Separation of atrazine and some of its degradation products by high-performance liquid chromatography

Vermeulen, Nicolaas M. J.; Apostolides, Zeno; Potgieter, D.J.J.; Nel, P. C.; Smit, N. S. H.

doi:10.1016/s0021-9673(01)84032-2

Cited by 77 publications

(35 citation statements)

References 11 publications

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“…-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%

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

Campanella

Vitaliano

2006

Annali di Chimica

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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.

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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

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“…At this pH, no net electrical charge was present on the surface, and the functional groups on the SDBCs surface were almost neutral. According to the pK a value (1.7 at 25°C, Vermeulen et al, 1982) of atrazine, the neutral form of atrazine was the sole species present at that pH range, and therefore sorption primarily occurs through H-bond, hydrophobic interactions, or van der Waals forces, rather than ionic interactions (Moreau- Kervevan and Mouvet, 1998;Clausen et al, 2001). In addition, a neutral solution can also decrease the atrazine desorption via deprotonating the functional groups on the SDBCs surface (Subha and Namasivayam, 2008;Wang and Tsang, 2013), thus increasing its net adsorption.…”

Section: Influence Of Ph and Ionic Strength In Watermentioning

confidence: 99%

Atrazine immobilization on sludge derived biochar and the interactive influence of coexisting Pb(II) or Cr(VI) ions

Zhang

Zheng

et al. 2015

Chemosphere

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“…Table 1 and [27][28][29][30][31][32][33][34][35][36][37][38][39][40]) precludes a separation in a single run with CZE, so MEKC is a promising alternative. Typical working reports for separation optimization in MEKC are devoted to either hydrophilic or hydrophobic compounds but not to a mixture of both.…”

Section: Resultsmentioning

confidence: 99%

Separation of 18 modern plant protectants using cyclodextrin modified micellar electrokinetic chromatography including an ion-pairing reagent

Stutz

Malissa

1998

Mikrochim Acta

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Abstract.A cyclodextrin-modified micellar electrokinetic chromatography separation for 18 different pesticides (metsuifuron-methyl, rimsulfuron, thifensulfuron-methyl, desethylatrazine, desisopropylatrazine, atrazine, simazine, terbuthylazine, 2,4-D, MCPR MCPB, dicamba, linuron, alachlor, metolachlor, orbencarb, propiconazole, prochloraz) from eight different substance classes with very varying chemical and physical properties is presented. In particular acidbase characteristics and water-octanol distribution coefficients diverge in wide ranges. 3-cyclodextrin was successfully employed as a modifier in separating the hydrophobic analytes. Peak distortion of some neutral analytes, which is devoted to the methanol content of the sample zone, was reduced by increasing the SDS concentration. Methanol in the sample is necessary for a better solubility of the hydrophobic pesticides. Few optima of SDS concentration exist allowing the separation of sulfonylureas as well as phenoxy acids and hydrophobic pesticides. An improved resolution of the sulfonylureas was achieved with tetramethylammonium chloride, which was used as an ion-pairing reagent.' Final operating conditions for the separation of all these plant protectant compounds by MEKC in just one single run are a 27mmolL -1 phosphate buffer, pH 8.03, with 95mmolL-1SDS, 5rmnolL =1 /3-cyclodextrin and 10 mmolL -1 tetramethylammonium-chloride.Key words: capillary electrophoresis, micellar electrokinetic chromatography, multi-residue-analysis, pesticide analysis. * To whom correspondence should be addressedThe relevance of high performance capillary electrophoresis (HPCE) applied in multi-residue methods for trace analysis of plant protectants in environmental samples has attained growing interest in the past few years. With a few exceptions authors restrict themselves to one class of pesticides, such as triazines [1-3], hydroxy-or methoxymetabolites of triazines, either alone or in combination with their parent compounds [4][5][6][7], phenoxy acids [8-11 ], phenylurea-[12], sutfonylurea-[13, 14J or dipyridylium-pesticides [15,16]. The application of capillary zone electrophoresis (CZE) dominates over micellar electrokinetic chromatography (MEKC). For neutral analytes or more complex pesticide mixtures MEKC is selected [17][18][19][20][21][22]. HPCE is more versatile than HPLC and GC since there is nearly no restriction to certain pesticide classes and therefore derivatization becomes unnecessary. Within the HPCE-techniques MEKC is more likely to separate complex substance mixtures than CZE, which is restricted to charged substances. This is due to various surfactants and modifiers that can be selected and combined in MEKC to optimize separation.In the field of multi-residue separation several successful attempts are published which show the general viability of MEKC technique. These approaches, however, were confined to mixtures of hydrophilic and moderately hydrophobic pesticides [18,21] including one hydrophobic pesticide at maximum [22]. If more than one hydrophobic ...

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Separation of atrazine and some of its degradation products by high-performance liquid chromatography

Cited by 77 publications

References 11 publications

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

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

Atrazine immobilization on sludge derived biochar and the interactive influence of coexisting Pb(II) or Cr(VI) ions

Separation of 18 modern plant protectants using cyclodextrin modified micellar electrokinetic chromatography including an ion-pairing reagent

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Separation of atrazine and some of its degradation products by high-performance liquid chromatography

Cited by 77 publications

References 11 publications

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

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

Atrazine immobilization on sludge derived biochar and the interactive influence of coexisting Pb(II) or Cr(VI) ions

Separation of 18 modern plant protectants using cyclodextrin modified micellar electrokinetic chromatography including an ion-pairing reagent

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

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