_1582626634 1582626634 Hamid Shirkhanloo sahar.zi67@gmail.com Hamid Shirkhanloo Analytical Methods in Environmental Chemistry Journal AMECJournal 2645-5382 2645-5552 12 25 2019 2 04 10.24200/amecj.v2.i04 http://journal.amecj.com/index.php/AMECJ-01/issue/view/10 Ahmad Riahi Elham Mosafa Bahareh Fahimirad A novel analytical method based on centrifuging dispersive liquid-liquid microextraction (CD-LLME) procedure for pre-concentration of As (III) has been developed prior to determine by hydride generation atomic absorption spectrometry (HG-AAS). In this method, 0.1 g of a task-specific ionic liquids (methyltrioctylammonium 2-mercaptobenzoate; TOMAS; TSIL) as the extracting and complexing solvent and acetone as dispersant solvent were rapidly added into the water and blood samples at pH 4.5. The As (V) is simply calculated by difference between total concentration and inorganic forms As (III) in liquid samples. By optimizing parameters, the enrichment factor (EF) was obtained 9.8 and 49.6 for blood and water samples, respectively. The limit of detection (LOD) of 22.4 ngL-1 and 4.3 ngL-1 were achieved for 10 mL and 50 mL of As(III) in blood and water samples, respectively (RSD<%5). The real samples were validated by certified reference material (CRM) by proposed procedure. 12 27 2019 39 48 http://creativecommons.org/licenses/by/4.0 10.24200/amecj.v2.i04.83 http://journal.amecj.com/index.php/AMECJ-01/article/view/83 http://journal.amecj.com/index.php/AMECJ-01/article/download/83/153 http://journal.amecj.com/index.php/AMECJ-01/article/download/83/153 http://journal.amecj.com/index.php/AMECJ-01/article/download/83/154