lab midterm

FTIR

Fourier Transform Infrared spectroscopy

IR spectroscopy cannon differentiate between enantiomers

true

IR spectroscopy

Highly effective method that measures the amount of IR radiation, absorbed or admitted by a sample

advantage of IR

does not destroy sample

Requires small amount

Can analyze solid or liquid

what is the RF factor?

Distance of the dot /distance of the Solvent

preliminary color test for cocaine

scott reagent #7

what comes after preliminary test?

Confirmatory test

The stationary phase

silica

A solid or liquid supported on a solid

The Mobile phase

solvent

liquid or gas

The liquid Solvent should start

BELOW the line

The closer to the line the more

polar

what preliminary test is for opiates?

#1 Marquis

when the Scott reagent test is positive

Cocaine

blue or pink/blue

when Marquis test is positive

ecstasy → black

heroine → purple

meth → brown

The preliminary test is also called

color test

The preliminary test is probable cause

true

If solvent is above line, what will happen?

Dots will fuse together

Excedrin and Tylenol react with

acetone

Caffeine reacts with

ethyl acetate

why do we use FTIR

To analyze, unknown substances by analyzing the chemical composition by detecting different absorption rates of infrared light. This method provides valuable information about molecular structure and functional groups.

how does TLC seperate components

bases on the polarity of the different components that travel at different rates across the polar stationary phase.

lower polar compounds travel farther

true