Exclusive Forensic Toxicology Articles

Free eye-opening Forensic Toxicology and Expert Witness articles are now available. Learn more about the private world of drug testing, forensic science, and more!

  • The Delta-8 THC Problem
    Delta-8 THC is a naturally occurring minor cannabinoid found in low concentrations in most cannabis plants. It can be produced synthetically from CBD and is not regulated in New Jersey and many other states. It is a recently popular and available recreational drug and is reported to have pharmacological properties… Read more: The Delta-8 THC Problem
  • Opiate Positive Test from Poppy Seeds
    Poppyseed ingestion has been clearly and repeatedly shown to be able to cause positive opiate results in urine tests, even at the Federally (US) mandated elevated level of 2000 ng morphine/ml.1 The first study, done by myself and others in 1987, demonstrated by GC/MS that morphine was present in both… Read more: Opiate Positive Test from Poppy Seeds
  • Cocaine in Hair Testing – Limitations
    Hair testing is subject to several limitations and reported pitfalls in detecting drug abuse due to a number of factors1 including variability in hair growth rates2 incorporation from external contamination,3 variations in individual incorporation, and hair binding.4 In response to these considerations, including the inability to distinguish environmental contamination, lack… Read more: Cocaine in Hair Testing – Limitations

Publications:

LW Hayes et al.,  Ethylglucuronide in Urine by LC-MS/MS with Human Excretion Profiles Following Dermal and Oral Ethanol Use, Society of Forensic Toxicology Abstracts, 2007, p. S25

Rosano T, Swift T and Hayes L.  Advances in catecholamine and metabolite measurement for the diagnosis of pheochromocytoma, a review.  Clinical Chemistry, 37:1854-67, 1991

Rosano T, Hayes L, Dybas M, Nazeer T, Ross J.  Evaluation of an immunoradiometric assay for cathepsin  D concentration in breast and endometrial tumors. (Abstract) Clinical Chemistry, 37:1055, 1991

Otvos J, Hayes L, Jeyarajah E, Freedman D, Janjan N.  Relationship between the proton nuclear magnetic resonance properties of plasma lipoproteins and cancer. Clinical Chemistry, 37: 369-376, 1991.

Hayes L, Krasseldt W, Mueggler P,  Concentrations of codeine and morphine in serum and urine after ingestion of poppy seeds. Clinical Chemistry, 33:806, 1987. 

Hayes L, Swanson JR,  Elevated ammonia results due to bacterial contamination of aca tubing.  Clinical Chemistry, 30:1882, 1984.

Hayes L,  Rapid partial purification of angiotensin-converting enzyme from human plasma- preliminary report. Clinical Chemistry, 30:1061, 1984. 

Ching SF, Hayes L, Slakey LL,  Angiotensin-converting enzyme in cultured endothelial cells.  Synthesis, degradation and transfer to culture medium.  Atherosclerosis 3:581-588, 1983.

Additional Resources for Information about Forensic Toxicology:
Soft-Tox.org
American Board of Clinical Chemistry
Oxford Academic