An Animated Lesson on Mass Spectrometry

Mass spectrometry is a great technique that can us give us detailed information about the mass and structure of a molecule. This video explains how it works.

Timestamps:
0:00 - What is Mass Spectrometry?
0:59 - Electron Ionisation/Electron Impact (EI)
1:50 - Fragmentation
2:36 - Chemical Ionisation (CI)
3:26 - Electrospray Ionisation (ESI)
4:11 - Acceleration
4:40 - Electromagnetic field deflection
5:22 - Mass to charge ratio (m/z)
5:42 - Time-of-Flight (ToF) Spectrometer
6:18 - Time-of-Flight (ToF) Calculations
9:56 - Cl2 mass spectrum
11:10 - Br2 mass spectrum
11:32 - Pentane mass spectrum
12:22 - Pentane (EI vs. CI/ESI)
13:34 - Identifying fragment peaks
14:28 - Pentan-3-one mass spectrum
15:02 - M+1 peak (carbon-13)
16:33 - 2-Chloropropane mass spectrum
17:07 - Dichloromethane mass spectrum
17:20 - 1-Bromopropane mass spectrum
17:43 - Dibromomethane mass spectrum
17:55 - Ethanamide mass spectrum
18:37 - GC-MS
18:53 - High Resolution Mass Spectrometry

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Thanks for your support!
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#science #chemistry #alevel #organicchemistry #education

[Chemistorian]

Hi everyone, I'm excited to announce that I now have posters available for the reaction schemes in this video:

Aliphatic reactions: rdbl.co/47y5oAk
Benzene reactions: rdbl.co/41W1qQM
Phenol reactions: rdbl.co/3NZc8QE

Perfect for learning organic chemistry (and supporting the channel at the same time!) 👨‍🔬

[sorlos]

Why does this not have way more likes and views!?? Its a really great explanation. THANK YOU for making this video!

[nishkab]

Couldn't have asked for a better video to explain Mass spec.

[AlexanderHiner-gb]

Thank you Chemistorian, your videos are undoubtedly the clearest and most accessible explanations of a fantastic range of topics. I am sharing as many as I can with my school chemistry department. I have certainly learnt plenty too.

[agatapios]

Amazing video! I never leave comments but this video helped me a lot with my exam, thank you!!!!

[udayakumarmani-vtsv]

I am understood nicely thank u very much sir

[apurbadas]

please make some video on absorption and emission spectrometry

[slirpydirpy]

Hey I might just be confused, but if you repeat an event with a certain chance you wouldn't add the precentages together, right? So the formula would be 1-0, 989^(5)= 5, 38%

[ShornDunlevy]

I kept an entire instrumental laboratory in work for over 2 years. Thousands of compounds underwent GC/MS & NMR which combined allow one to fully elucidate the absolute structure of many organic compounds.

However, optically active compounds required an extra step - polarimetry. It was evident not many people asked for this because they had to ask ME what form of polarimetry I wanted. That was a little disappointing.

I inferred that while they did a GREAT job at both the GC/MS and NMR, they didn't bother to work out what the compound actually WAS. It makes sense, I suppose. They were paid to provide instrumentation, not to interpret the results.

What did I learn? Never trust Chinese labs. If they CAN rip you off, they WILL rip you off. I refused to pay when the compound wasn't as specified and sent the GC/MS and NMR data to prove they hadn't produce the product... but a few would still argue the toss. Now I don't know if that was bad chemistry OR a management whose business model was to just try to get away with it based on enough people paying and just not using them again. Seems like a bad long-term strategy...

[ximenadelgadillo]

Thanks for sharing this video, I have a question, when measuring CO and N2 with the mass spectrometer, is there a way to differentiate them, using a mass spectrometer?

[albertoreyabuelo]

Great expanation. Why couldnt a molecule be broken in an C-H bond?

[Makdaddy-qy]

Okay, i didnt get a bit of what you were explaining, could you simplify everything after "Hello"