Time of Flight Mass Spectrometry

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Time to drift away! Just keep an ion this vid first! This video goes though the stages of a time of flight mass spectrometer and all the explanations to make sure you get all those marks. Particularly useful for those studying AQA Chemistry.

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9 июл 2024

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Комментарии : 59

@Legenddeadman4ever 8 лет назад

This guy is classic. Instead of listening to my boring college tutor I just watch Chris. Get some good sleep in college though...

@AlleryChemistry 8 лет назад

+Legenddeadman4ever Ha!! Thanks very much. Lectures can be a little flat, I remember some of my uni lectures, I NEARLY fell asleep in them! Kept awake as I had a set of exams to pass. Stick with it! Thanks for your support.

@Legenddeadman4ever 8 лет назад

+A Level Chemistry Revision Videos by Allery Tutors Thanks for the vids man your they r really useful

@Cats-12f 8 лет назад

Clearest chemistry videos on RU-vid 👍👏😻

@AlleryChemistry 8 лет назад

+Amna Umar Thanks very much! I am pleased they are helping you.

@jamesbarker9116 8 лет назад

Thanks to you, I now have a better understanding of TOFMS, thank you very much Chris. Please continue making these very helpful videos. They are proving to be an essential supplement to my A-level Chemistry studies.

@AlleryChemistry 8 лет назад

+James Barker Thanks very much! Pleased they are helping so much! Plenty more vids on the way, keep posted! Please spread the word about these vids!

@AxelRosenvinge 4 года назад

Perfect and simple explanation! Thank you very much

@evalawrence6001 7 лет назад

Thank you this was extremely useful especially as I missed the lesson when our teacher went through this

@AlleryChemistry 7 лет назад

No problem! Have you just started A Level Chemistry?

@evalawrence6001 7 лет назад

yeah

@AlleryChemistry 7 лет назад

Hope you enjoy the course and get a decent grade.

@MrDAWOOD12 4 года назад

wouldn't the plates in the acceleration step be positively charged to accelerate the positively charged cations away from themselves? And if the plates are negatively charged, wouldn't the negative charge reduce the cations back to their atomic (not-charged) form? thanks

@fatimasultan9063 2 года назад

Thank you for the easy to understand explanation. :)

@Kh4lilJiw4 8 лет назад

Great videos, would appreciate more! Thanks

@AlleryChemistry 8 лет назад

+Khalil Jiwa Thanks very much! More on the way (and that includes my podcasts www.allerytutors.libsyn.com/), watch this space. Thanks for your support, it means a lot to me to think people are benefitting from them!

@haroon4330 6 лет назад

have u got a video on how to calculate tof

@aLi-jr8hx 6 лет назад

hi I am an A-level student chem and I’ve been told and I’ve searched that electrospray ionisation is when a proton is added to the molecule. Or is this video, possible to be used for the new 2017 spec. Thank you

@user-bh9qg6yo5h 6 лет назад

IYANTGMF1 Jafri yes, you need to know about electron impact ionisation and electrospray ionisation - in electrospray the sample is dissolved in a volatile polar solution and forced through a needle which is connected to a high voltage power supply. The sample molecule M then gains a proton forming an MH+ ion. In electron impact the sample is bombarded by high energy electrons from an electron gun which ends up knocking an electron from the sample forming a +ve ion. AQA said on their website it's important to know the difference between the two as well.

@hajrabatt8296 7 лет назад

Is this for the AQA spec? I'm doing edexcel, do these videos apply to that spec too or do we not need to know this in that much detail?

@AlleryChemistry 7 лет назад

Yes this is suitable for AQA. Not too sure about Edexcel. Will be splitting the video into categories for exam boards soon. Just taking a bit of time to organise.

@CopperKettle 7 лет назад

Thank you! A good explanation!

@AlleryChemistry 7 лет назад

You're welcome.

@laajchopra5074 3 года назад

Thanks 💜🤗for this lecture...

@carmila6940 Год назад

How do they all have the same speed if the lighter ones travel quicker ?

@heather1802 2 года назад

Great video thanks, but they don’t all have the same speed: same kinetic energy, different speeds which is why the lighter ones reach the detector sooner.

@moyosorefagbenro1918 2 года назад

Yea he said constant speed so i think he meant each individual ion won't decelerate, not that they all travel at the same speed :)

@salmanqureshi3361 7 лет назад

Hi very well explained- really useful thanks I was just wondering: could they ask a question which involves drawing this?

@AlleryChemistry 7 лет назад

Possibly. More likely to label and explain the different parts though.

@hussainrasiwala3728 6 лет назад

they will have same speed or energy?

@cantflyforshit 8 лет назад

would recommend to my class :D good for quick revising before an exam\quiz!

@AlleryChemistry 8 лет назад

+Naser Alomoush Exactly what I designed them to do. I'm pleased you are finding them useful and thanks for spreading the message about them!

@cantflyforshit 8 лет назад

thank YOU good sir for making them :D +1

@MyNameIsShobzy 8 лет назад

+Naser Alomoush No wayyyy NASERRR looool

@cantflyforshit 8 лет назад

whaa sc12

@cantflyforshit 8 лет назад

sc12 wait who are you? i feel like i should know you :D

@issobeesaw1705 4 года назад

Thanks very helpfull

@kiesharoy-johnson8166 3 года назад

Thank you very much...this was very helpful 😁😁

@AlleryChemistry 3 года назад

You're welcome!

@TrueDAN 8 лет назад

ty so much!

@AlleryChemistry 8 лет назад

+TrueDAN No problem! Please help by spreading the word.

@wanaismail2437 6 лет назад

why there is keyword for vaporization, is not the sample in solid phase

@Ewan0710 2 года назад

Damn, thanks Quais, this helps >_>

@nicholascairns1349 5 лет назад

Electrons are not "knocked out" of atoms or molecules in ESI (electrospray ionization), you are conflating this with EI (electron ionization) usually only done now in GC-MS. ESI is a much milder technique that forms protonated (pos ion) or deprotonated (neg ion) ions from liquid phases. It's not fully understood what the actual mechanism is yet but what we do know is very well explained in numerous RU-vid videos within.

@mahekjuyal4389 2 года назад

Great efforts

@AlleryChemistry 2 года назад

Thanks a lot

@bharathks5394 7 лет назад

Very informative. I have one query when we inject the sample into GCMS, in what form the sample will reach to MS. Because it should go to GC first know? Is there any divider to split the sample into GC and MS, separately? Thanks in advance for your response.

@AlleryChemistry 7 лет назад

Yes it will be in the vapourised form. The sample will have different retention times going through the GC. As soon as they leave GC they enter MS.