PMID- 24148394 OWN - NLM STAT- MEDLINE DCOM- 20140603 LR - 20131023 IS - 1873-3573 (Electronic) IS - 0039-9140 (Linking) VI - 116 DP - 2013 Nov 15 TI - Graphite furnace atomic absorption spectrometric detection of vanadium in water and food samples after solid phase extraction on multiwalled carbon nanotubes. PG - 205-9 LID - S0039-9140(13)00443-8 [pii] LID - 10.1016/j.talanta.2013.05.020 [doi] AB - Vanadium(V) ions as 8-hydroxyquinoline chelates were loaded on multiwalled carbon nanotubes (MWNTs) in a mini chromatographic column. Vanadium was determined by graphite furnace atomic absorption spectrometry (GFAAS). Various analytical parameters including pH of the working solutions, amounts of 8-hydroxyquinoline, eluent type, sample volume, and flow rates were investigated. The effects of matrix ions and some transition metals were also studied. The column can be reused 250 times without any loss in its sorption properties. The preconcentration factor was found as 100. Detection limit (3 s) and limit of quantification (10 s) for the vanadium in the optimal conditions were observed to be 0.012 microg L(-1) and 0.040 mug L(-1), respectively. The capacity of adsorption was 9.6 mg g(-1). Relative standard deviation (RSD) was found to be 5%. The validation of the method was confirmed by using NIST SRM 1515 Apple leaves, NIST SRM 1570a Spinach leaves and GBW 07605 Tea certified reference materials. The procedure was applied to the determination of vanadium in tap water and bottled drinking water samples. The procedure was also successfully applied to microwave digested food samples including black tea, coffee, tomato, cabbage, zucchini, apple and chicken samples. CI - Copyright (c) 2013 Elsevier B.V. All rights reserved. FAU - Wadhwa, Sham Kumar AU - Wadhwa SK AD - Gaziosmanpasa University, Faculty of Science and Arts, Chemistry Department, 60250 Tokat, Turkey; National Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro 76080, Pakistan. FAU - Tuzen, Mustafa AU - Tuzen M FAU - Gul Kazi, Tasneem AU - Gul Kazi T FAU - Soylak, Mustafa AU - Soylak M LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20130516 PL - Netherlands TA - Talanta JT - Talanta JID - 2984816R RN - 0 (Environmental Pollutants) RN - 0 (Membranes, Artificial) RN - 0 (Nanotubes, Carbon) RN - 0 (Tea) RN - 00J9J9XKDE (Vanadium) RN - 5UTX5635HP (Oxyquinoline) SB - IM MH - Animals MH - Chickens MH - Environmental Pollutants/*isolation & purification MH - Equipment Reuse MH - Fresh Water/*chemistry MH - Humans MH - Hydrogen-Ion Concentration MH - Limit of Detection MH - Malus/chemistry MH - Meat/*analysis MH - Membranes, Artificial MH - Nanotubes, Carbon/chemistry MH - Oxyquinoline/chemistry MH - Plant Leaves/*chemistry MH - Reproducibility of Results MH - Solid Phase Extraction/*methods MH - Spectrophotometry, Atomic MH - Spinacia oleracea/chemistry MH - Tea/chemistry MH - Vanadium/*isolation & purification OTO - NOTNLM OT - 8-hydroxyquinoline OT - Atomic absorption spectrometry OT - Multiwalled carbon nanotubes OT - Solid phase extraction OT - Vanadium EDAT- 2013/10/24 06:00 MHDA- 2014/06/04 06:00 CRDT- 2013/10/24 06:00 PHST- 2013/04/09 00:00 [received] PHST- 2013/05/04 00:00 [revised] PHST- 2013/05/10 00:00 [accepted] PHST- 2013/10/24 06:00 [entrez] PHST- 2013/10/24 06:00 [pubmed] PHST- 2014/06/04 06:00 [medline] AID - S0039-9140(13)00443-8 [pii] AID - 10.1016/j.talanta.2013.05.020 [doi] PST - ppublish SO - Talanta. 2013 Nov 15;116:205-9. doi: 10.1016/j.talanta.2013.05.020. Epub 2013 May 16.