gas chromotography Flashcards
1
Q
What is gas chromotography used for
A
separate and identify volatile compounds in a mixture
2
Q
What is the mobile phase
A
The substance that moves - carrier gas
3
Q
What is the job of the carrier gas
A
move the components of the mixture through the capillary coloumn
4
Q
Why is the capillary column so long
A
To make sure the full separation takes place
5
Q
What is the stationary phase in the gas chromotography
A
HIgh boiling liquid adsorbed into an inert solid support
6
Q
example of carrier gas
A
H2, N2
7
Q
what do we measure
A
retention time
8
Q
What is retention time
A
time from injection to detection
9
Q
what does the separation of liquid depend on
A
relative solubility
10
Q
Limitations of gas chromotography
A
- many chemicals have same RT
- similiar sub has similar RT
- unknown chemicals dont have RT
11
Q
what equipment do we use to get an organic liquid
A
QUickfit (distillation/reflux)
