Detection limit in theory and practice

as is the case with measurement methods for determining activity in water, detection limit values are required or indicated, misunderstandings can only be avoided by coming to prior agreement as to the meaning 

DIN 23482, Part 1 (1983) stipulates that a strict distinction must 

The detection limit defined by the DIN standard is the characteristic value of a measurement process which decides whether the measurement process satisfies a specific requirement, such as the detection of 0.1 Bq/1. 

On the other hand, the second characteristic value, called the recognition limit , is used to decide the value above which the measured pulse rate for a given individual measurement differs significantly from the background rate, i.e. it is used to decide whether the measurement sample is making a contribution or not. 

The reliability of the statement, i.e. the statistical error probability, must of course also be indicated in both cases. The detection limit of a method defined in this manner can be calculated in accordance with the approximate formula 

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