In this series of articles, all of the regression discussions to date have assumed that the replicate preparations of a given concentration have been exact. read more

The previous article (Part 35, American Laboratory, Aug 2009) introduced the concept of significant digits, pointing out that a statistically sound treatment will: 1) result in a formula that depends ... read more

The subject of detection limits (DLs) is a controversial one, generating many questions and almost endless debate. read more

As was mentioned in the first article on detection limits (DLs) (Part 26, American Laboratory, June/July 2007), many formulas exist for calculating these values. read more

In Part 29 (American Laboratory, Feb 2008), Hubaux-Vos detection limits (H-V DLs) were explained and an illustration was given. read more

In the previous article (Part 27, American Laboratory, Sept 2007), the world of detection was shown to revolve around three variables: 1) the detection limit, 2) the probability of false positives, a,... read more

We believe that detection limits (DLs) should go away. read more

Since the beginning of this series of articles, the central topic has been calibration and its associated uncertainty. read more