Introduction to Geochronology/U-Pb Decay Scheme/How to calibrate a mixed U-Pb tracer solution
(A) High-purity U and Pb metals.
(B) Weighing of metals. Using a balance with 0.00001 readability it is possible to weigh a 1 gram piece of metal with precision on the order of a few tens of ppm, depending upon the stability of the balance.
(C) After weighing, metals are transfered to a pre-cleaned teflon bottle for dissolution.
(D) Tracer calibration -