A simplified method for obtaining high-purity perchlorate from groundwater for isotope analyses.

vonKiparski, G. ; Hillegonds, D.

Lawrence Livermore National Laboratory

关键词: Detection;    Origin;    37 Inorganic, Organic, Physical And Analytical Chemistry;    Sampling;    58 Geosciences;   

DOI  :  10.2172/1022876
RP-ID  :  LLNL-TR-479291
RP-ID  :  W-7405-ENG-48
RP-ID  :  1022876

美国|英语

来源: UNT Digital Library

【 摘 要 】

Investigations into the occurrence and origin of perchlorate (ClO{sub 4}{sup -}) found in groundwater from across North America have been sparse until recent years, and there is mounting evidence that natural formation mechanisms are important. New opportunities for identifying groundwater perchlorate and its origin have arisen with the utilization of improved detection methods and sampling techniques. Additionally, application of the forensic potential of isotopic measurements has begun to elucidate sources, potential formation mechanisms and natural attenuation processes. Procedures developed appear to be amenable to enable high precision stable isotopic analyses, as well as lower precision AMS analyses of {sup 36}Cl. Immediate work is in analyzing perchlorate isotope standards and developing full analytical accuracy and uncertainty expectations. Field samples have also been collected, and will be analyzed when final qa/qc samples are deemed acceptable.