Fourier transform infrared determination of Fluometuron in pesticide formulations

Quintás, Guillermo; Morales-Noé, Asunción; Parrilla, Carmen; Garrigues, Salvador; Guárdia, Miguel de la

doi:10.1016/s0924-2031(02)00067-x

Cited by 15 publications

(5 citation statements)

References 9 publications

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“…for benzene ring stretching bands, and at 1336 cm -1 for the -CF 3 stretching vibration(Quintás et al, 2003). The most significant feature of the spectra of SSFs was the shifting of the band corresponding to the -CF 3 group of adsorbed fluometuron at 1333 cm -1 , towards…”

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confidence: 97%

Preparation and characterization of spermine-exchanged montmorillonite and interaction with the herbicide fluometuron

Gámiz

Celis

Hermosı́n

et al. 2012

Applied Clay Science

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We studied the interaction between the naturally occurring polycation spermine (SPERM) and Na-exchanged SWy-2 Wyoming montmorillonite (Na-SWy-2 Mt) and between spermineexchanged montmorillonite (Mt-SPERM) and the herbicide fluometuron. Mt-SPERM with spermine contents ranging between 0 and 1.2 times the cation exchange capacity (CEC) of Na-SWy-2 were studied by XRD, FTIR and TGA analysis. Spermine was intercalated stoichiometrically into Na-SWy-2 up to the CEC of the clay mineral, resulting in basal spacing of 1.3 nm. TGA analysis indicated that intercalation of spermine into Na-SWy-2 increased the thermal stability of the organic cations and affected the dehydroxylation temperature of the clay mineral. FTIR measurements of Mt-SPERM samples showed the involvement of N-H and C-H groups of spermine in the interaction with the clay mineral. The intensity of the spermine N-H and C-H deformation vibrations increased linearly with the amount of spermine incorporated into Na-SWy-2 up to an amount close to the CEC of the montmorillonite. Structural modeling suggested that the arrangement of spermine cations formed a horizontal monolayer within the interlayer space of SWy-2 with strong interaction between the-NH 3 + and-NH 2 +-groups of spermine and the montmorillonite surface oxygen atoms. Mt-SPERM showed pronounced affinity for the herbicide fluometuron.

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confidence: 97%

Preparation and characterization of spermine-exchanged montmorillonite and interaction with the herbicide fluometuron

Gámiz

Celis

Hermosı́n

et al. 2012

Applied Clay Science

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“…FTIR spectrometry has been employed for the quantification of different active principles in commercially available pesticide formulations, such as carbaryl (14), buprofezin (15), fluometuron (16), folpet and metalaxyl (17), and chlorpyriphos-ethyl (18), showing the high suitability of FTIR to carry out this kind of analysis. However, to our knowledge, there is no precedent on the determination of Diuron by using FTIR spectrometry.…”

Section: Introductionmentioning

confidence: 99%

FTIR Approaches for Diuron Determination in Commercial Pesticide Formulations

Armenta

Quintás

Morales

et al. 2005

J. Agric. Food Chem.

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Two strategies have been developed for Diuron determination by FTIR spectrometry, an off-line extraction and stopped-flow determination and a fully mechanized procedure, based on the on-line extraction of Diuron and FIA-FTIR measurement of the extracts. The aforementioned procedures have been compared with a reference chromatographic method. The off-line FTIR spectra were obtained at a nominal resolution of 4 cm(-1) from 4000 to 900 cm(-1) by accumulating 25 scans. Diuron was determined using peak height measurements at 1582 cm(-1) corrected using a baseline defined between 1562 and 1614 cm(-1). The waste generation of the off-line procedure was 3.4 mL chloroform for each sample, and the method provided a LOD of 40 microg g(-1), corresponding to 0.8% (w/w) Diuron in the original sample. The fully mechanized FIA method provided a LOD of 35 microg g(-1), which corresponds to 0.7% (w/w) in the solid sample and a maximum sampling frequency of the whole procedure of 30 h(-1), with a waste generation of 9.3 mL per sample, taking into account the volume of CHCl(3) required for sample dissolution and that need as a carrier. All those methods consume less organic solvent than a HPLC method, which involves the use of 39 mL of acetonitrile per sample and a sampling frequency of 12 h(-1).

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“…21,22 Fourier Transform Infrared spectrometry (FTIR) provides highly useful information about the structure of analites and it can be used for both qualitative and quantitative analysis. 23,24 Because of this we have developed a series of analytical methodologies for the FTIR determination of Fluometuron, 25 Buprofezin, 26 Folpet and Metalaxyl. 27 However there is no analytical procedure proposed in the literature for the determination of Imidacloprid in pesticide formulations by FTIR.…”

Section: Introductionmentioning

confidence: 99%

Fourier transform infrared determination of imidacloprid in pesticide formulations

Quintás¹,

Armenta²,

Garrigues³

et al. 2004

J. Braz. Chem. Soc.

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Fourier transform infrared determination of Fluometuron in pesticide formulations

Cited by 15 publications

References 9 publications

Preparation and characterization of spermine-exchanged montmorillonite and interaction with the herbicide fluometuron

Preparation and characterization of spermine-exchanged montmorillonite and interaction with the herbicide fluometuron

FTIR Approaches for Diuron Determination in Commercial Pesticide Formulations

Fourier transform infrared determination of imidacloprid in pesticide formulations

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