Part-per-trillion determination of chlorobenzenes in water using dispersive liquid–liquid microextraction combined gas chromatography–electron capture detection

Rahnama, Reyhaneh; Assadi, Yaghoub; Shemirani, Farzaneh; Hosseini, Mohammad-Reza Milani; Jamali, Mohammad Reza

doi:10.1016/j.talanta.2006.10.039

Cited by 257 publications

(97 citation statements)

References 17 publications

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“…The result showed that salt addition had no significant effect on extraction recovery (Fig. 4), which was in accordance with other reports [34,35]. Therefore, all the extraction experiments were carried out without adding salt.…”

Section: Effect Of Saltsupporting

confidence: 90%

Determination of polybrominated diphenyl ethers in aquatic animal tissue using cleanup by freezing‐dispersive liquid–liquid microextraction combined with GC‐MS

Liu

Huang

et al. 2009

J of Separation Science

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A method for the determination of polybrominated diphenyl ethers (PBDEs) in aquatic animal tissue was developed, and it is based on cleanup by freezing-dispersive liquid-liquid microextraction (DLLME) for the pretreatment of samples with fat content. Aquatic animal tissue homogenate was extracted with acetone, and then frozen in a freezer at À801C. Fat in aquatic animal tissue was isolated from the analytes, i.e. PBDE congeners dissolved in acetone and fat formed floccules at low temperature. The supernatant was extracted using the DLLME technique. Under the optimum DLLME conditions, 0.75 mL supernatant with 33 mL chlorobenzene was added into 5.0 mL pure water, and subsequently cloudy solution was formed. After centrifuging, 1.0 mL lower phase was subjected to GC-MS analysis. Recovery test was performed at fortified concentrations of 5.0-2500 mg/kg. The detection results showed that the recoveries for each target analyte ranged from 75.3 to 127.8%. The repeatability of the proposed method by spiking aquatic animal samples at 10 mg/kg for PBDEs, expressed as RSD, n 5 5, varied between 4.3 and 10.3% (n 5 5). LOD of the proposed method for aquatic animal tissue samples were between 2.4 and 4.9 mg/kg for all the analytes.

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Section: Effect Of Saltsupporting

confidence: 90%

Determination of polybrominated diphenyl ethers in aquatic animal tissue using cleanup by freezing‐dispersive liquid–liquid microextraction combined with GC‐MS

Liu

Huang

et al. 2009

J of Separation Science

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“…19 The experimental results showed that this microextraction technique exhibited a high performance and powerful enrichment. Thus it has been successfully applied to the analysis of polycyclic aromatic hydrocarbons, 19 triazine herbicides, 20 antioxidants, 21 volatile phenols, 22 chlorophenols, 23 chlorobenzenes, 24 and organophosphorus pesticides, 25 trihalomethanes, 26 cadmium, 27 palladium and cobalt. 28 However, the enrichment performance of atrazine and simazine was not ideal with carbon tetrachloride and acetone as the extraction solvent and disperser solvent.…”

Section: Introductionmentioning

confidence: 99%

Determination of Atrazine and Simazine in Environmental Water Samples by Dispersive Liquid–Liquid Microextraction with High Performance Liquid Chromatography

et al. 2009

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This paper describes a new method for the rapid and sensitive analysis of atrazine and simazine based on the dispersive liquid-liquid microextraction with carbon tetrachloride and methanol as the extraction solvent and disperser solvent. Under the optimal conditions, there are excellent linear relationships between the peak area and the concentration in the range of 0.5 -50 mg L -1 for atrazine and 0.1 -50 mg L -1 for simazine. The limits of detection were 0.1 and 0.04 mg L -1 for atrazine and simazine, respectively. The proposed method was also applied to the analysis of real water samples, and excellent results were achieved with spiked recoveries in the range of 60.7 -91.4%. All these results demonstrate that the proposed method would be widely used in many fields in the future.

