背景浓度 meaning in English

background concentration solution

Analysis of boron background concentration and pollution status of water in kuandian county
宽甸县水中硼的背景浓度及污染现状分析
This method is of significance both to overcome the difficulties in the recovery of the historical tritium concentration and to enhance the accuracy of age - dating
该方法不仅可以很好地解决地下水系统输入项氚背景浓度恢复时间序列较长的问题，而且对于提高地下水的定年精度具有十分重要的意义。
In order to overcome difficulties in the recovery of historical tritium concentration in the determination of shallow groundwater age by the method of mathematical physical model , this paper , just taking the expolatianal model as the example , deduces a new formula to calculate the groundwater age based on the equation of the tritium mathematical physical and the tritium analysis results in different times
摘要为克服应用氚同位素方法确定现代地下水年龄过程中存在的，需确定地下水系统输入项的历史背景浓度问题，本文根据地下水同位素数学物理方程，以全混模型为例，利用不同时期地下水同位素的测试结果，通过数学迭代运算，推导出计算现代地下水年龄的计算公式。