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4 日常分析准确度、精密度要求

Table 4 Accuracy and precision requirements of routine analysis

含量范围	准确度	精密度
含量范围	$\overline {ΔlgC}$(GBW)=\|lg ${\bar{C}}_{i}$ -lgC_s\|	λ= $\sqrt[]{\frac{\overset{n}{\sum_{i = 1}} (\lg C_{i} - \lg C_{s})^{2}}{4 - 1}}$
检出限3倍以内	≤0.12	0.17
检出限3倍以上	≤0.10	0.15
1~5%	≤0.07	0.10
>5%	≤0.05	0.08