Xác định 129I trong thực vật bằng phương pháp tách chiết kiềm kết hợp với đo lường AMS và biến thiên của đồng vị iodine trong thực vật tại núi Qinling

Journal of Radioanalytical and Nuclear Chemistry - Tập 326 - Trang 1457-1466 - 2020
Yanyun Wang1,2, Xiaolin Hou1,3,4,5, Yukun Fan1, Luyuan Zhang1,4,5, Qi Liu1
1Xi’an AMS Center, SKLLQG, Shaanxi Key Laboratory of AMS Technology and Application, Xi’an AMS Center, Institute of Earth Environment, CAS, Xi’an, China
2University of Chinese Academy of Sciences, Beijing, China
3Department of Environment Engineering, Technical University of Denmark, Roskilde, Denmark
4CAS Center of Excellence in Quaternary Science and Global Change, Xi’an, China
5Open Studio for Oceanic-Continental Climate and Environment Changes, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, China

Tóm tắt

Một phương pháp phân tích đã được phát triển để xác định 129I và 127I trong mẫu thực vật. I-ốt trong mẫu được tách bằng phương pháp nung ẩm kiềm, tiếp theo là leaching bằng nước và chiết xuất dung môi. Có thể phân tích tới 20 mẫu mỗi mẻ và hơn 20 g cho mỗi mẫu. Giới hạn phát hiện đạt được là 3,0×10−17 g/g cho 129I. Các mẫu cỏ được thu thập từ Tây An và các khu vực trong dãy núi Qinling với khoảng cách 20–120 km so với thành phố Tây An đã được phân tích thành công nhằm điều tra tác động của khoảng cách lấy mẫu tới thành phố đối với mức độ 127I và 129I.

Từ khóa

#129I #127I #thực vật #tách chiết kiềm #đo lường AMS #đồng vị iodine #núi Qinling

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