Analysis of pesticides in water by liquid chromatography‐tandem mass spectrometric techniques

Kuster, Marina; Alda, Miren López de; Barceló, Damià

doi:10.1002/mas.20093

Cited by 84 publications

(66 citation statements)

References 55 publications

(102 reference statements)

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“…The use of different types of detectors helps in the identification and quantification of compounds. 16 It is widely used nowadays due to its advantages in relation to gas chromatography (GC), since there is a trend towards the use of more polar pesticides (they are considered more readily degradable 17,18 and cannot be directly analyzed using GC at volatilization temperatures). Consequently, there is a need to develop methods using HPLC to determine these compounds and their metabolites.…”

mentioning

confidence: 99%

Distribution of pesticide residues in rice grain and in its coproducts

Dors

Prímel

Fagundes

et al. 2011

J. Braz. Chem. Soc.

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Os agrotóxicos são usados em muitas culturas para prevenir e preservar os grãos de possíveis ataques de pragas. O objetivo deste trabalho foi avaliar a distribuição dos agrotóxicos bispiribaque de sódio, carbofurano, clomazona e tebuconazol nas diferentes frações do arroz beneficiado (arroz branco, farelo de arroz, arroz com casca, arroz parboilizado beneficiado, farelo de arroz parboilizado e arroz parboilizado com casca), o qual foi cultivado em campos experimentais sob condições controladas de aplicação. Para tanto, o método QuEChERS foi otimizado para a extração dos agrotóxicos e validou-se um método utilizando CLAE-DAD para quantificação e CL-EM para confirmação. O método QuEChERS modificado foi adequado na extração dos agrotóxicos, bem como as condições cromatográficas para identificação e quantificação, conforme os indicativos de eficiência determinados: LOD de 0,07 mg kg -1 e LOQ de 0,2 mg kg -1 para a mistura dos agrotóxicos, e recuperação para arroz e farelo de arroz de 119 e 116%, 84 e 119%, 113 e 96%, 103 e 97% para carbofurano, bispiribaque de sódio, clomazona e tebuconazol, respectivamente. O método desenvolvido foi aplicado nas frações do beneficiamento e o farelo apresentou maior concentração de resíduo dos agrotóxicos, quando comparado ao arroz beneficiado, sendo 8,0, 2,3, 2,2 e 1,6 vezes mais contaminado, em média, para tebuconazol, clomazona, carbofurano e bispiribaque de sódio, respectivamente. Apenas o clomazona e o tebuconazol apresentaram concentrações dentro do limite aceitável estabelecidos pelo Codex Alimentarius (0,1 mg kg -1 ) para o arroz beneficiado nas safras analisadas.Pesticides are used to prevent pests from attacking grains in order to preserve the crops. This paper aims at evaluating the distribution of the pesticides bispyribac-sodium, carbofuran, clomazone and tebuconazole in different fractions of milled rice (white rice, rice bran, husked rice, parboiled rice, parboiled rice bran, and husked parboiled rice) which is planted on experimental fields under controlled conditions. The QuEChERS method was adapted to the extraction of pesticides and validated by using HPLC-DAD for quantification and LC-MS for confirmation. The analytical method of extracting pesticides, as well as the chromatographic conditions for identification and quantification, were suitable, according to certain efficiency indicators: 0.07 mg kg -1 LOD and 0.2 mg kg -1 LOQ for the mixture of pesticides and rice and rice bran recoveries of 119 and 116%, 84 and 119%, 113 and 96%, 103 and 97% for carbofuran, bispyribac-sodium, clomazone and tebuconazole, respectively. The method under development was applied to rice fractions: bran had the highest residue concentration of the studied pesticides, when compared to milled rice, showing 8.0, 2.3, 2.2 and 1.6 times more contamination, in average, with tebuconazole, clomazone, carbofuran and bispyribac-sodium, respectively. Only clomazone and tebuconazole were in the acceptable limits established by Codex Alimentarius (0.1 mg kg -1 ) for milled rice.

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mentioning

confidence: 99%

Distribution of pesticide residues in rice grain and in its coproducts

Dors

Prímel

Fagundes

et al. 2011

J. Braz. Chem. Soc.

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“…Method LOD values were below the maximum levels permitted for pesticides in surface waters, which are of 1 µg L -1 for individual pesticides and of 5 µg L -1 for total pesticides in water that will be destined for human consumption after treatment (Kuster et al, 2006). The analytical methods were validated and demonstrated to be accurate and efficient for the quantification of the selected herbicides.…”

Section: Sample Preparation and Determination Of Herbicides Residues mentioning

confidence: 97%

Herbicides Persistence in Rice Paddy Water in Southern Brazil

Zanella¹,

Adaime²,

Peixoto³

et al. 2011

Herbicides - Mechanisms and Mode of Action

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“…Além disso, a acidificação da fase móvel também auxilia na ionização dos analitos. 39,40 Ao se empregar a espectrometria de massas em série, através do modo de aquisição de monitoramento de reações múltiplas (MRM), é possível quantificar compostos que coeluem através do monitoramento das transições íon precursor -íon produto de cada substância. Assim, LC-MS/MS assegura a identificação com maior exatidão do que quando ela é feita apenas com base nas características de retenção das substâncias analisadas, como ocorre nas outras técnicas de detecção cromatográficas.…”

Section: Avaliação Da Vazão Da Fase Móvelunclassified

Otimização e validação de método empregando quechers modificado e lc-esi-ms/ms para determinação de agrotóxicos em cebola

et al. 2011

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. An evaluation of the pesticides extraction from onion using a modern sample preparation method (QuEChERS) and determination by liquid chromatography tandem mass spectrometry was carried out. All the calibration curves showed r>0.99. The recoveries ranged between 61.8 and 120.0% with relative standard deviation lower than 20% for all compounds. Due to the occurrence of matrix effect, the quantification was performed using matrix-matched calibration. The limits of quantification of the method were between 0.0005 and 0.05 mg kg -1 . The method shows the advantages of not require the clean-up step and consume low volume of organic solvents, decreasing time, costs and residues.

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Analysis of pesticides in water by liquid chromatography‐tandem mass spectrometric techniques

Cited by 84 publications

References 55 publications

Distribution of pesticide residues in rice grain and in its coproducts

Distribution of pesticide residues in rice grain and in its coproducts

Herbicides Persistence in Rice Paddy Water in Southern Brazil

Otimização e validação de método empregando quechers modificado e lc-esi-ms/ms para determinação de agrotóxicos em cebola

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