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。
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。
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.
介绍了用吸附溶出伏安法测定火力发电机组锅炉用水中微量铁质量浓度的原理和试验方法，并对多组试验数据进行了分析和讨论，从而得出测试参数的最佳选取值。
The trace selenium in wild almond was determined by AFS, the effect of the acidity and the concentration of the reducing agent were studied.
用原子荧光光谱法测定野生杏仁中的微量硒，对酸度、还原剂浓度等条件进行了试验。
Support, delivery and compositive distillation technique was first used to complete the extraction, separation and concentration of trace components.
探索一种新型的样品前处理装置，首次运用载体、携带体和综合蒸馏技术完成了待测样品中微量成分的提取分离和富集。
The latest progress of trace gas concentration detection technology is reviewed.
综述了近些年来国内外痕量气体浓度检测技术研究的最新进展。
Conclusion the toxicity of lead on neuron development might related to the change of trace element concentration, reduction of antioxidation ability and increasing apoptosis in brain.
结论铅的发育神经毒性与中枢神经系统铜等微量元素的改变、抗氧化能力下降及由此所致的细胞凋亡数量增加有关。
The efficiency of concentration and recovery of trace phenols from water using H and NKA resins was measured. Some factors which effect the efficiency were studied.
测定了H树脂和NKA树脂对水中微量酚的富集回收率，研究了影响回收率的各种因素。
Feed premix and the high concentration of trace elements in the presence of probiotics will also caused varying degrees of damage.
而且饲料预混料中的各种高浓度微量元素的存在，同样会对益生菌造成不同程度的伤害。
The contrastable optical ring-down cavity micro-gas cell is designed for the trace gases concentration measurement used ring-down cavity method.
在采用光腔衰荡技术实现痕量气体浓度测量时，设计了用于痕量气体浓度测量的比较式光腔衰荡气室。
An improvement on the method is made by using concentrated water sample in order to increase the concentration of trace elements in the samples.
该文对这一方法进行了改进，采用浓缩水样以提高待测元素的含量，并加入二氯化钙作为释放剂来消除硅的干扰。
A method for the spectrophotometric determination of trace Cu 2+ with flow injection liquid liquid extraction separation and pre concentration was developed.
用自制的分相器与流动注射仪联用，对有机相析出液- 液萃取光度法测定微量铜的流路参数和操作程序进行优化。
A method for the spectrophotometric determination of trace Cu 2+ with flow injection liquid liquid extraction separation and pre concentration was developed.
用自制的分相器与流动注射仪联用，对有机相析出液- 液萃取光度法测定微量铜的流路参数和操作程序进行优化。
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