Ion Chromatography

Question 1

What is ion chromatography?

Answer 1

high pressure version of IEC

Question 2

What is IC good for?

Answer 2

IC shows great promise for the sequential determination of ionic species in a wide variety of water samples

Question 3

Non-suppressed IC

Answer 3

direct or indirect conductivity and indirect-UV detection

Question 4

Suppressed IC

Answer 4

two columns

a) IC columns - separates
b) suppressor column - decreases the background conductivity of eluent

Question 5

What is specific conductivity?

Answer 5

depends on the concentration of the individual ions, the charge, and the equivalent conductivity

Question 6

What is the equivalent conductivity?

Answer 6

a concentration dependent quantity

Question 7

One column technique

Answer 7

measurement of the difference between the conductivity of the sample ion and the eluent ion

Question 8

Two column technique

Answer 8

measurement of the sum of the sample ion and H+ and OH-

Question 9

For analysis of cations (supp column)

Answer 9

membrane is cation exchanger

Question 10

For analysis of anion (supp column)

Answer 10

membrane is anion exchanger

Question 11

Separation of both singly and doubly charged species is difficult in IC because __________

Answer 11

differences in selectivity and interaction with SP for 2 classes of cations is wider