PMID- 30343481 OWN - NLM STAT- MEDLINE DCOM- 20191118 LR - 20191118 IS - 1559-0720 (Electronic) IS - 0163-4984 (Linking) VI - 190 IP - 1 DP - 2019 Jul TI - Simultaneous Functionalization and Reduction of Magnetic Graphene Oxide by L-Histidine and its Application for Magnetic Separation/Preconcentration of Antioxidant Trace Elements. PG - 262-272 LID - 10.1007/s12011-018-1545-1 [doi] AB - In the present study, for the first time, the magnetic graphene oxide was simultaneously functionalized and reduced with the aim of imidazole-based L-histidine amino acid (rGO/Fe(3)O(4)-histidine). The prepared nanocomposite was characterized by field emission scanning electron microscopy, energy dispersive X-ray spectroscopy, Raman spectroscopy, and vibrating sample magnetometer. The synthesized rGO/Fe(3)O(4)-histidine nanosheets were implied for solid phase extraction of ultra-trace amounts of Zn(2+), Cu(2+)(,) and Mn(2+) from biological samples prior to ICP-OES determination. The calibration curves were linear in the concentration ranges of 0.4-182.0, 0.4-215.0, and 0.2-168.5 mug L(-1) for Zn(2+), Cu(2+), and Mn(2+), respectively. The limits of detection were 0.12, 0.10, and 0.04 mug L(-1) for Zn(2+), Cu(2+), and Mn(2+), respectively. The relative standard deviations (RSDs) at 50.0 mug L(-1) for single-sorbent repeatability and sorbent-to-sorbent reproducibility were less than 6.7 and 9.2% (n = 5), respectively. The accuracy of the method was confirmed by the analysis of a serum quality control material (QCM, Seronorm Human Serum REF NO 203105) and hair certified reference material (CRM, Human Hair IAEA-086). FAU - Amiri, Mojtaba AU - Amiri M AD - Department of Chemistry, Yazd University, Safaieh, Yazd, 89195-741, Iran. FAU - Shabani, Ali Mohammad Haji AU - Shabani AMH AD - Department of Chemistry, Yazd University, Safaieh, Yazd, 89195-741, Iran. hshabani@yazd.ac.ir. FAU - Dadfarnia, Shayessteh AU - Dadfarnia S AD - Department of Chemistry, Yazd University, Safaieh, Yazd, 89195-741, Iran. sdadfarnia@yazd.ac.ir. FAU - Sadjadi, Sodeh AU - Sadjadi S AD - Material and Nuclear Fuel Cycle School, Nuclear Science and Technology Research Institute, Tehran, Iran. LA - eng PT - Journal Article DEP - 20181020 PL - United States TA - Biol Trace Elem Res JT - Biological trace element research JID - 7911509 RN - 0 (Antioxidants) RN - 0 (Trace Elements) RN - 0 (graphene oxide) RN - 42Z2K6ZL8P (Manganese) RN - 4QD397987E (Histidine) RN - 7782-42-5 (Graphite) RN - 789U1901C5 (Copper) RN - J41CSQ7QDS (Zinc) SB - IM MH - Antioxidants/*chemistry MH - Copper/chemistry MH - Graphite/*chemistry MH - Histidine/*chemistry MH - Manganese/chemistry MH - Solid Phase Extraction MH - Spectrometry, X-Ray Emission MH - Spectrum Analysis, Raman MH - Trace Elements/*chemistry MH - Zinc/chemistry OTO - NOTNLM OT - Antioxidant trace elements OT - Functionalized graphene oxide OT - L-Histidine OT - Magnetic solid phase extraction EDAT- 2018/10/22 06:00 MHDA- 2019/11/19 06:00 CRDT- 2018/10/22 06:00 PHST- 2018/08/19 00:00 [received] PHST- 2018/10/08 00:00 [accepted] PHST- 2018/10/22 06:00 [pubmed] PHST- 2019/11/19 06:00 [medline] PHST- 2018/10/22 06:00 [entrez] AID - 10.1007/s12011-018-1545-1 [pii] AID - 10.1007/s12011-018-1545-1 [doi] PST - ppublish SO - Biol Trace Elem Res. 2019 Jul;190(1):262-272. doi: 10.1007/s12011-018-1545-1. Epub 2018 Oct 20.