硒标液浓度,ng/mL | 0 | 1.0 | 2.0 | 4.0 | 8.0 | 10.0 |
荧光强度 | 125.1 | 317.6 | 524.1 | 940.2 | 1730.9 | 2190.6 |
线性方程 | y=116.0361+205.2913*x | |||||
相关系数 | R2=0.9996 |
12次样品空白荧光强度值IF | 156.0 | 160.2 | 136.9 | 143.2 |
150.3 | 157.2 | 155.7 | 158.7 | |
157.0 | 159.0 | 159.2 | 159.3 | |
标准偏差SD | 6.57133 | |||
硒检出限DL,ng/mL | 0.096 |
测定次数 | 1 | 2 | 3 | 4 | 5 | 6 | RSD% |
测定低限 | 0.1658 | 0.1719 | 0.1929 | 0.1746 | 0.1682 | 0.1723 | 5.5 |
常见限量 | 4.7478 | 4.8483 | 4.9043 | 4.8049 | 4.8596 | 4.9030 | 1.2 |
一合适点 | 5.4173 | 5.5732 | 5.6442 | 5.6257 | 5.6635 | 5.6931 | 1.8 |
样品编号 | 称样质量,g | 测试浓度,ng/mL | 计算结果,mg/kg | 平均值,mg/kg | RSD,% |
1# | 0.5032 | 2.2939 | 0.114 | 0.118 | 2.1 |
2# | 0.5069 | 2.3502 | 0.116 | ||
3# | 0.5011 | 2.3767 | 0.119 | ||
4# | 0.5004 | 2.3935 | 0.120 | ||
5# | 0.4967 | 2.4014 | 0.121 | ||
6# | 0.5134 | 2.3790 | 0.116 | ||
7# | 0.5055 | 2.3902 | 0.118 |
硒含量 | 原样,ng/mL | 加标样,ng/mL | 加标量,μL | 回收率,% |
酒样 | 5.8555 | 13.1510 | 75 | 97.3 |
18.6870 | 125 | 102.7 | ||
20.7800 | 150 | 99.5 |
样品 | 质量,g | 测试浓度ng/mL | 加标量μL | 计算值mg/kg | 含量ug | 回收率,% |
食堂大米 | 0.5113 | 0.6065 | - | 0.0297 | 0.0152 | - |
0.5134 | 1.3549 | 20 | 0.0660 | 0.0339 | 93.6 | |
0.5114 | 1.8764 | 30 | 0.0917 | 0.0469 | 105.8 | |
0.5137 | 2.4700 | 50 | 0.120 | 0.0618 | 93.2 |
样品 | 编号 | 质量,g | 定容体积,mL | 测试值,ng/mL | 换算值,mg/kg | 标示值,mg/kg |
蒜粉 | 1 | 0.4918 | 25 | 7.5197 | 0.382 | 0.39±0.07 |
2 | 0.5079 | 25 | 8.2668 | 0.407 | ||
辽宁大米 | 1 | 0.5054 | 25 | 0.8045 | 0.0398 | 0.040±0.013 |
2 | 0.4902 | 25 | 0.8030 | 0.0410 |