Persistence of selected pesticides and their phenolic transformation products in natural waters using off-line liquid solid extraction followed by liquid chromatographic techniques

Castillo, M.; Domingues, Rodrigo Rodrigues; Alpendurada, M.F.; Barceló, Damià

doi:10.1016/s0003-2670(97)00353-x

Cited by 104 publications

(44 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Moreover, the photodegradation was conducted using a very low concentration of fenitrothion (0.01 mg/l), so in this way, the behavior of fenitrothion reflects more closely the degradation kinetics in the real environmental situation compared to previous studies (Greenhalgh and Marshall, 1976;Mikami et al, 1985;Durand et al, 1992Durand et al, , 1994Kerzhentsev et al, 1996;Castillo et al, 1997). Beside that, 3-methylphenol was identified as a new photoproduct of fenitrothion in the present study.…”

Section: Fig 2 Ei Mass Spectra Of Different Compounds Identified Inmentioning

confidence: 51%

“…The previous reactions illustrate that oxidation, isomeration, chemical hydrolysis, dealkylation, and denitration are considered to be the degradation routes of fenitrothion in water (Durand et al, 1992(Durand et al, , 1994Lacorte and Barcelo, 1994;Kerzhentsev et al, 1996;Castillo et al, 1997). These chemical processes were identically induced under both direct and indirect photolysis, which reveal no specific attachment of the hydroxyl radical generated through the photolysis of nitrate under indirect photolysis in fenitrothion phototransformation.…”

Section: Fig 2 Ei Mass Spectra Of Different Compounds Identified Inmentioning

confidence: 97%

“…3. Fenitrooxon and s-methylfenitrothion seem to be the primary products of fenitrothion, fenitrooxon was formed by substitution of sulfur by oxygen in the P=S bond, through the oxidation, while the s-methylfenitrothion is formed by isomeration, which is induced by heat (Durand et al, 1994;Lacorte and Barcelo, 1994;Castillo et al, 1997). Formylfenitrothion was formed through the oxidation of hydroxymethyl-fenitrothion, which results from the oxidation of the aryl methyl group of fenitrothion.…”

Section: Fig 2 Ei Mass Spectra Of Different Compounds Identified Inmentioning

confidence: 99%

“…The selection of these photoproducts was, firstly, based on the fact that they possess a significant toxicity to the aquatic environment, sometimes more than the fenitrothion (Eto, 1974;Amoros et al, 2000). Secondly, they are considered to be the most common photoproducts of fenitrothion, formed under both photolysis and photocatalytic degradation (Durand et al, 1992(Durand et al, , 1994Kerzhentsev et al, 1996;Castillo et al, 1997). Thirdly, these photoproducts were previously detected associated with the fenitrothion in both river and rice field water samples after the aerial application of fenitrothion (Lacorte and Barcelo, 1994;Oubina et al, 1996).…”

Section: Effects Of Fenitrothion and Two Of Its Photoproducts On Stermentioning

confidence: 99%

See 3 more Smart Citations

Photodegradation kinetics of fenitrothion in various aqueous media and its effect on steroid hormones biosynthesis

et al. 2004

View full text Add to dashboard Cite

The photodegradation kinetics of fenitrothion in various water media were examined under both direct and indirect photolysis with respect to degradation rate, half-life, and phototransformation kinetics of fenitrothion. The effect of fenitrothion and its photoproducts on steroid hormone biosynthesis was also investigated. The results indicate that the degradation rate of fenitrothion under indirect photolysis to which nitrate was added was faster than that of direct photolysis, in both pure and natural water. The fenitrothion half-lives under indirect photolysis were 2.67 and 4.58 h, while under direct photolysis the half-lives were 3.58 and 5.66 h for natural and pure water, respectively. The phototransformation kinetics of fenitrothion in pure water showed that the identified photoproducts, such as fenitrooxon and 3-methyl-4-nitrophenol, under both direct and indirect photolysis were almost the same. This is evidence that there is no specific degradation pathway with hydroxyl radicals under indirect photolysis in fenitrothion transformation. The 1 µM~50 µM levels of fenitrothion and two of its photoproducts (fenitrooxon and 3-methyl-4-nitrophenol) altered the steroid hormones biosynthesis in bovine adrenal cultured cells, which suggests that both fenitrothion and its two photoproducts may be endocrine-disrupting compounds.

