This table of flame coloration is modified from the book "Determinative
Mineralogy and Blowpipe Analysis" by Brush & Penfield, 1906. The colors are best
observed by heating the sample on a loop of platinum wire moistened with
HCl. The spectra are calculated to represent the emission from a flame and are
based on the work of
John Talbot. Additional data for each element were obtained from the
National Institute of Standards and Technology.
The copper flame color is
dependent on the presence of halide (I, F, Br, or Cl). The color can be
used to detect halides by using copper oxide moistened with test
solution. The outer darts of the flame are tinged with emerald-green.