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a854882381金蟲 (小有名氣)
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[求助]
橫坐標為對數(shù)檢出限的計算,three times standard deviation 單位是什么
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| 橫坐標為對數(shù)檢出限的計算,three times standard deviation 單位是什么 |

金蟲 (小有名氣)

捐助貴賓 (正式寫手)
| 遇到與樓主相同的問題,我還沒有答案。我把我查到的文獻和樓主分享一下,在文獻AC,1980,52,2242-2249一文中,“The LOD is based on the relationship between the gross analyte signal St, the field blank Sb, and the variability in the field blank σb. The limit of detection was defined by the extent to which the gross signal exceeds Sb. St-Sb=Kσ. Where, K was used as 3.” 樓主所說的three times standard deviation,以我的理解,單位應(yīng)該是所儀器檢測所得信號的單位,不知道我的理解對不,希望更多人來討論并能給指點迷津。 |
捐助貴賓 (正式寫手)
銀蟲 (小有名氣)
捐助貴賓 (正式寫手)
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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是下標,就是用濃度表示的檢出限) 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. |
捐助貴賓 (正式寫手)
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