“…ELCHHOLZ et al [1] studied the adsorption of some radioisotopes on glass and polypropylene, and concluded that plastic Containers were not necessarily superior to glass in tracer work. Many investigators [2][3][4][5][6][7][8][9][10][11][12][13][14][15] have also reported on the adsorption properties of various radioisotopes on the surfaces of plastics and glass.…”