The flow rate of the carrier gas determines how fast the sample moves through th

Question

The flow rate of the carrier gas determines how fast the sample moves through thecolumn. While the flow rate can be fixed on the GC, the accuracy should be checked occasionally with a flow meter. A simple flow meter is the bubble flow meter. This is just a glass tube with a rubber bulb at the bottom. The bulb contains some soap solution. The gas is led into the tube and the flow rate determined by measuring the time required for a soap bubble to travel a given volume (typically 10.00 mL). Based upon the diagram shown below, calculate the how long will it take for a soap bubble to travel 10 mL at a flow rate of 60 mL/min.

Explanation / Answer

Rate of flow is given i.e 60mL/min .

Rate of flow of gas is the rate of flow of bubble.

60mL volume travel takes time = 60sec.

10 mL will take time = 60sec×10mL / 60mL = 10 sec .

Hence 10 sec will be taken by soup bubble to travel 10mL.

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