For most natural water, a large sample is required to provide the 3 grams of carbon needed for a carbon-14 determination. A field procedure for isolating total dissolved-carbonate species is described. Carbon dioxide gas is evolved by adding sulfuric acid to the water sample; the gas is then collected in a sodium hydroxide trap by recycling in a closed system. The trap is then transported to the dating laboratory where the carbon-14 is counted.
|Title||Preparation of water samples for carbon-14 dating|
|Authors||H.R. Feltz, Bruce B. Hanshaw|
|Publication Subtype||USGS Numbered Series|
|Record Source||USGS Publications Warehouse|