Abstract
The use of hydroxide compound s as CO 2 absorbents for Measurement of Carbon-14 in Coral Reef Sample from Spermonde Archipelago. This research aimed to determine the age of coral reef sample of Spermonde Archipelago by measuring the activity of carbon-14 using the method Liquid Scintillation Counting (LSC). The coral reef sample was collected in Langkai Island. The research was conducted by following steps of sample preparation, the CO 2 absorption using the hydroxide solutions (KOH and NaOH). The measurement of the carbon-14 activities was performed using the Liquid Scintillation Counter (LSC) Hidex 300 SL. The research results indicated that the absorption capacities of KOH and NaOH were 0,450 and 0,425 mol CO 2 /mol hydroxide respectively. The specific activity of coral reef sample using absorbent KOH and NaOH w ere 14.51; and 14.57 DPM / g C , respectively . The age of coral reef sample, which was calculated based on t he specific activity values using the absorbents KOH and NaOH w ere 436.13; and 403.61 year s, respectively.
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