PMID- 27847312 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20180108 LR - 20180717 IS - 1873-3557 (Electronic) IS - 1386-1425 (Linking) VI - 173 DP - 2017 Feb 15 TI - The alternative use of layered double hydroxides as extraction medium coupled with microcomplexation for determination of phosphate in water samples. PG - 994-1000 LID - S1386-1425(16)30655-2 [pii] LID - 10.1016/j.saa.2016.11.002 [doi] AB - A simple, rapid, in situ, and green extraction combined with a microcomplexation has been developed for the spectrophotometric determination of phosphate in water samples. Through their formation, layered double hydroxides (LDHs) were employed as the extraction medium, instantly commenced by a rapid addition of a mixed solution of Mg(2+) and Al(3+) ions into alkaline phosphate solution. After the extraction, LDH precipitate containing phosphate was dissolved by sulfuric acid and the released phosphate was subsequently detected via its complexation with molybdate in the presence of antimonyl and ascorbic acid. Under optimum conditions, the linearity in the range of 5-200mugL(-1), with the correlation coefficient (r(2)) of 0.9969, and the enrichment factor (EF) of 14 were obtained. The limit of detection (LOD) of 5mugL(-1) and good precision, with the relative standard deviations (RSDs) less than 8.16%, were achieved. The proposed method was successfully applied to determine phosphate in water samples and the relative recoveries of 72.97-115.32% were obtained. CI - Copyright (c) 2016 Elsevier B.V. All rights reserved. FAU - Gissawong, Netsirin AU - Gissawong N AD - Materials Chemistry Research Center, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand. FAU - Sansuk, Sira AU - Sansuk S AD - Materials Chemistry Research Center, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand. FAU - Srijaranai, Supalax AU - Srijaranai S AD - Materials Chemistry Research Center, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand. Electronic address: supalax@kku.ac.th. LA - eng PT - Journal Article DEP - 20161103 PL - England TA - Spectrochim Acta A Mol Biomol Spectrosc JT - Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy JID - 9602533 OTO - NOTNLM OT - Extraction medium OT - Layered double hydroxides OT - Phosphate OT - UV-vis spectrophotometry OT - Water sample EDAT- 2016/11/17 06:00 MHDA- 2016/11/17 06:01 CRDT- 2016/11/17 06:00 PHST- 2016/04/07 00:00 [received] PHST- 2016/08/12 00:00 [revised] PHST- 2016/11/01 00:00 [accepted] PHST- 2016/11/17 06:00 [pubmed] PHST- 2016/11/17 06:01 [medline] PHST- 2016/11/17 06:00 [entrez] AID - S1386-1425(16)30655-2 [pii] AID - 10.1016/j.saa.2016.11.002 [doi] PST - ppublish SO - Spectrochim Acta A Mol Biomol Spectrosc. 2017 Feb 15;173:994-1000. doi: 10.1016/j.saa.2016.11.002. Epub 2016 Nov 3.