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Ion chromatographic determination of hydrolysis products of hexafluorophosphate salts in aqueous solution


Terborg, L and Nowak, S and Passerini, S and Winter, M and Karst, U and Haddad, PR and Nesterenko, PN, Ion chromatographic determination of hydrolysis products of hexafluorophosphate salts in aqueous solution, Analytica Chimica Acta, 714 pp. 121-126. ISSN 0003-2670 (2012) [Refereed Article]

Copyright Statement

Copyright 2011 Elsevier B.V.

DOI: doi:10.1016/j.aca.2011.11.056


In this work, hydrolysis of three different hexafluorophosphate salts in purified water was investigated. Aqueous samples of lithium hexafluorophosphate (LiPF6), sodium hexafluorophosphate (NaPF6) and potassium hexafluorophosphate (KPF 6) were prepared and stored for different times. Ion chromatography (IC) with UV as well as non-suppressed and suppressed conductivity detection was used for the analysis of the reaction products. For the detection and identification of the formed decomposition products, an IC method using IonPac AS14A 250mm 4.0mm i.d. column and 2.5mM KHCO3-2.5mM K2CO3 eluent was established. Besides hexafluorophosphate, four other anionic species were detected in fresh and matured aqueous solutions. The hydrolysis products fluoride (F-), monofluorophosphate (HPO3F-), phosphate (HPO42-) and difluorophosphate (PO2F2-) were found and were unambiguously identified by means of standards or electrospray ionization mass spectrometry (ESI-MS). It was shown that stability of hexafluorophosphate solutions depends on the nature of the counter ion and decreases in the order potassium>sodium>lithium.

Item Details

Item Type:Refereed Article
Keywords:hexafluorophosphate salts, ion chromatography, hydrolysis, photometric detection, conductivity
Research Division:Chemical Sciences
Research Group:Analytical chemistry
Research Field:Separation science
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the chemical sciences
UTAS Author:Terborg, L (Ms Lydia Terborg)
UTAS Author:Haddad, PR (Professor Paul Haddad)
UTAS Author:Nesterenko, PN (Professor Pavel Nesterenko)
ID Code:82807
Year Published:2012
Web of Science® Times Cited:118
Deposited By:Austn Centre for Research in Separation Science
Deposited On:2013-02-19
Last Modified:2017-10-30

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