Determination of Traces of Beryllium in Biological Material

Spectrographic Determination of Beryllium in Urine and Air

“…Various spectrographic procedures have been described in recent years (1, S, 4, 6), all of which employ the direct current arc. A fluorometric method using morin, which achieves the desired sensitivity by using large quantities of urine, has also been described (5).…”

History, uses, occurrences, analytical chemistry, and biochemistry of beryllium. A review

“…The simple can be dry ashed in a f~r n a c e , ,~-~" or it can be wet ashed using an oxidizing acid such as HNO, or HC104 ; combinations of acids are also used. 19,29,32,[36][37][38][39][41][42][43][44][45][46][47][48] [n the 1940's and early 1950's, chemists reported erratic results upon dry and wet ashing. Aldridge …”

“…Perhaps the oldest and one of the easiest means of separation involves coprecipitation of beryllium hydroxide4, 51 or beryllium p h o~p h a t e~~,~~~-~, 429 45 with other insoluble hydroxides or phosphates. This method usually separates the beryllium from organic materials and other soluble ions.…”

“…It also concentrates the beryllium and is apparently quantitative down to submicrogram amounts of beryllium. 36,38,42,45 The mercury cathode technique is another separation me t h~d .~~, 43> 45,469 52 Many transition metals can be reduced and deposited onto a mercury cathode, leaving all of the beryllium in solution.…”

Fluorometric Determination of Traces of Beryllium

“…Two electrolysis vessels have been used. The one designed by Klemperer and Martin (7) has proved to be very good. A simple one which gives the same results was designed.…”