_1591678620 1591678620 Hamid Shirkhanloo sahar.zi67@gmail.com Hamid Shirkhanloo Analytical Methods in Environmental Chemistry Journal AMECJournal 2645-5382 2645-5552 03 30 2020 3 01 10.24200/amecj.v3.i01 http://journal.amecj.com/index.php/AMECJ-01/issue/view/11 Azwan Morni Seyed Mojtaba Mostafavi *© A efficient method based on 4-methylsulfanyl thiophenol (MSTP, C7H8S2) and ionic liquid    ([BMIM][PF6]) was used for mercury (Hg) separation and preconcentration from wastewater of  petrochemical industries. The 0.01 mile molar of MSTP, 80 mg of [BMIM][PF6] was diluted with  0.2 mL of ethanol (ET 98%). The mixture was injected to 10 mL of wastewater samples, shacked by ultrasonic bath for 5.0 min and cloudy solution was achieved by ionic liquid micelles  at pH=7.0. The  mercury ions was complexed with MSTP and extracted on micelles (IL/ET) by cloud point dispersive liquid-liquid microextraction (CP-DLLME) at 50oC before determined by cold vapor atomic absorption spectrometry (CV-AAS). The favorite extraction for mercury with low LOD (15 ng L-1) and good linear rages (0.05- 6.2 μg L-1) was achieved (RSD<5%). The main parameters such as, pH, sample volumes, amount of MSTP, amount of IL and ultra-sonic time were optimized.  03 30 2020 63 71 http://creativecommons.org/licenses/by/4.0 10.24200/amecj.v3.i01.97 http://journal.amecj.com/index.php/AMECJ-01/article/view/97 http://journal.amecj.com/index.php/AMECJ-01/article/download/97/182 http://journal.amecj.com/index.php/AMECJ-01/article/download/97/182 http://journal.amecj.com/index.php/AMECJ-01/article/download/97/183