[Analytical findings in the X-ray fluorescence of blood levels of bromine in subjects anesthetized with halothane].

Bromine concentration in the blood of seven patients anesthetized with Halothane are determined at different time before, during and after anesthetic induction. X.R.F. technique was employed in the analytical determinations using a new background correction method which assume a linear relationship between primary Compton in matrix of monocromathic source radiation and background counts. Mini mun Detectable Limits are of - 5 p.p.m. and accuracy of 3% at 20-30 p.p.m. concentration. 24 h after anesthesia Bromine levels are always significantly high (-20 p.p.m.); the clinical importance of these data are discussed.