A Note on the Magnesia Magma Heavy Metals Test**Scientific Section, A. Ph. A., Dallas meeting, 1936.

✍ Scribed by Osol, Arthur ;Tice, Linwood F.

• Publisher: Elsevier
• Year: 1937
• Weight: 222 KB
• Volume: 26
• Category: Article
• ISSN: 0898-140X
• DOI: 10.1002/jps.3080260306

✦ Synopsis

The U. S. P. X I test for heavy metals in magnesia magma is as follows:

"To 5 cc. of Magnesia Magma, add 10 cc. of diluted hydrochloric acid and 10 cc. of distilled water, mix thoroughly, and filter if necessary. Warm the'solution to 50' C., add 25 cc. of freshly prepared hydrogen sulfide T.S., and allow the mixture to stand at room temperature for ten minutes. When viewed in a Nessler tube, looking downward through the column of liquid above a white surface, the solution does not show a deeper coloration than that produced by 25 cc. of distilled water, to which 0.5 cc. of lead nitrate solution, containing 0.1599 Gm. of lead nitrate in 1000 cc. of distilled water, has been added, and treated as directed in the foregoing procedure for the Magnesia Magma."