Determination of diflubenzuron and its main metabolites in forestry matrices by liquid chromatography with on-line diode-array and electrochemical detection

Rodríguez, Esther; Barrio, Ramón J.; Goicolea, A.; Balugera, Zuriñe Gómez de

doi:10.1016/s0003-2670(98)00805-8

Cited by 23 publications

(12 citation statements)

References 17 publications

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“…Among them, HPLC is the analytical method of choice. DFB has been analysed in reverse phase chromatographic systems with spectrophotometric,12–14 mass spectrometric,15–17 amperometric18 or fluorimetric19 detection. Here the HPLC method was optimised to separate the DFB peak from other components present in the horse chestnut leaf extracts.…”

Section: Resultsmentioning

confidence: 99%

Residues of diflubenzuron on horse chestnut (Aesculus hippocastanum) leaves and their efficacy against the horse chestnut leafminer, Cameraria ohridella

Nejmanová

Cvačka

Kuldová

et al. 2006

Pest Management Science

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Residues of the insect growth regulator diflubenzuron were quantified on horse chestnut (Aesculus hippocastanum L.) leaves treated with a diflubenzuron 480 g litre(-1) SC, Dimilin. To analyse the samples, an analytical procedure was developed involving a simple extraction step followed by high-performance liquid chromatography on an octadecyl-modified silica column with methanol + 0.01 M ammonium acetate mobile phase. The results showed diflubenzuron to be highly stable on horse chestnut leaves; more than 4 months (127 days) after application, 38% (on average) of the insecticide still remained on/in the leaves. The data confirmed biological observations showing diflubenzuron's long-term efficacy against the horse chestnut leafminer, Cameraria ohridella Deschka and Dimić, which is the most important pest of the horse chestnut in Europe. The hypothesis of possible penetration of diflubenzuron into the leaf mass is explored and discussed.

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Section: Resultsmentioning

confidence: 99%

Residues of diflubenzuron on horse chestnut (Aesculus hippocastanum) leaves and their efficacy against the horse chestnut leafminer, Cameraria ohridella

Nejmanová

Cvačka

Kuldová

et al. 2006

Pest Management Science

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“…During the past few decades, modern sample preparation methods such as solid-phase extraction (SPE) [1,2], solidphase microextraction (SPME) [3,4], matrix solid-phase dispersion (MSPD) [5,6], membrane-assisted solvent extraction (MASE) [7,8], microporous polypropylene hollow fiber (HF) membranes [9,10] and stir-bar sorptive extraction (SBSE) [11,12] have been developed and improved to overcome drawbacks of the classical liquidliquid extraction methods. SPME is a powerful, simple, fast and solvent-free extraction method, which solves a number of problems confronting the analyst during sampling and introducing the sample into analytical instruments [13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Inside-Needle Extraction Method Based on Molecularly Imprinted Polymer for Solid-Phase Dynamic Extraction and Preconcentration of Triazine Herbicides Followed by GC–FID Determination

et al. 2012

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An inside-needle extraction method was developed through thermal polymerization of atrazinemolecularly imprinted polymer (MIP) on the internal surface of a stainless steel hollow needle, which was oxidized and silylated. The fabricated coating (MIP layer) for the needle was durable and showed very good chemical and thermal stability. It could be mounted on a glass syringe and be directly coupled with gas chromatographic (GC) systems. The parameters being effective on the coating and extraction processes, namely nature of oxidizing agent, silylation time, nature and amount of porogen, template-to-MIP components ratio, polymerization time and temperature, sample volume, flow rate, pH and ionic strength of the sample were investigated and optimized. The extraction needle showed high selectivity as well as a great extraction capacity for triazines. The extraction of atrazine, simazine, cyanazine, ametryn, prometryn and terbutryn using the fabricated extraction needle and followed by GC analysis resulted in detection limits of 2.6, 21, 24, 32, 38 and 42 ng mL -1 , respectively. The fabricated needle proved to be applicable to the analysis of real samples by comparing the results obtained for non-spiked and spiked samples of grape juice, tap water and groundwater.

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“…Literature results showed that some of these DFB photoproducts were metabolites, and were found in plants, animals, especially fish, and in the marine environment . For example, 4‐chloroaniline‐2‐sulfate and N ‐(4‐chlorophenyl)oxamic acid were detected in rat urine, whereas PCPU, DFBA and DFBAc were generally found in groundwater, surface water, soils, and sediments…”

Section: Resultsmentioning

confidence: 99%

Combination of photoinduced fluorescence and GC–MS for elucidating the photodegradation mechanisms of diflubenzuron and fenuron pesticides

et al. 2019

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Diflubenzuron (DFB) and fenuron (FEN) are benzoylurea and phenylurea pesticides, widely used in Senegal, that do not exhibit any natural fluorescence, but can be determined by means of photoinduced fluorescence (PIF) methods. Photodegradation of DFB and FEN yielded a number of fluorescent and non-fluorescent photoproducts. For both pesticides, at least 10 photoproducts were detected and identified by gas chromatography-mass spectrometry (GC/MS). To identify the formed fluorescent DFB and FEN photoproducts, their fluorescence spectra were compared with those of standard compounds, including phenol and p-hydroxyaniline. KEYWORDS diflubenzuron and fenuron pesticides, fluorescent photoproducts, gas chromatography-mass spectrometry (GC-MS), photoinduced fluorescence (PIF)

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Determination of diflubenzuron and its main metabolites in forestry matrices by liquid chromatography with on-line diode-array and electrochemical detection

Cited by 23 publications

References 17 publications

Residues of diflubenzuron on horse chestnut (Aesculus hippocastanum) leaves and their efficacy against the horse chestnut leafminer, Cameraria ohridella

Residues of diflubenzuron on horse chestnut (Aesculus hippocastanum) leaves and their efficacy against the horse chestnut leafminer, Cameraria ohridella

Inside-Needle Extraction Method Based on Molecularly Imprinted Polymer for Solid-Phase Dynamic Extraction and Preconcentration of Triazine Herbicides Followed by GC–FID Determination

Combination of photoinduced fluorescence and GC–MS for elucidating the photodegradation mechanisms of diflubenzuron and fenuron pesticides

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