Determination of multi-class pesticides in wines by solid-phase extraction and liquid chromatography-tandem mass spectrometry

Economou, Anastasios; Botitsi, Helen; Antoniou, Spyros; Tsipi, Despina

doi:10.1016/j.chroma.2009.06.031

Cited by 250 publications

(136 citation statements)

References 18 publications

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“…Oasis HLB and Sep-pak Vac C 18 cartridges have been well-studied and proven to adsorb many kinds of organic micropollutants in water or other environmental media, and have been widely applied to recover agricultural chemicals (Economou et al, 2009), pharmaceuticals (Vazquez-Roig et al, 2010Huerta-Fontela et al, 2010), endocrine-disruptors (Pedrouzo et al, 2009), and brominated flame retardants (Ramos et al, 2007) from complex environmental water samples. The HLB and C 18 cartridges were respectively eluted with 10 mL acetone at 2.0 mL/min.…”

Section: Pretreatment Processmentioning

confidence: 99%

Toxicity-based assessment of the treatment performance of wastewater treatment and reclamation processes

Wei

Tan

2012

Journal of Environmental Sciences

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The reclamation and reuse of wastewater is one of the possible ways to relieve the serious fresh water resource crisis in China. Efficient reclamation treatment technologies ensure the safe reuse of reclaimed water. In order to screen out and evaluate technologies appropriate for reclamation treatment, a great deal of efforts have been brought to bear. In the present study, a toxicity-based method including a Photobacterium phosphoreum test for acute toxicity and SOS/umu test for genotoxicity, accompanied by the traditional physicochemical parameters DOC (dissolved organic carbon) and UV 254 (absorbance at 254 nm), was used to measure the treatment performance of different reclamation processes, including the anaerobic-anoxic-oxic biological process (A 2 O) and subsequent physical/chemical reclamation processes (ultrafiltration, ozonation, chlorination). It was found that for the secondary effluent after the A 2 O process, both the toxicity and physicochemical indices had greatly decreased compared with those of the influent. However, chemical reclamation processes such as ozonation and chlorination could possibly raise toxicity levels again. Fortunately, the toxicity elevation could be avoided by optimizing the ozone dosage and using activated carbon after ozonation. It was noted that by increasing the ozone dosage to 10 mg/L and employing activated carbon with more than 10 min hydraulic retention time, toxicity elevation was controlled. Furthermore, it was shown that pre-ozonation before activated carbon and chlorination played an important role in removing organic compounds and reducing the toxicity formation potential. The toxicity test could serve as a valuable tool to evaluate the performance of reclamation processes.

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Section: Pretreatment Processmentioning

confidence: 99%

Toxicity-based assessment of the treatment performance of wastewater treatment and reclamation processes

Wei

Tan

2012

Journal of Environmental Sciences

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“…Após os procedimentos analíticos estabelecidos, eles foram validados em termos de (i) adequação do modelo matemático linear (faixa linear de trabalho) para o intervalo de concentração das curvas analíticas e da sua significância estatística pela ANOVA; 27 (ii) dos limites de detecção e quantificação a partir dos parâmetros das equações de regressão; 28 e (iii) do efeito matriz, 29,30 para o método cromatográfico. Para os procedimentos de preparação das amostras com e sem utilização de SPE, foram verificadas a recuperação do LAS, os surrogates e a precisão dos métodos.…”

Section: Validação Dos Métodos Analíticosunclassified

Quantificação de alquilbenzeno linear sulfonato em estação de tratamento de efluentes e rios por cromatografia líquida de alta eficiência e extração em fase sólida