show abstract

Section: Fig 2 Ei Mass Spectra Of Different Compounds Identified Inmentioning

confidence: 51%

Section: Fig 2 Ei Mass Spectra Of Different Compounds Identified Inmentioning

confidence: 97%

Section: Fig 2 Ei Mass Spectra Of Different Compounds Identified Inmentioning

confidence: 99%

Section: Effects Of Fenitrothion and Two Of Its Photoproducts On Stermentioning

confidence: 99%

See 2 more Smart Citations

Photodegradation kinetics of fenitrothion in various aqueous media and its effect on steroid hormones biosynthesis

et al. 2004

View full text Add to dashboard Cite

show abstract

“…The environmental behavior of both fenitrothion and its degradation product 3M4NP has been reported as a prevalent issue for organophosphorus pesticides and their transformation products (Baarschers et al, 1983;Misra et al, 1993;Lacorte and Barceló, 1994;Oubina et al, 1996;Castillo et al, 1997;Kanaly et al, 2005;Zayed et al, 2008) in Canada, Spain, India, and Egypt. Although fenitrothion has been used in many countries such as Japan, Canada, and Australia, the environmental situation of fenitrothion and 3M4NP in Japan has rarely been reported.…”

Section: Introductionmentioning

confidence: 99%

Detection of Fenitrothion and its Degradation Product 3-Methyl-4-nitrophenol in Water Environment

Kameya

Saito

Kondo

et al. 2012

J. of Wat. ^|^ Envir. Tech.

View full text Add to dashboard Cite

The organophosphate pesticide fenitrothion and its degradation product 3-methyl-4-nitrophenol (3M4NP), which possesses greater mutagen formation potential (MFP) than fenitrothion, were monitored. A total of 109 samples were collected from 41 sites of 12 rivers in the Tokyo metropolitan area and 71 samples were collected from 4 sites of 2 streams close to paddy fields in Kanagawa, Japan. The concentrations of fenitrothion and 3M4NP were determined by GC/MS with selected ion monitoring after solid-phase extraction and derivatization of 3M4NP with N, O-bis-(trimethylsilyl)trifluoroacetamide (BSTFA). Both fenitrothion and 3M4NP were below 1 µg/L (0 -0.083 µg/L of fenitrothion and 0 -0.156 µg/L of 3M4NP) in the river water samples, whereas fenitrothion and 3M4NP reached 0.16 and 1.6 µg/L, respectively, in the stream water samples. Seasonal and areal fluctuations were also observed in the streams. Nevertheless, the maximum concentration of 3M4NP appeared in late May at all sites. Furthermore, among the samples in which fenitrothion and/or 3M4NP were detected, 3M4NP largely contributed to the potential in 56% and 67% of the river and stream samples, respectively. These results strongly support the need for simultaneous monitoring of various pesticides and their degradation products, identification of degradation products and their MFP, and characterization of their behavior in water purification processes.

show abstract

Chromatography,HPLC

Cserh��ti¹,

Forg��cs²

2002

Encyclopedia of Agrochemicals

View full text Add to dashboard Cite

The newest achievements in the application of adsorption and reversed‐phase high‐performance liquid chromatography (HPLC) used for the separation and quantitative determination of various pesticides is discussed in detail. A short overview of the basic principles of the technique is given, and the main theoretical equations employed for the characterization of retention processes and the quality of separation are presented. Instrumentation and troubleshooting are outlined to the extent to give a working knowledge for the solution of practical separation problems for the analysts. The sample preparation strategies such as liquid–liquid, supercritical fluid, solid‐phase and solid‐phase microextraction suitable for the enrichment, and prepurification of pesticides in complicated matrices are surveyed. The techniques employed for the measurement of pesticides classes such as organochlorine, organophosphorous, carbamate, urea, triazine, phenoxyalkyl acid, and pyrethroid pesticides are compiled and critically evaluated. The newest and the most adequate methods are described in detail, whereas the previous HPLC procedures are shortly referred.

show abstract

Persistence of selected pesticides and their phenolic transformation products in natural waters using off-line liquid solid extraction followed by liquid chromatographic techniques

Cited by 104 publications

References 18 publications

Photodegradation kinetics of fenitrothion in various aqueous media and its effect on steroid hormones biosynthesis

Photodegradation kinetics of fenitrothion in various aqueous media and its effect on steroid hormones biosynthesis

Detection of Fenitrothion and its Degradation Product 3-Methyl-4-nitrophenol in Water Environment

Chromatography,HPLC

Contact Info

Product

Resources

About