| Observed spectral line | Possible element | Description |
|---|---|---|
| 445 | ||
| 495 nm | ||
| 513 nm | ||
| 523 nm | ||
| 445 | ||
| 551 | ||
| 587 nm | Na | Sodium dublet 588.9 an 589.5nm |
| 600 | ||
| 616 | ||
| 630 |
After plotting all spectra in a single graph, a significant and common peak at a wavelength of 587 nm is observed. According to the NIST spectral database, sodium has a very prominent doublet of emission lines at 588.9 and 589.5 nm, which corresponds quite accurately with the detected wavelength.
Copper is used to color fireworks in blue and purple hues. It has significant emission at wavelengths around 515 nm for blue and violet colors.
Spectral strips are taken from http://umop.net/spectra/spectrum.php.