Retention of metabolised trace elements in biological tissues following different drying procedures. Part II. Caesium, cerium, manganese, scandium, silver and tin in rat tissues.

Abstract

Losses of silver, cerium, caesium, manganese, scandium and tin during freeze drying and oven drying at 80, 105 and 120 °C were studied in rat tissues and faces that contained radioactive isotopes. No loss was observed for any of these elements on freeze drying. A significant loss of tin was observed in muscle even at 80 °C, and in kidney and liver at 105 °C. Also, cerium and manganese were lost from heart and muscle at this temperature. An increase in the temperature to 120 °C was found to be safe only for silver and caesium in all of the tissues. For the remaining four elements the following losses were observed: up to 5% for cerium in brain and heart, for scandium in fur and heart and for manganese in liver and muscle; up to 10% for scandium in kidney and muscle and for tin in blood, fur, heart, liver, ovary and uterus; and over 10% for tin in brain, kidney, lung and muscle.