Carbon-14 Assay After Parr Peroxide Bomb Fusion

1970 ◽  
Vol 53 (1) ◽  
pp. 86-88
Author(s):  
Leonard A. Ford
Keyword(s):  
Carbon Dioxide ◽  
Sodium Carbonate ◽  
Liquid Scintillation Counting ◽  
Liquid Scintillation ◽  
Scintillation Counting ◽  
Organic Base ◽  
Scintillation Cocktail ◽  
Carbon 14 ◽  
Liquid Scintillation Cocktail ◽  
Fused Salt

Abstract A method has been developed for converting organic 14C compounds to 14C carbon dioxide and subsequent quantitation by liquid scintillation counting. The sample is converted to sodium carbonate in a Parr bomb. Carbon dioxide is liberated from the fused salt, absorbed in an organic base, and incorporated in a liquid scintillation “cocktail” for radioassay. Some advantages over existing methods in current use are given.

scholarly journals Large-Volume Liquid Scintillation Counting of Carbon-14

Radiocarbon ◽  
1980 ◽  
Vol 22 (2) ◽  
pp. 417-427 ◽  
Author(s):  
Lorenz Eichinger ◽  
Werner Rauert ◽  
Josef Salvamoser ◽  
Manfred Wolf
Keyword(s):  
Detection Limit ◽  
Liquid Scintillation Counting ◽  
Liquid Scintillation ◽  
Scintillation Counting ◽  
Measuring Chamber ◽  
Carbon 14 ◽  
Experimental Detection ◽  
Scintillation Solution ◽  
Special Measuring ◽  
Experimental Detection Limit

Efforts have been undertaken to further improve the relatively simple technique of low-level liquid scintillation counting of 14C. Two different approaches have been made. By synthesizing more benzene for 14C measurement than usual (with up to 19.5g of carbon) an experimental detection limit of about 0.1 percent modern has been achieved (97.5% confidence level, 1000 min). Absorption of CO2 with up to 5.3g of carbon in 160ml of an absorbent-scintillation solution and counting in a special measuring chamber resulted in an experimental detection limit of about 1 percent modern, with the sample preparation taking only 1 hour. The detection limits achieved by the two techniques correspond to 14C ages of about 55,000 and 35,000 years BP, respectively.

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