title: Extension of Fong and Alvarez: when is a lower limit of detection low enough?
abstract: The work of Fong and Alvarez is easily extended for counting when paired counting is not employed. It remains true in the general case that the precision of a counting method can be no less than about 30% at the LLD and so it is desirable to have decision levels at least several times larger than the LLD so that measurements have sufficient precision to make valid decisions.
authors.affiliation: PsPr189729@aol.com
authors.forename: W E
authors.initials: WE
authors.lastname: Potter
mesh_terms: D004784:Environmental Monitoring / Q000379:methods / Q000592:standards; D011834:Radiation Monitoring / Q000379:methods* / Q000592:standards*; D012680:Sensitivity and Specificity