Determination of chlorotriazines and their photolysis products by liquid chromatography with photodiode-array and thermospray mass spectrometric detection

Durand, G.; Barceló, Damià

doi:10.1016/s0021-9673(01)89592-3

Cited by 84 publications

(31 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Samples were filtered with GF/F filters and processed by solid extraction applying C‐18 cartridges (Accubond SPE, 6 ml, 500 mg, J&W Scientific Fisons, Folsom, CA, USA). High‐performance liquid chromatographic analysis was performed according to the method of Durand and Barcelo [29] and Guasch et al [30].…”

Section: Methodsmentioning

confidence: 99%

Evaluation of the capacity for development of atrazine tolerance in periphyton from a swedish freshwater site as determined by inhibition of photosynthesis and sulfolipid synthesis

Nyström

Paulsson

Almgren

et al. 2000

Enviro Toxic and Chemistry

View full text Add to dashboard Cite

Abstract-Periphyton communities were established on glass disks under continuous exposure to atrazine (0.056-3.2 M, or 12-700 g/L) in a microcosm flowthrough system with water from the Göta Ä lv river in Southern Sweden. The effects of atrazine on chlorophyll a content, ash-free dry weight, algal species composition, and adenine and thymidine incorporation activity were determined after 4 weeks of continuous exposure. Tolerance of the algal community to atrazine was also determined by short-term inhibition of photosynthesis and sulfolipid synthesis. The no-effect concentrations for the long-term exposure as determined with the different methods were between 0.040 and 0.28 M of atrazine. The algal community seemed to have a low potential for development of tolerance to atrazine. Tolerant algae, however, seemed to have some capacity to replace the more sensitive species at low long-term exposure (0.056-0.56 M), which was reflected in a small but consistent increase of community tolerance. At higher concentrations, no algal species remained unaffected by atrazine, and consequently, no further increase in community tolerance was possible. On the contrary, the algal community appeared to become more sensitive.

show abstract

Section: Methodsmentioning

confidence: 99%

Evaluation of the capacity for development of atrazine tolerance in periphyton from a swedish freshwater site as determined by inhibition of photosynthesis and sulfolipid synthesis

Nyström

Paulsson

Almgren

et al. 2000

Enviro Toxic and Chemistry

View full text Add to dashboard Cite

show abstract

“…-Atrazine photodegradation product, cyanuric acid, 27 and even several intermediate species that have been identified 29-32 absorb markedly at 222 nm, [33][34][35] interfering with the Atrazine signal. It is so convenient to monitor atrazine reactions at 263nm for the following motivations.…”

Section: Absorbancementioning

confidence: 98%

“…They convert rapidly into hydroxilic intermediates, 32 that don't absorb at 263 nm. [33][34][35] So 263 nm wavelength is suitable to detect atrazine concentration without intermediates' interference. In fig.5 an experimental decreasing of absorbance signal recorded at 263 nm versus time is reported.…”

Section: Absorbancementioning

confidence: 99%

Atrazine Toxicity Reduction Following H₂O₂/TiO₂‐Photocatalyzed Reaction and Comparison with H₂O₂‐Photolytic Reaction

Campanella

Vitaliano

2006

Annali di Chimica

View full text Add to dashboard Cite

Summary -An atrazine photodegradation study carried out by a Q-Panel suntest apparatus is reported in this work. H 2 O 2 /TiO 2 photocatalyzed reaction yield and parameters (time, irradiance, temperature, H 2 O 2 (40%) volume, TiO 2 amount) were exactly determined relating to the used atrazine concentration. An experimental kinetic study was performed to establish the reaction order in fixed conditions. Using a biosensor method, 10 -4 M Atrazine solution toxicity and final photocatalytic reaction solution toxicity were quantitatively determined. A consistent toxicity decrease was observed on passing from the analyte to the products of the photocatalytic reaction. An analogous photolytic reaction carried out in absence of TiO 2 , but in the same experimental conditions of time, irradiance, temperature and H 2 O 2 volume, brings to a toxicity increase.

show abstract

“…Experiments using a xenon lamp emitting radiation between 300 and 800 nm (similar to natural solar radiation) to irradiate atrazine in distilled waters showed that atrazine was degraded to hydroxyatrazine (half-life c1 h) which persisted. 28 Given that there is only a small spectral overlap between the UV/VIS-absorption spectrum of simazine and atrazine (l max = 221 nm) 21 and sunlight (300± 800 nm), observed photolysis may be a consequence of poor shielding of radiation below 290 nm under arti®cial light conditions. The observed photolysis in buffer solutions exposed to natural sunlight as part of this work, however, indicates that although sub-300-nm radiation only makes up a small percentage of the solar spectrum, it is of suf®cient intensity to promote photolysis of the triazines.…”

mentioning

confidence: 99%

Abiotic persistence of atrazine and simazine in water

Comber

1999

Pestic. Sci.

View full text Add to dashboard Cite

Hydrolysis and photolysis experiments have been undertaken to investigate the abiotic persistence of atrazine and simazine in a variety of waters. Hydrolysis only occurs to a signi®cant extent at pH values at the lower limit of those found in the natural aquatic environment (pH 4.0 or less). Photolysis was initiated by a wide range of wavelengths in waters at pH 4.0, but only by more energetic wavelengths of less than 300 nm at higher pH values (pH 6 to 8). Based on these data, the aquatic halflife of atrazine and simazine in well-lit acidic upland waters will be typically six days. In lowland rivers with higher pH (7 to 8.5), these triazines are likely to exhibit half-lives of months rather than days. In groundwaters, atrazine and simazine will have half-lives in the order of years, due to the exceedingly slow rate of hydrolysis.

show abstract

Determination of chlorotriazines and their photolysis products by liquid chromatography with photodiode-array and thermospray mass spectrometric detection

Cited by 84 publications

References 20 publications

Evaluation of the capacity for development of atrazine tolerance in periphyton from a swedish freshwater site as determined by inhibition of photosynthesis and sulfolipid synthesis

Evaluation of the capacity for development of atrazine tolerance in periphyton from a swedish freshwater site as determined by inhibition of photosynthesis and sulfolipid synthesis

Atrazine Toxicity Reduction Following H₂O₂/TiO₂‐Photocatalyzed Reaction and Comparison with H₂O₂‐Photolytic Reaction

Abiotic persistence of atrazine and simazine in water

Contact Info

Product

Resources

About

Determination of chlorotriazines and their photolysis products by liquid chromatography with photodiode-array and thermospray mass spectrometric detection

Cited by 84 publications

References 20 publications

Evaluation of the capacity for development of atrazine tolerance in periphyton from a swedish freshwater site as determined by inhibition of photosynthesis and sulfolipid synthesis

Evaluation of the capacity for development of atrazine tolerance in periphyton from a swedish freshwater site as determined by inhibition of photosynthesis and sulfolipid synthesis

Atrazine Toxicity Reduction Following H2O2/TiO2‐Photocatalyzed Reaction and Comparison with H2O2‐Photolytic Reaction

Abiotic persistence of atrazine and simazine in water

Contact Info

Product

Resources

About

Atrazine Toxicity Reduction Following H₂O₂/TiO₂‐Photocatalyzed Reaction and Comparison with H₂O₂‐Photolytic Reaction