The use of point-of-care (POC) immunoassays has increased significantly and the menu of
analytes continues to expand. Most of the rapid immunoassays are currently based on …

Sweat is an alternative biological matrix useful to detect drugs of abuse intake. It is produced
by eccrine and apocrine glands originating in the skin dermis and terminating in secretory …

Oral fluid testing for drugs of abuse offers significant advantages over urine as a test matrix.
Collection can be performed under direct observation with reduced risk of adulteration and …

Comprehensive Sampling and Sample Preparation is a complete treatment of the theory
and methodology of sampling in all physical phases and the theory of sample preparation …

In assessment of exposure to environmental contaminants, the use of unconventional
matrices is becoming an increasingly important area of research. Saliva is one of the most …

A sensitive and specific liquid chromatography/tandem mass spectrometry (LC/MS/MS)
method for the simultaneous quantification of opioids, cocaine, and metabolites in urine was …

Interest in oral fluid as an alternative matrix for monitoring drug use is due to its ease-of-
collection and non-invasiveness; however, limited data are available on the disposition of …

Systemic as well as localized skin diseases modify the molecular composition of human
skin. Changes in skin chemistry have been observed in diseases such as cancer, psoriasis …

Anabolic–androgenic steroids (AASs) have been illegally used in counterfeit drugs to
improve the performance of athletes. In addition, AASs have been used for cosmetic …

The use of psychoactive substances is a serious problem in today's society and reliable
methods of analysis are necessary to confirm their occurrence in biological matrices. In this …