Acta Optica Sinica, Volume. 29, Issue 6, 1706(2009)

Application of Spectroscopy in Identification of Golden Saltwater Pearl

Chen Yu*, Guo Shouguo, and Shi Lingyun
Author Affiliations
  • [in Chinese]
  • show less

    In order to identify and distinguish golden saltwater pearls and color-treated golden pearls, Raman spectrum and UV-visible absorption spectrum were used for testing and analyzing. The results show that in Raman spectrum, compared with color-treated one which has more miscellaneous peaks and higher fluorescence background, peaks are found more stable and less miscellaneous in golden saltwater pearls with a much lower fluorescence background. Between 0~1000 cm-1, the base lines of golden saltwater pearls are below 1000, but for color-treated golden pearls, they are higher than 2000. The intensity of 275 cm-1 Raman band in golden saltwater pearls is more stronger than that of the color-treated one, where it has been covered by the fluorescence background; In the near ultraviolet region (200 nm~400 nm) of UV-visible absorption spectrum, characteristic absorption peaks of 284 nm and 357 nm were found in golden saltwater pearls. But those characteristic absorption peaks in spectrums of color-treated golden pearls are missing, wihich are either red shifted (408 nm) or disappeared. According to the differences of Raman and UV-visible spectrums between golden saltwater pearls and color-treated golden pearls, they can be quickly and effectively set apart without any damage.

    Tools

    Get Citation

    Copy Citation Text

    Chen Yu, Guo Shouguo, Shi Lingyun. Application of Spectroscopy in Identification of Golden Saltwater Pearl[J]. Acta Optica Sinica, 2009, 29(6): 1706

    Download Citation

    EndNote(RIS)BibTexPlain Text
    Save article for my favorites
    Paper Information

    Category: Spectroscopy

    Received: Sep. 10, 2008

    Accepted: --

    Published Online: Jun. 8, 2009

    The Author Email: Yu Chen (cherry19831111@hotmail.com)

    DOI:

    Topics