定量NMR中多种检出限评估方法的比较

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定量NMR中多种检出限评估方法的比较

陈雷,刘红兵,刘惠丽

Comparison of Different Approaches for Estimation of the Detection Limit of Quantitative NMR

Lei CHEN,Hong-bing LIU,Hui-li LIU

表4 不同评估方法计算得到的检出限

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	${X_D} = \frac{{\delta (\nu , \alpha , \beta ) \cdot {S_{y/x}}}}{b} \cdot \sqrt {1 + \frac{1}{{I \times J}} + \frac{{{{\bar x}^2}}}{{J\sum\nolimits_{i = 1}^I {{{({x_i} - \bar x)}^2}} }}}$	14.4
校准方程参数法	${X_D} = 3{S_{y/x}}/b$	10.4
数学模型法	${X_D} = ({k_1} + {k_2}) \cdot \bar s/b$	14.1
信噪比回归曲线法	${X_D} = 3{S_{y/x - SN}}/{b_{SN}}$	14.3
EPA法	${X_D} = {t_{(1 - \alpha , {v_1} + {v_2})}}{S_{{\rm{pooled}}}}$	6.2