[Evaluation of ion activity in determining time of death].

Activity of potassium ions was examined in 3 liquid media of 54 rabbit cadavers by potentiometry with the use of a potassium-selective valinomycin electrode. The reported and obtained data were used for the development of the diagnostic regression equations and the curves to define the time of death from the activity of a complex of 3 ions (potassium, sodium and hydrogen) in the blood serum, CSF and vitreous body fluid. The method is offered for appropriate trials in human cadavers.

[Dynamics of sodium and hydrogen ionic activity as a criterion for determining time of death].

The paper is concerned with a procedure for determination of the death onset. The time course of changes in the activity of sodium and hydrogen ions in the blood, CSF and vitreous body was examined in 42 rabbit cadavers. The animals were killed by air embolism.