Determination of diflubenzuron and chlorbenzuron in fruits by combining acetonitrile‐based extraction with dispersive liquid–liquid microextraction followed by high‐performance liquid chromatography

Ruan, Chunqiang; Zhao, Xiang; Liu, Chenglan

doi:10.1002/jssc.201401162

Cited by 21 publications

(4 citation statements)

References 36 publications

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“…In DLLME, an appropriate mixture of two solvents (extraction and dispersive solvents) is added into aqueous sample with a syringe, a cloudy solution containing fine droplets was formed and extraction equilibrium can be established rapidly [3,4]. This method has been widely Abbreviations: DLLME, dispersive liquid-liquid micro extraction; DLLME-SFO, dispersive liquid-liquid microextraction based on the solidification of a floating organic drop; PS, polystyrene; MSPE, magnetic solid-phase extraction; TFME, thin-film microextraction applied to the extraction of various compounds in different matrices [5,6].…”

Section: Introductionmentioning

confidence: 99%

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Electrospun polystyrene nanofibers as a novel adsorbent to transfer an organic phase from an aqueous phase

Liu

Song

Huang

et al. 2016

J of Separation Science

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The aim of this work is to develop a simple phase-transfer method for dispersive liquid-liquid microextraction. For this purpose, a polystyrene nanofiber was prepared by a facile electrospinning strategy and used for the first time as an adsorbent to transfer the organic phase in dispersive liquid-liquid microextraction procedure. The fiber was characterized and its chemical stability and excellent hydrophobicity enable it to selectively adsorb the organic solvent in an aqueous sample. High porosity and specific surface area provide a large adsorption capacity. Under the optimal conditions, the developed dispersive liquid-liquid microextraction with high-performance liquid chromatography method was successfully applied to the analysis of aldehydes in environmental water samples. The merits of this approach are that it is easy-to-operate, low-cost, time-saving, and has satisfactory sensitivity. It provides an alternative way for fast and convenient phase transfer of the hydrophobic organic solvent from the aqueous phase.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electrospun polystyrene nanofibers as a novel adsorbent to transfer an organic phase from an aqueous phase

Liu

Song

Huang

et al. 2016

J of Separation Science

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“…Floated organic drop microextraction (FDME) -high performance liquid chromatography (HPLC) has been developed for extraction and determination of benzoylurea insecticide residues from peach juice drink samples [29]. Diflubenzuron has been determined in fruits by the HPLC method after dispersive liquid-liquid microextraction of samples [30].…”

Section: Introductionmentioning

confidence: 99%

Development of a kinetic spectrophotometric method for insecticide diflubenzuron determination in water and baby food samples

Pecev‐Marinković

Grahovac

Pavlović

et al. 2018

Hem Ind

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A kinetic spectrophotometric method for determining residues of insecticide diflubenzuron 1(4-chlorphenyl)-3-(2,6-diflubenzoyl)urea (DFB) has been developed and validated. Kinetic method was based on the inhibitory effect of DFB on the oxidation reaction of sulfanilic acid (SA) by hydrogen peroxide in the presence of Co 2+ ions in a phosphate buffer, which was monitored at 370 nm. DFB can be measured in the concentration interval 0.102-3.40 μg mL-1 and 3.40-23.80 μg mL-1. The detection and quantification limits of the method were calculated according to the 3σ criteria and found to be 0.077 μg mL-1 and 0.254 μg Ml-1 , respectively. The relative standard deviations for five replicate determinations of 0.102, 1.70 and 3.40 μg mL-1 DFB were 2.08, 1.22 and 1.21 %, respectively, for the first concentration interval, and the recovery percentage values were from 94.12 to 97.35 %. HPLC method was used as a parallel method to verify results of the kinetic method. The kinetic method was successfully applied to determine diflubenzuron concentrations in spiked water and baby food samples after solid phase extraction of the samples. The F and t values at 95% confidence level are lower than the theoretical ones, confirming agreement of the developed and the HPLC method.

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“…They can be generally divided into two categories, nonenzymes and enzyme-based methods [1]. The former methods mainly rely on physical and chemical ways without biological components involved, such as gas chromatography [2][3][4][5][6], nitrogen-phosphorus detection [7,8], high-performance liquid chromatography [9][10][11], and capillary electrophoresis [12]. Normally, these methods heavily depend on fussy instruments and are more suitable for in-laboratory detection.…”

Section: Introductionmentioning

confidence: 99%

A Mobile-Based High Sensitivity On-Field Organophosphorus Compounds Detecting System for IoT-Based Food Safety Tracking

et al. 2017

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A mobile-based high sensitivity absorptiometer is presented to detect organophosphorus (OP) compounds for Internet-of-Things based food safety tracking. This instrument consists of a customized sensor front-end chip, LED-based light source, low power wireless link, and coin battery, along with a sample holder packaged in a recycled format. The sensor front-end integrates optical sensor, capacitive transimpedance amplifier, and a folded-reference pulse width modulator in a single chip fabricated in a 0.18 m 1-poly 5-metal CMOS process and has input optical power dynamic range of 71 dB, sensitivity of 3.6 nW/cm 2 (0.77 pA), and power consumption of 14.5 W. Enabled by this high sensitivity sensor front-end chip, the proposed absorptiometer has a small size of 96 cm 3 , with features including on-field detection and wireless communication with a mobile. OP compound detection experiments of the handheld system demonstrate a limit of detection (LOD) of 0.4 mol/L, comparable to that of a commercial spectrophotometer. Meanwhile, an android-based application (APP) is presented which makes the absorptiometer access to the Internet-of-Things (IoT).

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Determination of diflubenzuron and chlorbenzuron in fruits by combining acetonitrile‐based extraction with dispersive liquid–liquid microextraction followed by high‐performance liquid chromatography

Cited by 21 publications

References 36 publications

Electrospun polystyrene nanofibers as a novel adsorbent to transfer an organic phase from an aqueous phase

Electrospun polystyrene nanofibers as a novel adsorbent to transfer an organic phase from an aqueous phase

Development of a kinetic spectrophotometric method for insecticide diflubenzuron determination in water and baby food samples

A Mobile-Based High Sensitivity On-Field Organophosphorus Compounds Detecting System for IoT-Based Food Safety Tracking

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