Gas Chromatography

1. Which of the following is used to inject sample into the column of gas.

• Gas tight syringe.

• Micro-syringe

• Rotary sample valve

• Solid injection syringe.

2. Capillary column is open tubular columns constructed from which of the following materials?

• Glass

• Metal

• Stainless Steal

• Fused Silica

3. Select the correct statement about simple inlet

 

I    allow for the injection of the sample

II   its allow rapid volatilization

III injected into a port that has been preheated to 300°c.

IV during analysis the temperature is kept between 150 to 300°c

 

• I, IV, II

• I, III, IV

• IV, III, I

• I, II, III

4. Which is TRUE statement about the stationary phase

The ____ volatile molecules moves ____ in stationary phase

• less, faster

• mole, faster

• less, slower

• mole, slower

5.What is a full name of FID detector?

• A) Free induction decay

• Flame ionization detector

• Fuel injection diagnostic

• First input delay

6.  How many inlets in FID detector

• 3

• 5

• 4

• 6

7. Which of the following can be found in Gas Chromatography?

I Gas tank valve

II GC oven

III Gas flow controller

IV Cylinder

• I, II, IV

• II, III, IV

• III, IV

• I, II, III, IV

8. What is the function of Gas chromatography syringe?

• To keep liquid and gasses

• To take a blood from patient

• To inject the sample inlet

• To transfer the solution to vial

9. Which of the following is the RIGHT sequence of sample following into gas chromatography?

• From sample to sample inlet, stationery phase, column and detector.

• From sample to sample inlet, column, stationery phase and detector.

• From sample to sample inlet, detector, column, and stationery phase.

• From sample inlet to column, stationery phase and come to detector

10. Which of the following mobile phase must be used with CAUTIONS in Gas Chromatography?

• He

• N₂

• O₂

• H₂