1. Scope 1.1 This Standard Practice is intended to be used to estimate the detection limit (DL) of a well behaved measurement method or process in air quality measurements. It uses the magnitude and the variance of the background signal and all other systematic and random errors of that method at the background signal level to determine the minimum amount of an analyte that can be detected above the background, the detection limit (DL). The practice will yield a DL with a statistically determined probability of false positive and false negative results and a probability of reproducing that DL in future measurements. 1.2 This Standard Practice is applicable to analytical methods that generate consistent results when samples at and just above background are measured. 1.3 A well behaved analytical method, for the purposes of this standard practice will be a method that has been proven in past large studies to yield data that are normal in population, consistent over time and in full statistical control. 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
KeywordsDetection Limit; Quantification Limit; Statistical Evaluation; Probability Estimate
There are numerous, non-standard practices for calculating detection limit. This item will provide a standard practice for use in air quality test methods.
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top
Draft Under Development