Chinese Journal of Magnetic Resonance ›› 2022, Vol. 39 ›› Issue (2): 230-242.doi: 10.11938/cjmr20212944
• Review Articles & Perspectives • Previous Articles
Lei CHEN*(),Hong-bing LIU,Hui-li LIU
Received:
2021-09-02
Online:
2022-06-05
Published:
2021-11-01
Contact:
Lei CHEN
E-mail:chenlei@apm.ac.cn
CLC Number:
Lei CHEN,Hong-bing LIU,Hui-li LIU. Comparison of Different Approaches for Estimation of the Detection Limit of Quantitative NMR[J]. Chinese Journal of Magnetic Resonance, 2022, 39(2): 230-242.
Table 1
Regression parameters and limits of detection calculated by different equations with various numbers of scans by calibration curve approach
16 | 32 | 48 | 64 | 96 | 128 | |
a | 1.0083 | 1.9491 | 3.0226 | 4.0361 | 6.1182 | 8.2802 |
b | 0.0353 | 0.0708 | 0.1057 | 0.1410 | 0.2110 | 0.2799 |
R2 | 0.9944 | 0.9959 | 0.9971 | 0.9979 | 0.9982 | 0.9985 |
Sy/x | 0.2000 | 0.3450 | 0.4298 | 0.4906 | 0.6853 | 0.8204 |
XC/(μmol/L) | 12.0 | 10.3 | 8.6 | 7.4 | 6.9 | 6.2 |
XD(2)/(μmol/L)* | 23.6 | 20.3 | 17.0 | 14.6 | 13.6 | 12.3 |
XD(3)/(μmol/L)* | 23.4 | 20.1 | 16.8 | 14.4 | 13.4 | 12.1 |
XD(4)/(μmol/L)* | 24.0 | 20.7 | 17.3 | 14.8 | 13.8 | 12.4 |
XD(5)/(μmol/L)* | 23.7 | 20.5 | 17.1 | 14.7 | 13.7 | 12.4 |
XD(6)/(μmol/L)* | 23.8 | 20.5 | 17.1 | 14.7 | 13.7 | 12.4 |
Table 3
Fitting parameters and limits of detection calculated by the signal-to-noise ratio regression method with different numbers of scan
16 | 32 | 48 | 64 | 96 | 128 | |
34.0846 | 50.1219 | 58.5726 | 63.4292 | 70.8545 | 89.1259 | |
1.0401 | 1.5872 | 2.0016 | 2.3365 | 2.9585 | 3.3478 | |
R2 | 0.9949 | 0.9953 | 0.9956 | 0.9961 | 0.9963 | 0.9964 |
5.6671 | 8.2389 | 10.1284 | 11.1132 | 13.5773 | 15.2679 | |
XD/(μmol/L) | 16.3 | 15.6 | 15.2 | 14.3 | 13.8 | 13.7 |
Table 4
Limits of detection determined with different approaches
方法 | 计算公式 | 检出限/(μmol/L) |
校准曲线法 | 14.4 | |
校准方程参数法 | 10.4 | |
数学模型法 | 14.1 | |
信噪比回归曲线法 | 14.3 | |
EPA法 | 6.2 |
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