TY - JOUR ID - 55684 TI - Extraction, preconcentration and spectrometric determination of Al (III) and Cr (III) ions using modified MnFe2O4 nanoparticles as an efficient adsorbent JO - Nanochemistry Research JA - NCR LA - en SN - 2538-4279 AU - Pourghazi, Kamyar AU - Amoli Diva, Mitra AU - Karimi, Shahla AD - Department of Chemistry, Karazmi (Tarbiat Moalem) University, Tehran, Iran AD - Faculty of Physics, Sharif University of Technology, Tehran, Iran AD - Department of Chemistry, Islamic Azad University Central Tehran Branch, Tehran, Iran Y1 - 2017 PY - 2017 VL - 2 IS - 2 SP - 223 EP - 229 KW - FAAS KW - GF-AAS KW - Magnetic solid phase extraction KW - Modified MnFe2O4 NPs KW - Water samples DO - 10.22036/ncr.2017.02.009 N2 - An efficient and reusable adsorbent, namely 3-mercaptopropionic acid modified tetraethyl orthosilicate (TEOS) grafted MnFe2O4 nanoparticles (MPA-TEOS-MnFe2O4 NPs) was synthesized and used for the extraction and preconcentration of trace amount of Al (III) and Cr (III) ions in water samples. MnFe2O4 NPs were prepared by chemical co-precipitation of manganese (II) and iron (III) salts in alkaline medium and then, modified by TEOS to create an inert layer preventing nanoparticle agglomeration. The TEOS-MnFe2O4 NPs were then modified with MPA to produce an adsorbent with carboxylic acid functional groups which have tendency to hard metal ions such as Al(III) and Cr (III). The prepared adsorbent was characterized by SEM, XRD, VSM and FT-IR techniques. The Al (III) and Cr(III) ions were measured by graphite furnace and flame atomic absorption spectrometric techniques, respectively. Various factors affecting extraction/desorption efficiency of target ions were investigated and analytical characteristics of the method were determined and detection limits of 0.5 and 0.2 ng mL-1 with preconcentration factor of 69 and 72 were obtained for Al (III) and Cr(III) ions, respectively. The results revealed that the adsorbent has high capacity and good reusability for extraction/preconcentration of target metal ions in tap and drinking water samples. UR - http://www.nanochemres.org/article_55684.html L1 - http://www.nanochemres.org/article_55684_d61c9395211a29a4f0b877e738e382c4.pdf ER -