2009
DOI: 10.1590/s0103-50532009000500017
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Multiresidue determination of pesticides in drinking water by gas chromatography-mass spectrometry after solid-phase extraction

Abstract: Neste trabalho, um método usando extração em fase sólida e cromatografia a gás acoplada à espectrometria de massas no modo de monitoramento seletivo de íons, foi desenvolvido e validado para a determinação multiclasse de 20 pesticidas regulados pela legislação brasileira para água potável. Como estes pesticidas devem ser determinados em baixas concentrações, um elevado fator da pré-concentração associado à sensibilidade elevada da análise cromatográfica foi necessário. O método apresentou limites de quantifica… Show more

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Cited by 42 publications
(11 citation statements)
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“…The Oasis ® HLB polymeric sorbent was chosen due to its dual functionality, hydrophilic N-vinylpyrrolidone and lipophilic divinylbenzene, that provides an effective extraction of medium to high polarity compounds. 25,26 First, 25 mg of sorbent were weighed and transferred to an Eppendorf tube. Sample solution was adjusted to a pH of approximately 1-2 to increase retention of analytes due to the anionic exchange plus Van der Waals' interactions performed by the Oasis ® HLB in pH < 7, 27 until no color remained in the aqueous phase.…”
Section: Development Of the Extraction Methodsmentioning
confidence: 99%
“…The Oasis ® HLB polymeric sorbent was chosen due to its dual functionality, hydrophilic N-vinylpyrrolidone and lipophilic divinylbenzene, that provides an effective extraction of medium to high polarity compounds. 25,26 First, 25 mg of sorbent were weighed and transferred to an Eppendorf tube. Sample solution was adjusted to a pH of approximately 1-2 to increase retention of analytes due to the anionic exchange plus Van der Waals' interactions performed by the Oasis ® HLB in pH < 7, 27 until no color remained in the aqueous phase.…”
Section: Development Of the Extraction Methodsmentioning
confidence: 99%
“…Simultaneously with fish collection data from water quality at each study site were recorded in situ: pH, dissolved oxygen, temperature, salinity and conductivity, through Hanna ® HI 9828 multiparameter (approximately 20 cm deep). Additionally, samples of water were taken (one liter per sampling site packed in amber bottle) for determining the concentrations of pesticides, by high performance chromatography according to Sabin et al (2009) and Martins et al (2013).…”
Section: Methodsmentioning
confidence: 99%
“…A programação de temperatura do forno foi otimizada 14 e consiste em uma rampa de temperatura multilinear. A detecção foi realizada através do modo de monitoramento seletivo de íons no sistema GC-MS. 14,23 Os demais parâmetros do método são enfatizados na sequência.…”
Section: Otimização Do Sistema De Injeçãounclassified