Double logarithmic, linear relationship between plasma chloride concentration and time since death in humans in Chandigarh Zone of North-West India.

Estimation of time since death with the change in chloride concentration in postmortem blood is the topic of discussion in the study. Querido (Forensic Sci Int 45 (1990) 117) had demonstrated a highly significant double logarithmic linear relationship between the plasma chloride concentration and postmortem interval in Wistar rats. Henceforth, the present study was carried out to substantiate this propensity in humans.

Linearization of the relationship between serum sodium, potassium concentration, their ratio and time since death in Chandigarh zone of north-west India.

A strong relationship was established between the ratio of postmortem serum sodium and potassium concentrations and time since death by Querido in wistar rats. Henceforth, the present study was carried out to substantiate this inclination in humans. Flame photometric estimation of sodium and potassium concentration in postmortem blood of 474 subjects revealed a highly significant relationship between logarithm serum sodium as well as potassium concentration, logarithm of their ratio and the logarithim of the time since death during the first 3-58 h of death.