Gas chromotography Flashcards
1
Q
What is gas chromotography?
A
Gas chromotography is a technique used to identify substances present in a complex mixture
2
Q
What is mobile phase?
A
An unreactive (inert) gas such as helium or nitrogen
3
Q
What is stationary phase?
A
A liquid covering the surface of a solid material
4
Q
Advantages of chromotography
A
Can detect trace amounts
Only need small sample
Accuracy
Quick and easy
5
Q
Disadvantages of chromotography
A
Expensive
Only works on volatile substances
You need specialist training
6
Q
In which part is the mixture seperated?
A
In the column packed with solid material
7
Q
In which part of the apparatus is the relative molecular mass of each compound in the mixture measured?
A
In the mass spectrometer/detector
8
Q
In which part of the apparatus are the results recorded?
A
The computer
