Controlled Substance

Contact Information

Erik Frazure

Section Chief – Controlled Substance


Pearl                             Batesville

601-420-9000                662-563-6435

Meridian                        Gulfport

601-483-5273                228-396-7400


The Mississippi Forensics Laboratory Controlled Substance Section performs analysis in the Main Laboratory in Pearl and the Branch Laboratories in Batesville, Meridian, and Biloxi. 

The Controlled Substance Section examines evidence to determine if any controlled substances are present.  In addition to controlled substance examinations the section also performs analysis for precursor chemicals used in the illegal manufacture of controlled substances as well as general chemistry examinations. 

The Controlled Substance Section receives approximately 12,000 cases a year which account for approximately 50% of the cases submitted into the laboratory.   The lab examines a wide variety of evidence such as plant material, liquids, powders, and rock like substances.  The approximate breakdown is listed below: 



The laboratory utilizes a variety of testing in order to determine if a controlled substance is present and its identity. 

Presumptive examinations

Microscopic Examinations

Marijuana identification uses microscopic analysis to identify the botanical features characteristic of the marijuana plant. 


Chemical Test

Chemical color test are used in the identification of powder and crystalline substances.  Common test performed are the secondary amine and the cobalt thiocyanate test. 


Confirmatory Examinations

Infrared Spectroscopy

Infrared spectroscopy is a technique used in the laboratory for conformation of controlled substances.  The instrument makes use of infrared radiation to obtain an infrared spectrum.   A substance is exposed to infrared light which causes a molecule to vibrate in a repeatable and predictable pattern. This vibration pattern is then used to produce an infrared spectrum which is used for identification.  

Infrared Spectrum of Cocaine base



Gas Chromatography/Mass Spectrometry

Gas chromatography is used to separates mixtures into individual compounds based upon a compounds physical and chemical properties. These compounds are then identified using mass spectrometry.  Mass spectrometry will determine the mass to charge ratio and abundance of the compound’s ion fragments.  These fragments are used to produce a mass spectrum which is used for identification. 

Mass Spectrum of Cocaine