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首页> 外文期刊>Química Nova >Determina??o da composi??o isotópica de estr?ncio em águas naturais: exemplos de sua aplica??o em águas subsuperficiais da zona costeira na regi?o Bragantina-PA
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Determina??o da composi??o isotópica de estr?ncio em águas naturais: exemplos de sua aplica??o em águas subsuperficiais da zona costeira na regi?o Bragantina-PA

机译:天然水中锶同位素组成的测定:在Bragantina-PA地区沿海地区地下水中的应用实例

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Analytical procedures used for determining the concentrations and isotope composition of strontium in subsurface waters, by mass spectrometry, are described. Sampling was performed in coastal plateaus, salt marsh and mangrove environments in the coastal region of Pará. Coastal plateau waters have delta87Sr between 1.51 and 6.26‰ and Sr concentration bellow 58 ppb. Salt marsh waters show delta87Sr between 0.55 and 0.90‰ and Sr concentration between 93 and 114 ppm, while mangrove waters have delta87Sr‰ around zero and Sr concentration above 15 ppm. Differences in the 87Sr/86Sr ratio in these subsurface waters are detected, as well as seasonal variations in the coastal pleteau waters.
机译:描述了用于通过质谱法确定地下水中锶的浓度和同位素组成的分析程序。在帕拉沿海地区的沿海高原,盐沼和红树林环境中进行采样。沿海高原水域的Delta87Sr在1.51至6.26‰之间,Sr浓度在58 ppb以下。盐沼水的delta87Sr在0.55至0.90‰之间,Sr浓度在93至114 ppm之间,而红树林水的delta87Sr‰在零附近,Sr浓度在15 ppm以上。在这些地下水域中,检测到87Sr / 86Sr比率的差异,以及在沿海pleteau水域中发现了季节性变化。

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