Determination of mu-amounts of beryllium in urine.
Methylene Blue and tannin are used to collect beryllium from urine by co-precipitation. After ignition the beryllium is brought into solution and determined fluorimetrically with Morin. When the amount of beryllium is less than 0.1 microg, measurements are carried out at low temperature to prevent fading of the fluorescence. In this method beryllium is collected and separated in a single step and no prior treatment of the urine sample is required either to destroy the organic matter or to remove the inorganic constituents present in it. The relative standard deviations for the determination of 0.1 and 0.02 microg of Be/100 ml of urine sample were 9 and 19% respectively.
Desai
S R
SR
Analytical Division, Bhabha Atomic Research Centre, Trombay, Bombay-14, India.
Sudhalatha
K K
KK