Speciation analysis of 129 I in seawater using coprecipitation and accelerator mass spectrometry and its applications

• Published in: Journal of Radioanalytical and Nuclear Chemistry
• Main Authors: Xing, Shan, Hou, Xiaolin, Aldahan, Ala, Possnert, Göran
• Format: Article in Journal/Newspaper
• Language: English
• Published: 2017
• Subjects: 129I; Accelerator mass spectrometry; Seawater; Speciation analysis; Antarctic; The Antarctic; Antarc*
• Online Access: https://orbit.dtu.dk/en/publications/1b644d7d-2492-4324-acbe-2b9720a5dfb6; https://doi.org/10.1007/s10967-016-5060-6; https://backend.orbit.dtu.dk/ws/files/140018988/Post_print_129I_speciation_in_seawater_JRNC2017.pdf

Speciation analysis of long-lived 129 I in seawater can provide useful information on the source of water masses. This paper presents an improved method for speciation analysis of 129 I based on coprecipitation of iodide as AgI with Ag 2 SO 3 and AgCl. By adding a small amount of 127 I carrier, the separation efficiency of iodine species and the accuracy and precision of 129 I measurement are remarkably improved. 129 I species in depth profiles of seawater from the Antarctic were analyzed for investigation of water circulation in the Antarctic.