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“…The miniaturized pre-concentration method based on LLE including, single drop microextraction (SDME) [17], hollow fiber liquid phase microextraction (HF-LPME) [18], homogeneous liquid-liquid extraction [19], and dispersive liquid-liquid microextraction (DLLME) [20,21]. Solidified floating organic drop microextraction (SFODME) was introduced as one of these by Khalili Zanjini et al [22].…”

Section: Introductionmentioning

confidence: 99%

Solidified Floating Organic Drop Microextraction–electrothermal Atomic Absorption Spectrometry for the Determination of Trace Amounts of Lead in Water Samples

2017

MJAS

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Solidified floating organic drop microextraction (SFODME) was utilized as a separation or pre-concentration step prior to electrothermal atomic absorption spectrometric (ETAAS) determination of ultra-trace amounts of lead. The method was based on the formation of an extractable complex between Pb(II) and 1-(2-pyridylazo)-2-naphathol (PAN) as a chelating agent. The main parameters affecting the performance of SFODME, namely, type and volume of organic solvent, pH, concentration of the chelating agent, extraction time, stirring rate, extraction temperature, disperser solvent, ionic strength, and interference effect were investigated and optimized. Under optimized experimental conditions a pre-concentration factor of 22.03 and a detection limit of 0.064 μg L -1 for the pre-concentration from 13.0 mL water sample was achieved. The relative standard deviation of the measurements in the range of 1.3 -2.5% (n = 6). The proposed method was assessed through the analysis of certified reference water and recovery experiment with satisfactory results.Keywords: solidified floating organic drop microextraction, lead, electrothermal atomic absorption spectrometry, water samples Abstract Pengekstrakan mikro pemejalan titisan organik terapung (SFODME) digunakan sebagai langkah pemisahan atau pemekatan sebelum penentuan jumlah surih plumbum ditentukan menngunakan spektrometri serapan atom elektrotermal (ETAAS). Kaedah ini berasaskan kepada pembentukkan kompleks yang boleh diekstrak di antara Pb(II) dan 1-(2p-piridilazo)-2-naphol (PAN) sebagai agen pengkelat. Parameter utama yang memberi kesan kepada prestasi SFODME iaitu jenis dan isipadu pelarut organik, pH, kepekatan agen pengkelat, masa pengekstrakan, kesan pengacauan, suhu pengesktrakan, pelarut serakan, kekuatan ionik dan kesan gangguan telah dikaji dan dioptimumkan. Keadaan optimum bagi eksperimen diperolehi dengan faktor pemekatan pada 22.03 dan had pengesanan dicapai pada 0.064 μg L -1 bagi pemekatan 13.0 mL sampel air. Pengukuran sisihan piawai relatif berada pada julat 1.3 -2.5% (n = 6). Kaedah yang dicadangkan juga dinilai melalui analisis sampel air rujukan yang disahkan dan ujian perolehan semula yang mencapai keputusan memuaskan.Kata kunci: pengekstrakan mikro pemejalan titisan organik terapung, plumbum, spektrometri serapan atom elektrotermal, sampel air

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Part-per-trillion determination of chlorobenzenes in water using dispersive liquid–liquid microextraction combined gas chromatography–electron capture detection

Cited by 257 publications

References 17 publications

Determination of polybrominated diphenyl ethers in aquatic animal tissue using cleanup by freezing‐dispersive liquid–liquid microextraction combined with GC‐MS

Determination of polybrominated diphenyl ethers in aquatic animal tissue using cleanup by freezing‐dispersive liquid–liquid microextraction combined with GC‐MS

Determination of Atrazine and Simazine in Environmental Water Samples by Dispersive Liquid–Liquid Microextraction with High Performance Liquid Chromatography

Solidified Floating Organic Drop Microextraction–electrothermal Atomic Absorption Spectrometry for the Determination of Trace Amounts of Lead in Water Samples

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