Department of Chemistry, Faculty of Sciences, Tarbiat Modares University, P.O. Box 14115-175, Tehran, Iran.
J Hazard Mater. 2010 Jun 15;178(1-3):766-70. doi: 10.1016/j.jhazmat.2010.02.006. Epub 2010 Feb 6.
A new dispersive liquid-liquid microextraction method based on solidification of floating organic drop (DLLME-SFO) combined with inductively coupled plasma-optical emission spectrometry (ICP-OES) was developed for the determination of aluminium. An appropriate mixture of acetone and 1-undecanol was injected rapidly into the aqueous sample containing aluminium-morin complex and as a result cloudy mixture was formed. After centrifugation, the test tube was cooled for 5 min. The solidified 1-undecanol on top of the solution was transferred into a suitable vial. Then, 100 microL of it was dissolved in 100 microL of 1-propanol and finally injected into the ICP-OES. Under the optimum conditions, the enhancement factor of 128 was obtained for only 20.0 mL of the water sample. The calibration graph was linear in the range of 1.0-250.0 microg L(-1) with the limit of detection of 0.8 microg L(-1). The relative standard deviation (RSD) for five replicate measurements of aluminium was 4.5%.
基于固-液萃取（DLLME-SFO）的新型分散液相微萃取方法，结合电感耦合等离子体-原子发射光谱法（ICP-OES），用于测定铝。将适量的丙酮和 1-十一醇快速注入含有铝-桑色素络合物的水溶液中，形成混浊混合物。离心后，试管冷却 5 分钟。将溶液顶部的凝固 1-十一醇转移到合适的小瓶中。然后，将 100μL 溶解在 100μL 1-丙醇中，最后注入 ICP-OES。在最佳条件下，仅对 20.0mL 水样进行 128 倍的增强。校准曲线在 1.0-250.0μg L(-1)范围内呈线性，检出限为 0.8μg L(-1)。五次重复测量铝的相对标准偏差（RSD）为 4.5%。
