Rapid and sensitive determination of biphenyl and biphenyl oxide in water samples using dispersive liquid–liquid microextraction followed by gas chromatography

Mashayekhi, Hossein Ali; Abroomand-Azar, Parviz; Saber-Tehrani, Mohammad; Waqif-Husain, Syed

doi:10.1080/03067310903525167

Cited by 24 publications

(11 citation statements)

References 9 publications

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“…According to the other papers, [12][13][14][15][16][17][18][19][20][21][22][23] time has no influence on extraction efficiency, because of that after formation of cloudy solution, the surface area between extraction solvent and aqueous phase (sample) is infinitely large. Thereby, transition of analytes from aqueous phase (sample) to extraction solvent is fast.…”

Section: Effect Of Extraction Timementioning

confidence: 99%

“…Up to now, DLLME has been successfully applied for extraction of organic and inorganic analytes. [12][13][14][15][16][17][18][19][20][21][22][23] In the present study, the applicability of the DLLME method combined with HPLC-UV for the determination of abamectin in fruit juice samples was investigated. The effects of various experimental parameters such as types and volumes of extraction and disperser solvents and salt addition on the extraction efficiency were studied.…”

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confidence: 99%

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Determination of Abamectin by Dispersive Liquid-liquid Microextraction Combined with High-Performance Liquid Chromatography in Fruit Juice Samples

Pashazanousi¹,

Mashayekhi²,

Rezaee³

2012

Orientjchem.

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Dispersive liquid-liquid microextraction (DLLME) coupled with high-performance liquid chromatography (HPLC) -UV detection was applied for the extraction and determination of abamectin (avermectin (B 1b ) and avermectin (B 1a )) in fruit juice samples. An appropriate mixture of ethanol (as the disperser solvent) and carbon tetrachloride (as the extraction solvent) was injected rapidly into a sample containing abamectin. After extraction, phase separation was performed by centrifuging the mixture and the sedimented phase was analyzed by HPLC-UV. Some effective parameters on the extraction, such as types and volumes of extractant and disperser solvents and salt effect were investigated and optimized. Under the optimum conditions, (extractant solvent: carbon tetrachloride, 30.0 µL; disperser solvent: ethanol, 1.0 mL and without salt addition), the calibration graphs were linear in the range of 2.5 -500 µg L -1 and 1.0 -500 µg L -1 with the detection limits of 0.8 µg L -1 and 0.3 µg L -1 for B 1b and B 1a in fruit juice samples, respectively. The relative standard deviation (R.S.D., n = 5) for the extraction and determination of 50.0 µg L -1 of B 1b and B 1a in the fruit juice samples were 9.2 and 7.8%, respectively. The results show that DLLME is a very simple, rapid, sensitive and efficient analytical method for the determination of abamectin in fruit juice samples and satisfactory results were obtained.

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Section: Effect Of Extraction Timementioning

confidence: 99%

mentioning

confidence: 99%

Determination of Abamectin by Dispersive Liquid-liquid Microextraction Combined with High-Performance Liquid Chromatography in Fruit Juice Samples

Pashazanousi¹,

Mashayekhi²,

Rezaee³

2012

Orientjchem.

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“…The main disadvantage of ternary systems including DLLME [10][11][12][13][14] and HoLLE [15][16][17][18] is that the extraction solvent is generally limited to solvents of density higher than water in order to be sedimented by centrifugation. In addition, the use of high-density solvents as extractants limits wider applicability of DLLME and HoLLE.…”

Section: Introductionmentioning

confidence: 99%

Homogeneous Liquid-Liquid Extraction (HoLLE) via Flotation Combined with Gas Chromatography-Flame Ionization Detection as a Very Simple, Rapid and Sensitive Method for the Determination of Fenitrothion in Water Samples

Mashayekhi

2013

ANAL. SCI.

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Homogeneous liquid-liquid extraction via flotation assistance (HoLLE-FA) and gas chromatography-flame ionization detection (GC-FID) was presented for the extraction and determination of fenitrothion in water samples. In this work, a rapid, simple and efficient HoLLE-FA method was developed based on applying low-density organic solvents without employing centrifugation. A special extraction cell was designed to facilitate the collection of low-density solvent extraction in the determination of fenitrothion in water samples. The water sample solution was added into an extraction cell that contained an appropriate mixture of extraction and homogeneous solvents. By using air flotation, the organic solvent was collected at the conical part of the designed cell. Under the optimum conditions, the method performance was studied in terms of the linear dynamic range (LDR from 1.0 up to 100 μg L -1 ), linearity (r 2 > 0.998), and precision (repeatability < 8.0%). Also, limit of detection (LOD) of 0.4 μg L -1 was obtained for fenitrothion. The applicability of the HoLLE-FA method was evaluated by the extraction and determination of fenitrothion in three different water samples.

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“…A new procedure, called dispersive liquid-liquid microextraction (DLLME) has received much attention for sample pretreatment [6][7][8][9][10]. In this method, an appropriate mixture of the extraction solvent and dispersive solvent is injected into the aqueous sample by a syringe to form a cloudy solution.…”

Section: Introductionmentioning

confidence: 99%

Determination of thiobencarb in water samples by gas chromatography using a homogeneous liquid-liquid microextraction via flotation assistance procedure

Mashayekhi¹

2013

Bull. Chem. Soc. Eth.

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ABSTRACT. Homogeneous liquid-liquid microextraction via flotation assistance (HLLME-FA) coupled with gas chromatography-flame ionization detection (GC-FID) was applied for the extraction and determination of thiobencarb in water samples. In this study, a special extraction cell was designed to facilitate collection of the low-density solvent extraction. No centrifugation was required in this procedure. The water sample solution was added into the extraction cell which contained an appropriate mixture of toluene (as an extraction solvent) and acetone (as a homogeneous solvent). By using air flotation, the organic solvent was collected at the conical part of the designed cell. The effect of the different parameters on the efficiency of extraction such as type and volume of extraction and homogeneous solvents, ionic strength and extraction time were studied and optimized. Under the optimal conditions, linearity of the method was in the range of 1.0-200 µg L -1. The relative standard deviations in the real samples varied from 7.8-11.7 % (n = 3). The proposed method was successfully applied to analysis of thiobencarb in the water samples and satisfactory results were obtained.

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Rapid and sensitive determination of biphenyl and biphenyl oxide in water samples using dispersive liquid–liquid microextraction followed by gas chromatography

Cited by 24 publications

References 9 publications

Determination of Abamectin by Dispersive Liquid-liquid Microextraction Combined with High-Performance Liquid Chromatography in Fruit Juice Samples

Determination of Abamectin by Dispersive Liquid-liquid Microextraction Combined with High-Performance Liquid Chromatography in Fruit Juice Samples

Homogeneous Liquid-Liquid Extraction (HoLLE) via Flotation Combined with Gas Chromatography-Flame Ionization Detection as a Very Simple, Rapid and Sensitive Method for the Determination of Fenitrothion in Water Samples

Determination of thiobencarb in water samples by gas chromatography using a homogeneous liquid-liquid microextraction via flotation assistance procedure

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