Development of Dispersive Liquid–Liquid Microextraction Based on Solidification of Floating Organic Drop for the Determination of Trace Lead in Water |
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| Authors: | Jing‐Wen Zhang Yu‐Kun Wang Hai‐Ying Du Xin Du Jing‐Jun Ma Jing‐Ci Li |
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| Institution: | 1. Hebei Key Laboratory of Bioinorganic Chemistry, College of Science, Agricultural University of Hebei, Baoding, P. R. China;2. Institute of Cotton, Hebei Academy of Agriculture and Forestry Sciences, Shijiazhuang, P. R. China |
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| Abstract: | A new method for determining lead (Pb) content was developed by dispersive liquid–liquid microextraction based on the solidification of floating organic droplets followed by flame atomic absorption spectrometry. Under optimum conditions, the calibration graph was linear within the Pb content range of 8.43–400 µg L?1 with a detection limit of 2.53 µg L?1. The relative standard deviation for 10 replicate measurements of 20 and 400 µg L?1 of Pb were 3.41 and 2.78%, respectively. The proposed method was assessed through the analysis of certified reference water and recovery experiments. |
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| Keywords: | Dispersive liquid– liquid microextraction Flame atomic absorption spectrometry Lead Solidification of floating organic drop Water analysis |
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