Fenvalerate (Update)

Papadopoulou‐Mourkidou, Euphemia

doi:10.1016/b978-0-12-784316-2.50006-4

Cited by 4 publications

(5 citation statements)

References 1 publication

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“…Chromatograms * X * 200 nm When the column temperature is increased the solute retention times are decreased (5). With any column temperature increase, however, 2-propanol, the polar modifier of the mobile phase, is also less retained, the column equilibrium is disturbed and an "excess" of 2-propanol, previously bound on the column stationary phase, enriches the mobile phase thus the mobile phase polarity and its UV absorption are temporarily increased.…”

Section: Resultsmentioning

confidence: 99%

“…Sample chromatograms from the analysis of fenvalerate on column B thermostated at 15 °C and eluted with a mobile phase consisting of 0.1% 2-propanol in hexane, flow 1 mL/min. Chromatograms A and C are sample chromatograms from the analysis of5 Hg of fenvalerate dissolved in 20 ixL of 2-propanol while the chromatograms B and D are sample chromatograms from the analysis of 20 ixL of 2-propanol.…”

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confidence: 99%

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Temperature-dependent solute retention time variations, base-line drifts, and solute peak splits during the analysis of fenvalerate by a high-performance liquid chromatographic/diode array system

Papadopoulou‐Mourkidou¹

1989

Anal. Chem.

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The optical isomers of fenvalerate, (RS)-alpha-cyano(3-phenoxyphenyl)methyl (RS)-2-(4-chlorophenyl)-3-methylbutyrate, were analyzed by high-performance liquid chromatography (HPLC) on chiral columns eluted with mixtures of 2-propanol in hexane. The HPLC eluates were monitored by a photodiode-array ultraviolet absorbance detector. When the HPLC columns were maintained at ambient temperature, chromatograms with drifting base lines of four to eight peaks, instead of four, and isograms, three-dimensional chromatograms, with "negative" peak artifacts coeluted with fenvalerate isomers were usually obtained during a continuous run of the HPLC system for many days and by injecting onto the system only fenvalerate analytical standard solutions. Chromatograms and isograms without artifacts and straight base lines were obtained only when the HPLC column was thermostated and well equilibrated for at least 8-10 h.

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Temperature-dependent solute retention time variations, base-line drifts, and solute peak splits during the analysis of fenvalerate by a high-performance liquid chromatographic/diode array system

Papadopoulou‐Mourkidou¹

1989

Anal. Chem.

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“…Moreover, MBC is also the principal metabolite of two other systemic benzimidazole fungicides, benomyl [methyl 1-(butylcarbamoyl)benzimidazol-2-ylcarbamate] and thiophanate-methyl [dimethyl 4,4'-(ophenylene)bis(3-thioallophanate)]. Therefore, their total residues are usually determined in the form of MBC and a single maximum residue limit (MRL) of 5 ppm has been recommended for this group of fungicides [1]. Thiabendazole [2-(thiazol-4-yl)benzimidazole] (TBZ) is another member of the benzimidazole systemic fungicides extensively used since 1968.…”

Section: Introductionmentioning

confidence: 99%

Analysis of carbendazim and thiabendazole in lemons by CE-DAD

et al. 2003

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SummaryA capillary electrophoretic method for the determination of l",,vo benzimiclazoJe fungicides, carbenclazim and thiabenclazole, in lemons has been developed. The l",,vo fungicides were separated in a Iow-pH phosphate buffer containing acetonitrile. Reproducibility tests measuring both migration times and peak areas gave low relative standard-deviation values. Calibration graphs were linear and the detection limits, defined as a signal-to-noise ratio of 3:1, were 2.3 and 2.0 ~g mL 1 for thiabendazole and carbendazim, respectively. Analysis of carbendazim and thiabendazole residues in lemons was performed after lemon homogenization, extraction with ethyl acetate and purification through a series of separatory-funnel, acid-base partitions. This lemon clean-up procedure ensured no interference in the capillary electrophoretic analysis from lemon endogenous ingredients.

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“…It has also been used to protect the color and flavor of dried fruits, such as apricot, apples, plums etc. [6][7][8] Furthermore, sulfur compounds are also exploited in different fields, such as fertilizer, alloying agent, disintegration agent and car batteries. 9 There are some limitations for the sulfur amount consumed in different application areas.…”

Section: Introductionmentioning

confidence: 99%

Determination of Sulfur in Grape and Apricot Samples Using High-resolution Continuum Source Electrothermal Molecular Absorption Spectrometry

2018

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The determination of sulfur in apricot and grape samples was performed by using high-resolution continuum source electrothermal molecular absorption spectrometry based on vaporization of the carbon monosulfide (CS) molecule. CS forms in the gas phase without the addition of any molecule-forming element, since graphite cuvette contains plenty of carbon as well as food samples. A mixture of 15 μg Pd + 10 μg Mg was used in solution as the chemical modifier. The best sensitivity was obtained at 900°C of the pyrolysis temperature with a KSO calibration solution. The calibration plot drew a linear path between 50 and 1600 ng of sulfur, and the limit of detection was found to be 23 ng. The accuracy of the method was confirmed with the use of a standard reference material (Rice Flour, NIST SRM 1568a). The sulfur content in chemically dried apricot samples (1987 ± 45 mg/kg) was determined to be higher than that of apricot samples dried under sunshine.

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Fenvalerate (Update)

Cited by 4 publications

References 1 publication

Temperature-dependent solute retention time variations, base-line drifts, and solute peak splits during the analysis of fenvalerate by a high-performance liquid chromatographic/diode array system

Temperature-dependent solute retention time variations, base-line drifts, and solute peak splits during the analysis of fenvalerate by a high-performance liquid chromatographic/diode array system

Analysis of carbendazim and thiabendazole in lemons by CE-DAD

Determination of Sulfur in Grape and Apricot Samples Using High-resolution Continuum Source Electrothermal Molecular Absorption Spectrometry

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