An intercalibration for trace metals in seawater
An intercalibration for trace metals in seawater
复制标题
海水中痕量金属的相互校准
DOI：
10.1016/0304-4203(81)90040-2
复制
发表时间：
1981
期刊：
影响因子：
3
通讯作者：
J. L. Barron
中科院分区：
文献类型：
--
作者：
J. M. Bewers;J. Dalziel;P. Yeats;J. L. Barron
本文介绍了最近一次国际间海水中痕量金属相互校准实验的结果。结果表明，对几种浓度接近近海海水中发现的金属的分析能力有了相当大的提高。对大多数金属来说，冰冻样品和酸化样品的分析结果之间的一些系统差异是显而易见的。两种不同的分析技术，原子吸收分光光度法和阳极溶出伏安法的应用，似乎在接近自然浓度的铜和镉的结果中引入了相对较小的差异。限制我们在深海中发现的微量金属水平上进行相互校准的能力的两个因素是可容忍的污染程度，特别是锌和铅的污染程度，以及一组相互校准样品的总体均匀性可以保证的程度。在有效地进行这种低水平校准之前，需要对样品制备方法进行一些复查。
This paper describes the results of a recent international intercalibration experiment for trace metals in seawater. The results show that considerable improvements in analytical ability have been made for several metals at concentrations close to those found in offshore marine waters. Some systematic differences between the results of analyses of frozen and acidified samples are evident for most metals. The application of two different analytical techniques, atomic absorption spectrophotometry and anodic stripping voltammetry, appears to introduce relatively small differences in the results for copper and cadmium at near-natural concentrations.Two factors limiting our ability to conduct trace metal intercalibrations at the levels found in the deep ocean are the extent of tolerable contamination, especially for zinc and lead, and the degree to which the overall homogeneity of a group of intercalibration samples can be assured. Some reexamination of methods of sample preparation needs to be carried out before such low level calibrations can be effectively conducted.