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Townsend, Margaret; Young, D. P.

doi:10.1023/a:1010143426576

Cited by 21 publications

(6 citation statements)

References 9 publications

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“…The occurrence of desethylatrazine cannot be attributed to former usage of atrazine with absolute certainty, since this compound is also a metabolite of the formerly used herbicide propazine [54]. However, depending on local herbicide patterns, a desethylatrazine/atrazine-ratio (DAR) > 1 can indicate a breakdown of atrazine in soil and groundwater [50]. In the presented case, the DAR is ∼3.…”

Section: Application To Environmental Samplesmentioning

confidence: 80%

“…Micro-contaminants are suggested to be source specific and thus offer the potential to be employed as indicators for source delineation in monitoring ground and surface water quality, its decline or improvement. This especially applies to selected pharmaceuticals, pesticides and stimulants [50][51][52]. Since caffeine is generally readily biodegradable in WWTPs, it has been used as an indicator for the input of raw sewage into surface waters [52].…”

Section: Application To Environmental Samplesmentioning

confidence: 99%

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Development of a multi-residue analytical method, based on liquid chromatography–tandem mass spectrometry, for the simultaneous determination of 46 micro-contaminants in aqueous samples

Nödler

Licha

Bester

et al. 2010

Journal of Chromatography A

187

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Section: Application To Environmental Samplesmentioning

confidence: 80%

Section: Application To Environmental Samplesmentioning

confidence: 99%

Development of a multi-residue analytical method, based on liquid chromatography–tandem mass spectrometry, for the simultaneous determination of 46 micro-contaminants in aqueous samples

Nödler

Licha

Bester

et al. 2010

Journal of Chromatography A

187

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“…Because of the large use of atrazine (AT) to control annual grasses and broad-leaved weeds in several crops, in roadside verges and golf courses, intense research has been performed to investigate its environmental impacts. [2][3][4][5][6] Several authors have reported the presence of AT and its metabolites in surface and ground waters, as well as other s-triazines such as simazine, ametryne and propazine. 7 Although the presence of AT metabolites is indicative of herbicide degradation, some of them, especially deethylatrazine (DEA) and deisopropylatrazine (DIA), have similar toxicity, greater water solubility and weaker interaction with soil components than the parent herbicide.…”

Section: Introductionmentioning

confidence: 99%

Sorption of atrazine, propazine, deethylatrazine, deisopropylatrazine and hydroxyatrazine onto organovermiculite

Abate

Masini

2005

J. Braz. Chem. Soc.

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hexadeciltrimetil-amônio (HDTMA-VT) no espaço interlamelar. A VTK bruta teve interação desprezível com AT, PROP e DEA, interação moderada com DIA e forte interação com HAT. No caso do material HDTMA-VT as porcentagens de remoção em meio aquoso (concentrações iniciais entre 0,05 a 1,00 mg L -1 ) foram: 56 -63% para AT, 43 -45% para DEA, 30 -24% para DIA, 12 -19% para HAT e 77 -78% para PROP. As taxas de sorção de AT, DEA e PROP em HDTMA-VT foram significativamente aumentadas com relação a VTK. Força iônica e pH tiveram pouca influência na sorção. A dessorção dos compostos previamente sorvidos sobre os minerais HDTMA-VT variou de 20 a 30% após um tempo de contacto de 24 h.The interaction of atrazine (AT), propazine (PROP), deethylatrazine (DEA), deisopropylatrazine (DIA) and hydroxyatrazine (HAT) was studied with the clay mineral vermiculite saturated with K + (VTK), and with the mineral modified by insertion of hexadecyltrimethyl-ammonium (HDTMA-VT) in the interlayer of VTK. The crude VTK exhibited negligible interaction with AT, PROP and DEA, moderate interaction with DIA and strong interaction with HAT. For the HDTMA-VT materials, removal percentages from aqueous medium for initial concentrations between 0.05 and 1.00 mg L -1 were 56 to 63% for AT, 43 to 45% for DEA, 12 to 19% for HAT and 77 to 78% for PROP. Sorption of AT, DEA and PROP onto HDTMA-VT was significantly enhanced in comparison to VTK. Ionic strength and pH had no significant influence on the sorption process. Desorption of all compounds from HDTMA-VT after 24 h of contact time was between 20 and 30% of the amount initially adsorbed.

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“…Biotic or abiotic effects may cause the degradation of s-triazines providing the generation of dealkylated, hydroxylated, and deaminated compounds [3], which have toxicities that are similar or even stronger than those of the parent compounds [4,5]. The large use of atrazine, propazine, and simazine, and the similarity of their physicochemical properties such as water solubility, high polarity, low degree of adsorption in soils, and high persistence are the cause of the frequent occurrences of these chemicals and their metabolites in groundwaters [3,[6][7][8]. The chemical structures of these three herbicides are given in Fig.…”

Section: Introductionmentioning

confidence: 99%

Development of a sequential injection chromatography (SIC) method for determination of simazine, atrazine, and propazine

Santos

Infante

Masini

2009

J of Separation Science

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This paper describes the development of a sequential injection chromatography (SIC) procedure for separation and quantification of the herbicides simazine, atrazine, and propazine exploring the low backpressure of a 2.5 cm long monolithic C(18) column. The separation of the three compounds was achieved in less than 90 s with resolution >1.5 using a mobile phase composed by ACN/1.25 mmol/L acetate buffer (pH 4.5) at the volumetric ratio of 35:65 and flow rate of 40 microL/s. Detection was made at 223 nm using a flow cell with 40 mm of optical path length. The LOD was 10 microg/L for the three triazines and the quantification limits were of 30 microg/L for simazine and propazine and 40 microg/L for atrazine. The sampling frequency is 27 samples per hour, consuming 1.1 mL of ACN per analysis. The proposed methodology was applied to spiked water samples and no statistically significant differences were observed in comparison to a conventional HPLC-UV method. The major metabolites of atrazine and other herbicides did not interfere in the analysis, being eluted from the column either together with the unretained peak, or at retention times well-resolved from the studied compounds.

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Untitled

Cited by 21 publications

References 9 publications

Development of a multi-residue analytical method, based on liquid chromatography–tandem mass spectrometry, for the simultaneous determination of 46 micro-contaminants in aqueous samples

Development of a multi-residue analytical method, based on liquid chromatography–tandem mass spectrometry, for the simultaneous determination of 46 micro-contaminants in aqueous samples

Sorption of atrazine, propazine, deethylatrazine, deisopropylatrazine and hydroxyatrazine onto organovermiculite

Development of a sequential injection chromatography (SIC) method for determination of simazine, atrazine, and propazine

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