Silva¹,

Gavazza²,

Florêncio³

et al. 2017

Quim. Nova

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Recebido em 28/06/2016; aceito em 21/12/2016; publicado na web em 05/02/2017 QUANTIFICATION OF LINEAR ALKYLBENZENE SULFONATE IN SEWAGE TREATMENT PLANTS AND RIVERS BY HIGH PERFORMANCE LIQUID CHROMATOGRAPHY AND SOLID PHASE EXTRACTION. The procedures to implement a chromatographic method for the quantification of linear alkyl benzene sulfonate (LAS) in the influent, effluent and sludge of a wastewater treatment plant (WWTP), and in river water and sediment, are described and evaluated. The columns octylsilane (C 8 ) and octadecylsilane (C 18 ) for high performance liquid chromatography were evaluated for separation of LAS homologues. The results showed that both columns separated the four homologues, but C 18 was better for separation of the isomers of each homologue. This enabled to qualitatively evaluate the degradation of homologues in the WWTP, according to their respective isomers. Samples pretreatment by solid phase extraction (SPE) columns, strong anionic exchange (SAX) and C 18 , was also evaluated. SPE was necessary for water river samples, either to concentrate LAS or to remove interference in the matrix; however, for WWTP samples, SPE showed unnecessary. The recovery of LAS homologues, after the procedures for sample preparation, was 90 to 110% with an accuracy of 1 to 5%. The WWTP was efficient in LAS removal from domestic sewage; however, the concentrations in water and sediments of the receiving body were higher than the limits established by legislation due to illegal discharges of untreated sewage.Keywords: LAS homologues and isomers; anaerobic treatment; validation of chromatographic method; SPE pre-treatment. INTRODUÇÃOAlquilbenzeno linear sulfonato (LAS -linear alkylbenzene sulfonate) é o tensoativo aniônico mais utilizado como princípio ativo dos detergentes e sabões em pó, e por isso, o de maior produção (3 milhões de toneladas em 2000) e consumo mundial (18,2 milhões de toneladas em 2003). O produto comercial é uma mistura de homólogos e isômeros de posição com cadeias lineares contendo de 10 a 14 átomos de carbono e foi introduzido no mercado como substituto biodegradável do alquilbenzeno sulfonato (ABS -alkylbenzene sulfonate). 1,2 O LAS é produzido pela sulfonação do alquilbenzeno linear (LAB -linear alkylbenzene), obtido pela alquilação de Friedel Crafts. Neste processo são usados diferentes catalisadores, alterando o percentual dos isômeros e, consequentemente, a viscosidade, a solubilidade e a aplicação do produto final. Quando o ácido fluorídrico é utilizado como catalisador, o percentual dos isômeros em cada homólogo é quase equivalente (17 a 20%); e quando o cloreto de alumínio é utilizado, são produzidos, majoritariamente, os isômeros 2-fenil (2Ø) (30%), seguido do 3Ø (20%) e decrescendo gradualmente para os isômeros 4Ø a 6Ø (15 a 16%). 1,3 O maior consumo doméstico de LAS tem provocado o aumento das suas concentrações em esgotos sanitários (1 a 15 mg L -1 ) que chegam nas estações de tratamento (ETE) ou nas águas de rio, bem como nos lodos de ETE (<1 a 10 g kg -1 de matéria seca) ...

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“…However, a significant number of OPs which are widely used give significantly lower detection limits with LC/MS/MS (Table 1). In addition GC/MS methods suffer from poor chromatographic performance, low sensitivity, and required derivatization for OP transformation products, whereas LC/MS/MS can be used to simultaneous analyze the OP transformation products including OP oxons with detection limits of 0.06-0.38 µg/L (Raina and Sun, 2008) and OP sulfones and sulfoxides (Chung and Chan, 2010;Jansson et al, 2004;Hiemstra et al, 2007;Economou et al, 2009). For some pyrethroids GC/EI-MS has approximately 100 times higher detection limits than LC/MS/MS (Alder et al, 2006) while for many they are comparable (Yoshida et al, 2009).…”

Section: Gc/ms and Gc/ms/ms Methodsmentioning

confidence: 99%

“…However these chloro and nitrophenols have also been analyzed successfully by APCI (Silgoner et al, 1997). OP degradation products including 3,5,6-trichloro-2-pyridinol, diethyl phosphate, 2-isopropyl-6-methyl-4-pyrimidinol, malathion monocarboxylic acid, and OPoxons (Raina and Sun, 2008) as well as OP sulfones and sulfoxides (Jansson et al, 2004;Chung andChang, 2010, Hiemstra et al, 2007;Economou et al, 2009) are more sensitive with LC-ESI + /MS/MS and some OPs observe a drastic loss in sensitivity with an APCI source at high flow rates (Asperger et al, 2001). Degradation products of triazines and phenylureas have been done by LC-APCI + /MS/MS but for triazines lower MDLs can be achieved with GC-EI/MS/MS (Dagnac et al, 2005;Goncalves et al, 2006).…”

Section: Phenylurea Transformation Productsmentioning

confidence: 99%

Chemical Analysis of Pesticides Using GC/MS, GC/MS/MS, and LC/MS/MS

Raina¹

2011

Pesticides - Strategies for Pesticides Analysis

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Determination of multi-class pesticides in wines by solid-phase extraction and liquid chromatography-tandem mass spectrometry

Cited by 250 publications

References 18 publications

Toxicity-based assessment of the treatment performance of wastewater treatment and reclamation processes

Toxicity-based assessment of the treatment performance of wastewater treatment and reclamation processes

Quantificação de alquilbenzeno linear sulfonato em estação de tratamento de efluentes e rios por cromatografia líquida de alta eficiência e extração em fase sólida

Chemical Analysis of Pesticides Using GC/MS, GC/MS/MS, and LC/MS/MS

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