平行样品编号 | 测定结果(mg/L) | 平均值(mg/L) | 标准偏差s (mg/L) | 相对标准偏差RSD (%) | |||||||
1 | 2 | 3 | 4 | 5 | 6 | ||||||
元素 | 钾 | 浓度1 | 1.494 | 1.498 | 1.502 | 1.503 | 1.506 | 1.51 | 1.5 | 0.006 | 0.38 |
浓度2 | 2.072 | 2.077 | 2.089 | 2.089 | 2.09 | 2.101 | 2.09 | 0.01 | 0.50 | ||
浓度3 | 2.886 | 2.864 | 2.866 | 2.862 | 2.857 | 2.884 | 2.87 | 0.012 | 0.42 | ||
钠 | 浓度1 | 0.251 | 0.246 | 0.246 | 0.25 | 0.249 | 0.248 | 0.25 | 0.002 | 0.82 | |
浓度2 | 0.939 | 0.948 | 0.945 | 0.93 | 0.956 | 0.939 | 0.94 | 0.009 | 0.93 | ||
浓度3 | 1.772 | 1.756 | 1.785 | 1.741 | 1.777 | 1.777 | 1.77 | 0.016 | 0.93 | ||
铁 | 浓度1 | 0.763 | 0.762 | 0.762 | 0.764 | 0.754 | 0.753 | 0.76 | 0.005 | 0.62 | |
浓度2 | 1.522 | 1.524 | 1.508 | 1.513 | 1.51 | 1.522 | 1.52 | 0.007 | 0.46 | ||
浓度3 | 4.868 | 4.838 | 4.784 | 4.822 | 4.776 | 4.776 | 4.81 | 0.038 | 0.79 |