ISOTOPE-DILUTION MEASUREMENT OF INORGANIC CHROMIUM(III) AND TOTAL CHROMIUM IN SEAWATER
ISOTOPE-DILUTION MEASUREMENT OF INORGANIC CHROMIUM(III) AND TOTAL CHROMIUM IN SEAWATER
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DOI：
10.1016/0304-4203(84)90030-6
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发表时间：
1984-01-01
期刊：
影响因子：
3
通讯作者：
MINSTER, JF
中科院分区：
文献类型：
--
作者：
JEANDEL, C;MINSTER, JF
建立了一种重现性好、低空白、同位素稀释法测定海水中无机铬(III)和总溶解铬。对法国布列塔尼沿岸水的分析证实，无机铬(III)的存在超过了Elderfield(1970)模型计算的热力学平衡值。总铬在13度处的垂直剖面。东太平洋海隆上的氮证实了铬行为的一般特征：表层轻微亏损(铬=2.0nmoL L-1，而1000m以下为2.6nmolL-1)，底部过剩，可能是由于沉积物释放铬(III)(高达15.8nmoL L-1)。在热水中最大富集量为海水平均值的6倍。金属沉积物中铬的含量主要来自于水柱中的清扫作用；通过热液作用进入海洋的铬可以忽略不计。
A reproducible, low-blank, isotope-dilution technique for the determination of inorganic Cr(III) and total dissolved Cr in sea water was developed. Analysis of coastal water from Brittany, France, confirms that inorganic Cr(III) exists in excess of the thermodynamic equilibrium value calculated from the model of Elderfield (1970). A vertical profile of total Cr at 13.degree. N on the East Pacific Rise confirms the general features of Cr behavior: slight depletion at the surface (Cr = 2.0 nmol l-1 compared to 2.6 nmol l-1 below 1000m) and bottom excess possibly due to Cr(III) release from sediments (up to 15.8 nmol l-1). A maximum enrichment of 6 times the average sea-water value is obtained in hydrothermal waters. The Cr content of metalliferous sediments is due mainly to scavenging from the water column; input of Cr into the ocean through hydrothermalism is negligible.