Micrographical studies on copper, iron, and steel

• Book ID: 104118782
• Publisher: Elsevier Science
• Year: 1913
• Tongue: English
• Weight: 66 KB
• Volume: 175
• Category: Article
• ISSN: 0016-0032
• DOI: 10.1016/s0016-0032(13)91028-0

✦ Synopsis

Rapid estinmtion of a.rsenie in red copper.--By etching the polished metal with pure nitric acid at 22 ° C. for five or six secor~ds, black spots are developed, the number of which, it is stated, bears a direct relation to the arsenic content of the metal. By comparing the metal under examination with a prepared scale of standard specimens o,f known arsenic content the percentage of arsenic present may be estimated to within about