HPLC-UV and HPLC-MSn multiresidue determination of amidosulfuron, azimsulfuron, nicosulfuron, rimsulfuron, thifensulfuron methyl, tribenuron methyl and azoxystrobin in surface waters

Polati, S.; Bottaro, M; Frascarolo, P; Gosetti, Fabio; Gianotti, Valentina; Gennaro, Maria Carla

doi:10.1016/j.aca.2006.07.034

Cited by 113 publications

(58 citation statements)

References 13 publications

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“…The chromatographic conditions already optimized for the separation of a mixture of sulfonylurea herbicides were fitted to the separation of tribenuron methyl [29]. The stationary phase was a Lichrospher column RP-18 endcapped (5 m, 250 mm ϫ 4 mm i.d.)…”

Section: Hplc-dad-ms/ms Conditionsmentioning

confidence: 99%

Hydrolytic and photoinduced degradation of tribenuron methyl studied by HPLC-DAD-MS/MS

Bottaro

Frascarolo

Gosetti

et al. 2008

J. Am. Soc. Mass Spectrom.

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The©paper©studies,©with©the©help©of©HPLC-DAD-MS/MS©technique,©the©hydrolytic©and photoinduced©degradation©processes©that©take©place©in©aqueous©solutions©of©tribenuron methyl,© both© when© preserved© in© the© dark© and© when© undergoing© solar© box© irradiation© under conditions© that© simulate© sun© light.© The© results© indicate© that© the© degradation© products© formed by© hydrolysis© alone© and© by© photoirradiation© are© the© same,© but© kinetics© of© the© hydrolysis reaction©is©much©slower.©The©degradation©products©are©identified©as©2-methoxy-4-methylamino-6-methyl-1,3,5-triazine© (P1),© methyl© 2-aminosulfonylbenzoate© (P2),© and© saccharin© (P3)© and© quantified.© Ecotoxicological© biotests© performed© on© 0.1© g L Ϫ1 photoirradiated solutions of the herbicide give a border line toxicity situation comparable to that of the precursor and indicate that the herbicide is characterized by low persistence in the environment, as required. Its degradation, however, does not lead to mineralization but to the formation of products of comparable toxicity. To evaluate the matrix effects, the photodegradation of the herbicide is also studied in the presence of rice paddy waters: the process is slower than in ultrapure water but leads to the same products. Experiments performed for comparison by irradiating ultrapure water solutions with UV lamp (254 nm) show that the degradation process is not only faster with respect to sunlight, but gives a different pathway, without in anyway leading to mineralization. T he more recent herbicide formulations are designed to offer advantages of the highest selectivity together with the lowest persistence in the environment: sulfonylurea herbicides meet these requirements. But, unfortunately, lower persistence in the environment does not necessarily correspond to lower toxicity, since many herbicides undergo natural degradation reactions in the environment that do not lead to mineralization but to the formation of new species potentially more toxic and stable than the precursors [1][2][3][4][5]. The evaluation of the degradation pathway and the structures and toxicity of the degradation products is therefore of paramount importance.The natural degradation of sulfonylurea herbicides takes place through aqueous hydrolysis reactions [6 -8], microbial processes (mainly occurring in soils) [9 -11], or photodegradation reactions [1-3, 5, 12-14]. These processes in surface waters and in soil are concomitant [7,15,16].HPLC-DAD-MS/MS methods are employed here to investigate and compare the hydrolytic and photoinduced degradation pathways of aqueous solutions of tribenuron methyl (methyl [2-4-methoxy-6-methyl-1,3,5-triazin-2-yl(methyl)carbamoyl sulfamoyl]benzoate) (Scheme 1), largely used against broad-leaved weeds in crops of cereals and in particular of rice.TiO 2 assisted photodegradation often leads to complete mineralization and can be used to dissipate pollutants in remediation strategy [17][18][19][20]. We are interested here to study the natural photodegradation of tribenuron methyl in...

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Section: Hplc-dad-ms/ms Conditionsmentioning

confidence: 99%

Hydrolytic and photoinduced degradation of tribenuron methyl studied by HPLC-DAD-MS/MS

Bottaro

Frascarolo

Gosetti

et al. 2008

J. Am. Soc. Mass Spectrom.

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show abstract

“…The methodology consisted on a pre concentration/SPE step using a Strata RP-18 E and two polymeric phases, Strata-X and Lichrolut EN, followed by HPLC-UV (240nm)-MS n analysis. After a 1000/1 pre-concentration the LODs were lower than 26.9ngL -1 with recoveries around 81-113% and RSD in the range 10-22 % (Polati et al, 2006). Kuster et al, in 2007, described the analysis of 14 polar herbicides in the Ebro river delta, during the main growing season of rice, by an automated on-line solid phase extraction followed by liquid chromatography tandem mass spectrometry.…”

Section: Herbicide Residue Analysis In Watermentioning

confidence: 99%

Critical Revision and Development Perspectives of Herbicide Residues Analysis in Agro Ecosystems

Cesio¹,

Niell²,

Pareja³

et al. 2011

Herbicides and Environment

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“…al., 2005;D'Archivio et. al., 2007, Polati et al, 2006Mazzella et al, 2008;Yu et al, 2009). Most of the studies investigate the performance of Oasis HLB in off-line SPE using different cartridge size available (from 30 to 500 mg).…”

Section: Hydrophilic Polymeric Sorbentsmentioning

confidence: 99%

Solid-Phase Extraction for Enrichment and Separation of Herbicides

Pyrzyńska¹

2011

Herbicides, Theory and Applications

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HPLC-UV and HPLC-MSn multiresidue determination of amidosulfuron, azimsulfuron, nicosulfuron, rimsulfuron, thifensulfuron methyl, tribenuron methyl and azoxystrobin in surface waters

Cited by 113 publications

References 13 publications

Hydrolytic and photoinduced degradation of tribenuron methyl studied by HPLC-DAD-MS/MS

Hydrolytic and photoinduced degradation of tribenuron methyl studied by HPLC-DAD-MS/MS

Critical Revision and Development Perspectives of Herbicide Residues Analysis in Agro Ecosystems

Solid-Phase Extraction for Enrichment and Separation of Herbicides

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