DISTINCTION BETWEEN ORGANIC AND INORGANIC CARBON IN CALCIUM-CARBONATE MATERIAL BY SECONDARY ION MASS SPECTROSCOPY (SIMS)

  • 1 January 1979
    • journal article
    • research article
    • Vol. 289  (4) , 433-+
Abstract
The emission differences of secondary ions at masses 12 (C+ and C-), 24 .**GRAPHIC**. and 26 .**GRAPHIC**. or CN-) of organic material and CaCO3 of semi-thin sections of quail egg shell allow the distinction between organic and inorganic carbon on images obtained with secondary ion mass spectroscopy. The emission differences do not correspond only to the difference of concentration but to the difference of ionic yield. The emission at mass 26 .**GRAPHIC**. or CN-) is higher than that obtained at mass 24 .**GRAPHIC**. in glycoproteinic material (rich in N) and lower in the embedding material (Araldite, poor in N). The ion present at mass 26 could be CN- rather than .**GRAPHIC**.

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