FORS-2107EL Study Guide - Quiz Guide: Mass Spectrum, Tetrahydrocannabinol, Morphine
27 Jun 2018
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Drug Testing and Analysis Quiz Review
-Drug screening: investigators are looking for a specific substance
-Drug identification: when an unknown substance is subjected to many tests, to identify it
-Hair can be used to test for drugs, as hair follicles will show drug use immediately, and hair
strands can have drug traces in them for upto 3 months
-James March was the first man to use drug testing in a criminal case in 1830
-Having screening kits that identify for drugs (in the field) has reduced the amount of drug
samples that have been sent to labs for analysis
-Colourmetric tests are considered presumptive, and most of these tests use concentrated
sulphuric acid, then colour change occurs and this will be analyzed for positive or negative
results
-Odour tests are presumptive, ex. cocaine has a fishy or mint odour
-Samples of blood can come straight from the drug, or from blood, urine, or other bodily fluids
-Confirmatory tests are less likely to give false positives, and most common one is GC-MS,
which will give descriptors of retention time and mass spectrum
-UV-spectrophotometry can also be used as confirmatory test
-Marijuana is the most widely used hallucinogen, contains THC (tetrahydrocannabinol) which
is produced by the cannabis plant, and is almost all contained in the female marijuana flower
-Cocaine is a stimulant that gives a sense of euphoria, made from coca plant from the
amazon, for 1 pound of cocaine you need 500 pounds of coca plant
-Methamphetamine is another stimulant, that can be used medically (ADHD, obesity), or can
be abused for euphoric feeling, and is made by combining easily available drugs and
chemicals
-Opioids can be used to treat medical illnesses like in Vicodine or morphine, and they act on
neutron receptors to block signals and stimulate production of neurotransmitters to block pain
or stimulate euphoria
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find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
Drug screening: investigators are looking for a speci c substance. Drug identi cation: when an unknown substance is subjected to many tests, to identify it. Hair can be used to test for drugs, as hair follicles will show drug use immediately, and hair strands can have drug traces in them for upto 3 months. James march was the rst man to use drug testing in a criminal case in 1830. Having screening kits that identify for drugs (in the eld) has reduced the amount of drug samples that have been sent to labs for analysis. Colourmetric tests are considered presumptive, and most of these tests use concentrated sulphuric acid, then colour change occurs and this will be analyzed for positive or negative results. Odour tests are presumptive, ex. cocaine has a shy or mint odour. Samples of blood can come straight from the drug, or from blood, urine, or other bodily uids.
