18 Questions
What color should be observed in the organic layer after the addition of Reagent 3 in the Scott test for cocaine hydrochloride?
Blue
Which test is specifically used by forensic chemists to detect alkaloid drugs?
Mayer's test
In the context of drug testing, what is the purpose of the Duquenois-Levine Test?
Detect alkaloid drugs
Which test can be employed to detect drugs that may be mixed with marijuana?
Marquis Test
Which test is known for its ability to characterize one and only one chemical substance?
Mecke (or La Fon's) test
'A single test that identifies a substance' is referred to as what in forensic chemistry?
Confirmation
What is the Simon test used to detect?
Cocaine
Which compound reacts with the Duquenois-Levine Test, producing a purple color?
Cannabis
The Marquis Test is commonly used to test for the presence of which substance?
MDMA
What color change is observed in the Scott test when testing for methamphetamine?
Red
Which reagent is utilized in Mayer's test for alkaloids detection?
Sodium nitroferricyanide
Which drug-related compound is typically identified using the Zwikker test?
Barbiturates
What is the purpose of the Simon's Test in forensic chemistry?
To differentiate primary amines such as amphetamine
Which reagent is added in the Duquenois-Levine Test that reacts with a wide variety of substances?
Reagent 1 (solution of sodium nitroprusside in acetone)
What does the Marquis Test help identify in forensic chemistry?
Primary amines such as amphetamine
In the Scott test, which compound is responsible for producing a purple-red color when tested?
THC
Mayer's test is used to detect the presence of which compound?
THC
What is the purpose of the Duquenois-Levine Test in forensic chemistry?
To identify the class of drugs based on color changes
Study Notes
Qualitative Analysis
- Reagents are used to complete qualitative analysis of compounds and essential chemicals in laboratory examination reports.
- Chemical tests are often improved with procedure, and color changes are noted.
Screening Tests
- Color Test: detects psilocin and psilocybin compounds and THC using diazonium salt.
- Simon's Test: detects primary amines like amphetamine using two reagents.
- Marquis' Test: reacts with a wide variety of substances, including alkaloids, and places them into chemical classes by color.
- Duquenois-Levine Test: detects alkaloids, LSD, psilocybin, and mescaline, and can differentiate between them.
- Cobalt thiocyanate Test: detects cannabinoid presence.
- Chen-Kao test: detects THC and other cannabinoids.
- Zimmerman Test: detects psilocin and psilocybin.
Forensic Chemistry
- Forensic chemists use specific tests to identify drug substances.
- Mayer's test: detects alkaloid drugs.
- Erlich's test (Van Urk's test): detects psilocin and psilocybin.
- Dille-Koppanyi test: detects barbiturates.
- HCl test: detects cocaine using acid solubility.
- Liebermann test: detects alkaloids.
- Mandelin test: detects alkaloids using ammonium vanadate.
- Mecke (or La Fon's) test: detects alkaloids.
Confirmatory Tests
- Chromatography: separates components of a mixture by physical properties.
- Spectrophotometry: identifies a drug substance using infrared or mass spectrometry.
- Mass Spectrometry: identifies a drug substance using mass spectrometry.
- A single test that identifies a substance is known as a confirmation.
- A combination of tests is required to prove the drug's identity to the exclusion of all other known chemical substances.
Test your knowledge on the reactions of alkaloids (opiates, LSD, psilocybin, mescaline) and various substances such as morphine, heroin, and salvia divinorum. Explore how benzodiazepines react to 1,3-dinitrobenzene and other chemical compounds. Analyze reactions involving amine-containing alkaloids, MDMA, sodium carbonate, and more.
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