各位专家:
鄙人在进行GB11893-1989的总氮分析时,计算的数据如下,大家能给点意见吗?哪些地方做的不合理?
我本人能看出来的:
1. 空白不合理,但是质控样做的结果符合要求
2. sample2 df100的275nm的吸光度高了,不知道为什么。275nm的吸光度高了算是失败吗?
| A220 | A275 | |
10mg/L加入体积(ml)浓度 | TN量(μg) | WL220.0 | WL275.0 | Ab(=Ab220-2Ab275) | As(=As220-2Aa275) | Ar(=As-Ab) | |
0 | 0 | 0.0693 | 0.00708 | 0.0552 | |
0.2 | 2 | 0.09717 | 0.00818 | 0.0808 | 0.0256 | |
0.5 | 5 | 0.11279 | 0.00732 | 0.0982 | 0.0430 | |
1 | 10 | 0.18066 | 0.00842 | 0.1638 | 0.1086 | intercept | 0.0019 |
3 | 30 | 0.39331 | 0.00623 | 0.3809 | 0.3257 | Slope | 0.0105 |
7 | 70 | 0.80188 | 0.00830 | 0.7853 | 0.7301 | RSQ | 0.99927 |
| TN(μg) | TN(mg/L) |
| QC | 0.46509 | 0.00830 | 0.4485 | 0.3933 | 37.43 | 3.74 |
| sample df1000 | 0.11328 | 0.00903 | 0.0952 | 0.0400 | 3.65 | 365.1 |
| sample2 df1000 | 0.13171 | 0.02002 | 0.0917 | 0.0365 | 3.31 | 331.1 |
| sample2 df100 n=1 | 0.60522 | 0.19507 | 0.2151 | 0.1599 | 15.11 | 151.1 |
| sample2 df100 n=2 | 0.37061 | 0.10327 | 0.1641 | 0.1089 | 10.23 | 102.3 |
| |
| QC标准值: | 3.60±0.23 |
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