基于大数据的中国土壤背景值与基准值及其变化特征研究——写在《中国土壤地球化学参数》出版之际

奚小环, 侯青叶, 杨忠芳, 叶家瑜, 余涛, 夏学齐, 成杭新, 周国华, 姚岚

Big data based studies of the variation features of Chinese soil’s background value versus reference value: A paper written on the occasion of Soil Geochemical Parameters of China’s publication

XI Xiao-Huan, HOU Qing-Ye, YANG Zhong-Fang, YE Jia-Yu, YU Tao, XIA Xue-Qi, CHENG Hang-Xin, ZHOU Guo-Hua, YAO Lan

表3 分析方法的准确度、精密度要求

Table 3 Accuracy and precision requirements of the analytical method

含量范围	准确度	精密度
含量范围	$\overline {ΔlgC}$(GBW)=\|lg ${\bar{C}}_{i}$ -lgC_s\|	RSD%(GBW)= $\frac{\sqrt[]{\frac{\overset{i}{\sum_{i = 1}} (C_{i} - C_{s})^{2}}{n - 1}}}{C_{s}} \times 100$
检出限3倍以内	≤0.1	17
检出限3倍以上	≤0.05	10
>1%	≤0.04	8