平行样品编号 | 元素 | |||
钾 | 钠 | 铁 | ||
测定结果(mg/L) | 1 | 0.336 | 0.171 | 0.334 |
2 | 0.328 | 0.168 | 0.333 | |
3 | 0.334 | 0.167 | 0.338 | |
4 | 0.335 | 0.167 | 0.352 | |
5 | 0.326 | 0.168 | 0.344 | |
6 | 0.330 | 0.167 | 0.334 | |
7 | 0.331 | 0.165 | 0.336 | |
平均值 (mg/L) | 0.33 | 0.17 | 0.34 | |
标准偏差s (mg/L) | 0.004 | 0.002 | 0.007 | |
t值 | 3.143 | 3.143 | 3.143 | |
检出限(mg/L) | 0.02 | 0.01 | 0.03 | |
测定下限(mg/L) | 0.08 | 0.04 | 0.12 |