Journal
ANALYTICA CHIMICA ACTA
Volume 714, Issue -, Pages 121-126Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.aca.2011.11.056
Keywords
Hexafluorophosphate salts; Ion chromatography; Hydrolysis; Photometric detection; Conductivity
Categories
Funding
- Australian Centre for Research on Separation Science (ACROSS), University of Tasmania, Hobart, Australia
- Australian Research Council [FF0668673]
- Australian Research Council [FF0668673] Funding Source: Australian Research Council
Ask authors/readers for more resources
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 (KPF6) 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 250 mm x 4.0 mm id. column and 2.5 mM KHCO3-2.5 mM 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. (C) 2011 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available