Differences in the concentration of trace elements are related to the climatic conditions and land use of the area.
不同地区地下水的微量元素浓度差异与气候状况、土地利用程度密切相关。
2
Based on correlation coefficients and principal component analysis, fe and al were selected as the concentration normalizer for the different trace metals.
由相关系数和主成份分析，选择铁和铝作为沉积物中痕量金属浓度的均一化元素。
3
The principle and test method of using adsorptive stripping voltammetry to determine the mass concentration of trace iron in boiler water of thermal power generating units are described in this paper.