Abstract
A new method and a rigorous procedure are proposed for the determination of the solubility of aliphatic amines (AA) in water. The method is based on cyclic voltammetry (CV). CV titrations were performed at acidic buffered pH at a controlled ionic strength (I). In those conditions the AA are completely soluble and nonvolatile. The pH and I control is necessary to obtain rigorous thermodynamic data, and it allows to avoid some possible procedural errors which can be highlighted in the reported solubility data. The solubility constants of tri-n-propylamine, tri-n-butylamine, and tri-n-isobuthylamine were obtained at 25 °C and resulted to be (1.7 ± 0.1)·10–3, (2.7 ± 0.5)·10–5, and (3 ± 1)·10–7, respectively. From these constants, the solubility values of 6.7 ± 0.8 mM, 0.95 ± 0.09 mM, and 0.044 ± 0.008 mM, respectively, were computed. The proposed method allowed to determine thermodynamic results also for the poorly water-soluble tri-n-isobuthylamine, for which no solubility data were hitherto available in the...
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
