横坐标为对数检出限的计算，three times standard deviation 单位是什么？ 你好，你说的这篇文献我也看到了，我想请教一下，st应该就是我们所要求的检测限，那sb是什么？应该怎么算sb？希望能得到你的回复，谢谢！... the lod is based on the relationship between the gross analyte signal st, the field blank sb, and the variability in the field blank σ. the limit of detection was defined by the extent to which the gross signal exceeds sb. st-sb = kσ. the corresponding limit of detection expressed in concentration units is derived from the calibration function. the content at the limit of detection (cd, d是下标，就是用浓度表示的检出限) followed from the analytical function, cd= (st-sb)/s = kσ/s, where σ was the standard deviation of the blank solution, s was the slope of regression line, k was used as 3， 查看更多
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