1. 6-5 Collection and Preservation of Toxicological Evidence
Unit 6: Toxicology
April 22, 2015
Sanders

2. Testing for Toxins
To determine toxic drug substances the forensic toxicologist must devise an analytical scheme to
detect
isolate
identify
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Unit 6: Toxicology

3. Forensic Toxicologists
Forensic Toxicologist extract from
biological fluids
tissues
organs.
Looks for drugs, heavy metals, carbon monoxide.
May 20, 2019
Unit 6: Toxicology

4. Accuracy
A screening test gives quick insight into the likelihood that a specimen contains a drug substance.
May 20, 2019
Unit 6: Toxicology

5. Detecting Drugs in the Hair
Hair is nourished with blood, blood tainted by drugs becomes part of the hair and permanently part of the hair.
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Unit 6: Toxicology

6. Analysis
Since hair grows at 1 cm per month, there is a fairly accurate timeline of drug consumption.
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Unit 6: Toxicology

7. Positive Test Results
Positive results arising from the screening test are tentative at best and must be verified with a confirmation test.
May 20, 2019
Unit 6: Toxicology

8. Confirmation Test
The most widely used screening test or thin layer chromatography, gas chromatography, and immunoassay.
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Unit 6: Toxicology

9. Drug Confirmation Test
Gas chromatography/ mass spectrometry is generally excepted as confirmation test of choice.
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Unit 6: Toxicology

10. Drug’s Effect
Once a drug is extracting identified, a toxicologist may be required to judge the drugs effect on an individual's natural performance or physical state.
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Unit 6: Toxicology

11. May 20, 2019
Unit 6: Toxicology