoramento, que é associado a um aumento na seletividade.…”