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Dispersive Liquid-liquid Microextraction Combined with Flame Atomic Absorption Spectrometry for Measurement of Trace Amount of Lead in Water Samples

Wei Liu

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Abstract

This paper introduces a method which combines dispersive liquid-liquid micro-extraction(DLLME) and flame atomic absorption spectrometry(FAAS) to measure trace amount of lead with high efficiency and sensitivity.Some effective parameters on the micro-extraction and the complex formation like the type of extraction and dispersive solvents,pH,the amount of the chelating agent,extraction time and salt addition will be selected and optimized.Under optimum conditions,the calibration graph was linear in the range of 10.0~600.0 μg/L with a detection limit of 1.35 μg/L.The relative standard deviation(RSD) for eleven replicate measurements of 20 and 400 μg/L of lead were 3.35 and 2.78%.The method was applied to the analysis of tap,river,and sea water samples.Its recovery rate is between 95.5% and 99.7%.

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What this paper is about

This paper introduces a method which combines dispersive liquid-liquid micro-extraction(DLLME) and flame atomic absorption spectrometry(FAAS) to measure trace amount of lead with high efficiency and sensitivity.Some effective parameters on the micro-extraction and the complex formation like the type of extraction and dispersive solvents,pH,the amount of the chelating agent,extraction time and salt addition will be selected and optimized.Under optimum conditions,the calibration graph was linear in the range of 10.0~600.0 μg/L with a detection limit of 1.35 μg/L.The relative standard deviation(RSD) for eleven replicate measurements of 20 and 400 μg/L of lead were 3.35 and 2.78%.The method was applied to the analysis of tap,river,and sea water samples.Its recovery rate is between 95.5% and 99.7%.

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Available abstract

This paper introduces a method which combines dispersive liquid-liquid micro-extraction(DLLME) and flame atomic absorption spectrometry(FAAS) to measure trace amount of lead with high efficiency and sensitivity.Some effective parameters on the micro-extraction and the complex formation like the type of extraction and dispersive solvents,pH,the amount of the chelating agent,extraction time and salt addition will be selected and optimized.Under optimum conditions,the calibration graph was linear in the range of 10.0~600.0 μg/L with a detection limit of 1.35 μg/L.The relative standard deviation(RSD) for eleven replicate measurements of 20 and 400 μg/L of lead were 3.35 and 2.78%.The method was applied to the analysis of tap,river,and sea water samples.Its recovery rate is between 95.5% and 99.7%.

Key concepts: Detection limit, Extraction (chemistry), Tap water, Calibration curve, Atomic absorption spectroscopy, Analytical Chemistry (journal), Trace Amounts, Chromatography

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Dispersive Liquid-liquid Microextraction Combined with Flame Atomic Absorption Spectrometry for Measurement of Trace Amount of Lead in Water Samples — Research Paper | ScholarLens