Gas chromatography | GC

Gas chromatography is a chromatographic technique used for the separation of
volatile compounds. The volatile compounds are the compounds that easily gets
vaporised at room temperature. Separation occurs based on the interaction of molecules with the mobile phase and the stationary phase. The less volatile molecules interact more with the stationary phase and moves slowly
where as more volatile molecules interact more with the mobile phase and moves fast. When the sample is detected the computer gives a peak with respect to the retention time of the sample.
The area under the peak gives information about the concentration of the sample.

[prangyadas]

A detailed information in a very shorter period of time and was explained in a crystal clear manner. Excellent.

[sayurirathnayake]

Thanks a very lot.i studied A to Z clearly from this video.it's amazing how you explain them simply.please make more & more videos.Good Luck

[pepe]

oh dude thank you. finally a way to understand this. the terminology of a gas chromatograph is used so much with mass spectropy that its difficult to figure out whats what. i had always thought those peaks on the chart were speaks on a spectrum! this has cleared a lot up for me, thanks.

[sarahkamau]

Very well done! You're really helping us beginners! Thank you!

[prayoga]

Very brief and to the point. Love it. Thank you so much.

[mustafeabdiazizismail]

Thanks 🙏 to your efforts, we finally understand the different types of chromatography

[Rootfresh_channel]

Last sem exams I prepared some of difficult topics from your channel and got a 86/87 marks..

[tuffel]

Thank you this was the exact format and presentation I needed

[sequeira]

summary of the video:
GC is used for the separation of volatile compounds( compounds which are easily vapourized at room temp)

Components of GC:
1) SAMPLE is mixed withe a highly volatile compound like Hexane, cyclohexane, etc.

• Long coiled column: can either be a packed column(made of glass/stainless steel) or Capillary column (made of fused quartz).

this column is placed in a CHAMBER in order to facilitate a uniform temperature. (HIGH TEMP)
During analysis, placed at 150-300°C

• the SP is packed in the column. it is usually made of silicon grease or wax as it can withstand high temperature

• Presence of a SEPTUM to inject sample just before the chamber - the temperature of the injection region is 20-50° higher than chamber. this is to facilitate the rapid vapourization of the molecules.

2) Mp: usually helium / nitrogen (inert/unreactive gases are used) are placed in a cylinder connected to the Column via the Molecular sieve.

3) Molecular sieve is used to filter out unwanted HCs, Water vapour, oxygen etc that may interfere with the sample during experimentation.

4) Detector

[bankthanadorn]

Well explained, better than my lecturer tbh thankss

[fantasticcreativity]

O my God, , , such an amazing explanation
Love it, , , clear my all doubts and confusion

[sibghatkhan]

Stupendous!! It is great effort
You have make it clear as crystal 🔮 mirror

[MrKpy]

I work for a company in the Chemistry industry that manufactures instrument and that was pretty accurate, good job. Only thing is inlet is at 20-50C higher than the max temperature reached by the GC and there is also an inlet of Makeup Gas for the FID which is usually to compensate the fact that nitrogen or helium coming from the column is usually much lower than the other gases. Other than that, great video

[SaliyaNkhoswe-wy]

Respect 🙏 from Africa Zambia better than my lecturer for a year thanks I know love this course❤

[rimm]

I like these videos. They just make my life easier. Thank you so much for the

[shourovhossain]

video clear the concept of chromatography.

[imtme]

thank u, u are so helpful, more helpful than my lecturer

[sarahholland]

this is amazing. so simple and clear. thank you!!!!

[mumizashahid]

Very very very very helpful
Thanks alot for this

[arbazchaudhary]

thanks for this video you explained
very well