Citation: LI Jing-Xi, ZHENG Li, SUN Cheng-Jun, JIANG Feng-Hua, YIN Xiao-Fei, CHEN Jun-Hui, HAN Bin, WANG Xiao-Ru. Study on Ecological and Chemical Characteristics of Rare Earth Elements in Tropical Marine Organisms[J]. Chinese Journal of Analytical Chemistry, ;2016, 44(10): 1539-1546. doi: 10.11895/j.issn.0253-3820.160285 shu

Study on Ecological and Chemical Characteristics of Rare Earth Elements in Tropical Marine Organisms

1.
Marine Ecology Research Center, First Institute of Oceanography of State Oceanic Administration, Qingdao 266061, China;
2.
Laboratory of Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China

Received Date: 10 April 2016
Revised Date: 12 July 2016

Figures(1)

A total of 30 kinds of fish samples, 5 kinds of shellfish samples and 4 kinds of crustacean samples from the Nansha sea area of china were digested by microwave digestion system with HNO₃-H₂O₂ as the digestion reagent. Then the contents (ICP-MS determination) and ecological chemical characteristics of rare earth elements (REE) were studied. The results showed that the method of microwave digestion-ICP-MS for the determination of rare earth elements was perfect, and the linear relationship for each element was good with r≥0.9997. The detection limit of the method could reach 1.0 ng/L with the relative standard deviation (RSD, n=3) of less than 5.0%. The recoveries of rare earth elements were between 91.50% and 106.67%. The total amount of rare earth in fish samples, shellfish samples and crustacean samples were 5.02-34.8 μg/kg, 30.4-1481 μg/kg and 103-863 μg/kg, respectively. The average enrichment contents of the rare earth in the 3 species was crustacean > shellfish > fish. The contents of 14 rare earth elements in fish/shellfish/crustaceans showed significantly positive correlation (r>0.80). The contents of light rare earth elements (La-Eu) were higher than that of heavy rare earth elements (Gd-Lu). The light and heavy rare earth elements had obvious fractionation, and the REE distribution pattern was consistent in fish/shellfish/crustacean with Gd negative anomaly. The δEu values had negative anomalies, similar to the δEu values in corresponding area sediment, and δCe values showed positive anomalies, which showed that Ce had different process of oxidation and reduction in the organism and sediment deposition. At the same time, the enrichment relationship of rare earth elements in sediment and organism was also studied. In this study, the content and distribution of rare earth elements in the tropical marine fish/shellfish/shellfish were analyzed, which could provide basic data for the study of the level and migration and accumulation of rare earth elements in the environment of the South China Sea.
- Tropical organisms,
- Rare earth element,
- Rare earth distribution pattern,
- Inductively coupled plasma-mass spectrometry
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沈阳化工大学材料科学与工程学院沈阳 110142