Liquid scintillation spectrometry of tritium in the investigation of compound adsorption at a water/nonpolar liquid interface

The Distribution of mixtures of dodecyl ether of poly(23)ethylene glycol with sodium dodecyl sulfate and dodecyltrimethylammonium bromide in the water/octane system

“…The exper iment was carried out in a scintillation vial (7 ml, Wal lac Oy, Finland). [11]. In studies of the behavior of indi vidual surfactants, the aqueous phase was solutions of the substances studied with a specific radioactivity of 37 kBq/ml for SDS and DTAB and 3.7 kBq/ml for Brij 35.…”

“…(chemically pure) grade. Scintillating admixtures to octane were naphthalene (3.8%) and 2,5 diphenyloxazole (0.38%) [11]. All the substances were of kh.…”

“…To study two phase systems aqueous solution of the surfactant/octane, 2 ml of a scintillating octane were added to 2 ml of an aqueous solution [11]. The exper iment was carried out in a scintillation vial (7 ml, Wal lac Oy, Finland).…”

“…where I is the counting rate of tritium β radiation; I V is the counting rate of tritium β radiation in the volume of scintillating liquid (V); I S is the counting rate of tri tium β radiation from the liquid/liquid interface; А sp is the specific radioactivity of tritium labeled component; c org and c W are the concentrations of the substance in the oscillating liquid and water, respectively; h is the thickness of tritium beta particles registration zone of the aqueous phase; S is the separation surface area, which is, taking into account deformation at the walls, equal to capillary length (a) and bottle radius (r) and is determined as S = π(a 2 + r 2 ); and ε is the effectiveness of recording tritium β radiation in the volume of scin tillating liquid, which is determined in independent experiments by the method described in [11].…”

“…Along with them, methods using radioactive indica tors are used [7][8][9]. The use of tritium as a radioactive label of an organic substance and liquid scintillation spectrometry in the variant of the scintillation phase method [10][11][12][13] offers much promise for studies of adsorption and distribution of surfactants of various types from individual and mixed solutions in a system of two liquids.…”