Determination of trace elements in otoliths of chum salmon Oncorhynchus keta by laser ablation-ICP-mass spectrometry
Determination of trace elements in otoliths of chum salmon Oncorhynchus keta by laser ablation-ICP-mass spectrometry
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DOI：
10.1111/j.1444-2906.2006.01246.x
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发表时间：
2006-10
影响因子：
1.9
通讯作者：
T. Arai;T. Hirata
中科院分区：
文献类型：
--
作者：
T. Arai;T. Hirata
采用激光烧蚀电感耦合等离子体质谱法（LA-ICPMS）研究了鲑耳石中微量元素的含量。电子探针（EPMA） x射线分析与LA-ICPMS分析在Sr/Ca比值上存在密切的线性关系，表明LA-ICPMS技术可用于区分海洋和淡水生命阶段。淡水生长带和海水生长带耳石中Mg、Zn、Ba和Sr的含量存在差异。淡水生长期Mg、Zn浓度显著高于海水生长期，Sr、Ba浓度显著低于海水生长期。每次烧蚀时Sr浓度与Mg、Zn、Ba浓度呈显著相关。这些结果表明，微量元素组成可能反映了淡水和海水环境条件的差异。
Trace element levels in the otoliths of chum salmon Oncorhynchus keta were examined by means of laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS). A close linear relationship in the Sr/Ca ratios between X-ray analysis with an electron microprobe (EPMA) and LA-ICPMS analysis was found, suggesting that the latter technique could be used to distinguish the marine and freshwater life phases. Mg, Zn, Ba and Sr concentrations of the otoliths differed between the freshwater and seawater growth zones. Mg and Zn concentrations in the freshwater growth zone were significantly higher than those in the seawater growth zone, while Sr and Ba concentration s in the former were significantly lower than in the latter. The relationship between Sr concentration and Mg, Zn, and Ba concentrations at each ablation showed significant correlations. These results suggest that trace element compositions may reflect differences between freshwater and seawater environmental conditions.