Determination of the Equilibrium Constants of Alkylphosphinic Acids by Inductively Coupled Plasma-Atomic Emission Spectrometry

M. MARTINEZ; N. MIRALLES; A. SASTRE; C. HERRANZ

doi:10.2116/analsci.8.613

M. MARTINEZ, N. MIRALLES, A. SASTRE, C. HERRANZ

Author information

Keywords: Mono(2,4,4-trimethylpentyl)phosphinic acid, dioctyl phosphinic acid, monooctylphosphinic acid, inductively coupled plasma-atomic emission spectrometry, dimerization constant, distribution constant, acidity constant

JOURNAL FREE ACCESS

1992 Volume 8 Issue 5 Pages 613-617

DOI https://doi.org/10.2116/analsci.8.613

Details

Abstract

The equilibrium constants of some organophosphinic acids have been determined at 25°C by measuring the distribution ratio of the organophosphinic acid between an aqueous solution of ionic strength 0.05 and toluene as a function of pH for different concentrations of organophosphorus acid compounds. The distribution ratio of the organophosphorus compounds has been obtained by determining phosphorus by inductively coupled plasma-atomic emission pectroscopy. The data have been analyzed graphically, and numerically by the program LETAGROP-DISTR, in order to determine the dimerization constants K₂, the acidity constants K_a and the distribution constants K_D

Corresponding author

Register with J-STAGE for free!