Quantification of Phenylurea Pesticides by HPLC/ECD and Photolysis

Goger, Birgit; Kunert, Olaf; Seger, Christoph; Rinelli, Rebecca; Wintersteiger, Reinhold

doi:10.1002/1521-4109(200111)13:16<1335::aid-elan1335>3.3.co;2-n

Cited by 3 publications

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“…This easy to use and configure platform demonstrates the advantages of a flow system, such as the increase in the rate of mass transport that affects both the electrochemical and spectroscopic response, can be applied to various types of measurements, ranging from fundamental mechanistic studies to analytical measurements. Furthermore, by constructing a hyphenated system, for example, using Units ABC 1 and ABC 3 , a dual activation process followed by a UV–vis measurement could be envisioned, to sustain combined herbicide and pesticide studies. − Long-term use of this platform also could involve HPLC detection, taking advantage of the built in mass transport assembly and the linear flow pattern, which are already within the required HPLC flow rates (0.2–1 mL min –1 ) . Furthermore, the ability to also perform ECL (Unit ABC 2 ) can increase the overall sensitivity of analytical detection. , Finally, the ability to carry out ECL opens several future avenues for the detection of biomolecules and advantages over conventional fluorescence methods include enhanced S/N, increased sensitivity, reduced self-quenching, and simplified equipment. , …”

Section: Discussionmentioning

confidence: 99%

Modular Flow-Through Platform for Spectroelectrochemical Analysis

et al. 2017

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A new type of flow platform for electrochemical and spectroelectrochemical measurements is presented. Finite element method simulations confirm that the hydrodynamic profile within the device is not turbulent and provides an analytical platform for the investigation of homogeneous kinetics, radical lifetimes, and reaction mechanisms. The modular "plug and play" configuration of the platform allows one to carry out electrochemistry and spectroscopy individually or simultaneously. Specific demonstrations of electroanalytical measurements using the flow system platform includes voltammetric analysis of organometallic compounds and quantitative analysis of ascorbic acid in commercial orange juice samples. Combined spectroelectrochemical demonstrations include electrochemical luminescence of ruthenium compounds and ligand exchange reactions of iron complexes using UV-vis spectroscopy.

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Section: Discussionmentioning

confidence: 99%

Modular Flow-Through Platform for Spectroelectrochemical Analysis

et al. 2017

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“…Owing to their high toxicity [4] and possible carcinogenicity, the determination of phenylurea herbicides at low concentrations in agricultural samples is of prime importance.…”

Section: Introductionmentioning

confidence: 99%

“…Phenylurea herbicide concentrations have been determined using gas chromatography (GC) [1,[9][10][11], HPLC for plant material [12,13], soil [14,15], and water samples [16,17] and electrochemical detection for groundwater samples [4]. However, determination of phenylurea herbicide concentrations by GC is difficult owing to thermal decomposition [3], so various derivatization techniques have been used to solve this problem [11].…”

Section: Introductionmentioning

confidence: 99%