Modern Analytical

Question 1

Condition for a bond to absorb IR

Answer 1

There must be a moving dipole (the bond polarity changes)

Question 2

Steps in IR spec (4)

Answer 2

Monochromator, beam splitter, reference and sample, photomultiplier.

Question 3

Monochromator

Answer 3

Produces electromagnetic radiation of a specific wavelength for use in spectroscopy.

Question 4

(M–15)+

Answer 4

CH3

Question 5

(M–17)+

Answer 5

OH

Question 6

Conjugated systems

Answer 6

Alternating single and double bonds

Question 7

(M–29)+

Answer 7

C2H5 or CHO

Question 8

(M–31)+

Answer 8

CH3O

Question 9

(M–45)+

Answer 9

COOH

Question 10

Steps in AA (4)

Answer 10

Fuel/oxidant, atomiser, monochromator, detector.

Question 11

Adsorption

Answer 11

The process wherein the chemical sticks to the stationary phase.

Question 12

Partition

Answer 12

The separation of chemicals during chromatography, based on individual tendencies to adsorb and dissolve.

Question 13

Steps in Gas liquid chromatography

Answer 13

Injection, vaporisation, oven, partition, detection.

Question 14

Uses of HPLC (6)

Answer 14

Analysis of oil, alcoholic drinks, sugars and vitamins, polymers, biochem, insecticides/herbicides.

Question 15

Uses of GLC (3)

Answer 15

Urine samples from athletes, underground mine gases, blood alcohol levels.