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However, calling it a limit of detection is not a correct use of terminology.  LOD is an instrumental terminology, it does not refer to samples.  I think you should probably find another way to explain it.

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£¨ICH Q2£¨R1£©£º6.3        Based on the Standard Deviation of the Response and the Slope
The detection limit (DL) may be expressed as:
DL =        3.3 ¦Ò/S
where        ¦Ò = the standard deviation of the response
                S = the slope of the calibration curve
The slope S may be estimated from the calibration curve of the analyte. The estimate of ¦Ò may be carried out in a variety of ways, for example:
6.3.1        Based on the Standard Deviation of the Blank
Measurement of the magnitude of analytical background response is performed by analyzing an appropriate number of blank samples and calculating the standard deviation of these responses.
6.3.2        Based on the Calibration Curve
A specific calibration curve should be studied using samples containing an analyte in the range of DL. The residual standard deviation of a regression line or the standard deviation of y-intercepts of regression lines may be used as the standard deviation.
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2Â¥: Originally posted by klicking at 2014-10-16 09:28:23
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£¨ICH Q2£¨R1£©£º6.3        Based on the Standard Deviation of the Response and the Slope
The detection limit (DL) may ...

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