Determination 13C/12C and 18O/16O Isotope Ratios with Mass Spectrometer in Turkish White Marbles

摘要

13C/12C and 18O/16O isotope ratios of marble samples taken from different region of Turkey such as Afyon (27 samples), Marmara (24 samples) and U??ak (16 samples) have been studied. The marble reserve in the other cities of Turkey is high, so 13C/12C and 18O/16O isotope ratios of these samples were determined by mass spectrometer. In order to rationalize the result both marbles were not only compared to themselves but also compared with Afyon, Marmara and U??ak samples to reach the conclusion that marbles of their regions could be classified. Using a vacuum extraction line, carbon dioxide prepared by dissolving the marble samples in 105% orthophosphoric acid was purified and subsequently collected in a glass tube for later isotopic analysis. The relative abundance of the 13C and 18O isotopes was determined with a high precision mass spectrometer. The 13C/12C and 18O/16O ratios were measured relative to the ratios in a secondary standard.