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This study aims to determine carbon-14 activity on coral from Barrang Caddi. Several stages of research were physical and chemical cleaning to eliminate contamination on coral. CO 2  absorption pre-treatment method, titration to determine total carbon absorbed in the process of absorption CO 2  and enumeration with LSC Hidex 300 SL to determine the optimum time of enumeration, the average value of activity  14 C and specific activities  14 C. In this study, marble from marble karst, Maros, was used as a background. The results show that the absorption capacity was 0.2188 mol CO 2 /mol OH, the absorption efficiency of 21.87%, total carbon mass was 0,168 gram, optimum counting time was 15 minutes, average activity  14 C was 433,597 DPM, enumeration efficiency was 0,567 and specific activity was 15.262 DPM/gC. It was concluded that coral in Barrang Caddi relatively new.

Analysis activity 14C of coral in Barrang Caddi Island, Spermonde Archipelago