Mass Spectrometry

[@taffyroosevelt7809]

You know a topic is hard when even Professor Dave starts to sound confusing.

[@cloudykumori8985]

😭😭😭😭 it makes no sense

[@fancytracy]

What is confusing about this video lmao

[@zeynepkoksal7228]

tamam en çok sen biliyon sana çok kolay ezik maymun@@fancytracy

[@mohammaddaud6585]

Your comment popped up first and gave me anxiety, it isn't confusing. It's just that probably you don't know sufficient scientific vocabulary

[@taffyroosevelt7809]

@@mohammaddaud6585 Sincerest apologies that my scientific vernacular isn’t up to your standard

[@rosablackwell64]

I work for a university. I watch Professor Dave's videos because he explains this stuff better than my own faculty.

[@lukehardin9]

Literally the only good Mass Spec video on KZbin

[@haneenA.A.]

Rlly?? I hope so. I decided to read the comments first then watch haha. I'm struggling big time with mass spec!!!

[@Adecto]

Khan Academy is also great)

[@U_big_mad]

Lol quit riding this man’s schlong bro 😂 it’s insane how many of y’all parrot the exact same thing across different videos and creators 😂

[@montsermuro3087]

I literally watched over 20 videos trying to understand this, and this was the ONLY one that helped. Thank you x100000000

[@Kvng375]

4 minutes with you is more effective than 120 minutes with my teacher

[@canyounot5594]

Preach

[@muno301]

True💯

[@poo01123]

straight facts

[@s.maazullah376]

ISTGGG

[@NoBigDill69]

...That’s what she said

[@chymisttv7028]

I'm Chymist, a final year chemistry student in Nigeria with a KZbin channel called Chymist Explains. I'm inspired by Professor Dave Explains 🤗. He's my role model.

[@Truck--kun]

*throws tuition at screen* why can't college professor teach this clearly!

[@Mr.McMuffin]

m8 I'm in 10th grade and I don't understand this at all

[@1SmokingLizard]

parents as chem teachers < your chem teacher < university chem teacher < some random YT tutorial < ChatGPT < Prof. Dave

[@Nikkeishajk]

the opening makes me smile every time XD

[@NewWesternFront]

i bet he did that on purpose to relax your brain muscles for the mental reaming of the content ahead

[@laurensettle3899]

Searched mass spec for dummys because i have to do a poster about it for an assessment, was not dissapointed.

[@hananon23288]

I click on ads for you because you're the best!

[@ProfessorDaveExplains]

+Hana Non you're my favorite!

[@TheTheaterThug]

Thanks Dave Grohl

[@vasilikikatsouda986]

lol

[@Truth_Çkr]

As a drummer, i am disappointed i didn't see it earlier

[@a.od-reszki4674]

I never thought that people who likes that music will whatch stuff like this (despite i like heavier things.. )

[@austinlincoln3414]

Lol

[@wlo23ex81]

Absolutely amazing. Until I found this video, I had so much trouble finding what the small peaks were, since I only found answers for the M+1 and M+2 peaks next to the molecular ion so I got confused if such isotopes were similar to the other smaller fragments.

[@reidmcneil1212]

I learn way from you than my O chem prof who has a PHD in spectroscopy

[@Mephiles550]

That fucker probably wasn't teacher material, just a guy with a PHD. PHD doesn't mean teacher. Shame college response to this is often just "Duuuh... wuh..?"

[@livthomson7244]

Professor Dave is even better at explaining topics than Khan Academy! Currently studying for the MCAT and couldn't have raised my Chemical and Physical Foundations score without you!!

[@JMSouchak]

I had to explain MS and the phrase I got from this video "vaporize it, ionize it, and smash it to bits" has been so helpful also it reminded me of the line "smash 'em, boil 'em, put 'em in a pot."

[@omarhamza7738]

Oh thank god for Dave. My Ochem 2 professor barely speaks English so this was very informative to me.

[@kareemapbio7332]

Analytical Chemistry is so difficult for me but I find it the most interesting. Dream job, analytical chemist with a concentration in organic synthesis.

[@erin1427]

Just in time for the ACS exam.. Thanks Professor Dave!!

[@halasimov1362]

Wow I thought this was way beyond my comprehension but you explained it so well! Sparked fascination

[@Hibyewt]

This was not confusing at all! Thanks so much. This helped explain things so much quicker, at least the basic concept. I feel prepared to continue further into the slides :X. I know I'll be one day able to make it into the veterinary science field!!!!! Thanks so much for your help Dave!

[@zhibaniola6460]

can mass spectrometer identify the ingredients of coke?

[@neithonosmani9783]

@@zhibaniola6460 I think you need to use both infrared spectroscopy and mass spectrum. Infrared spectroscopy to identify the type of functional groups. Maybe the ingredients can be identified if you know which ingredients have which functional groups I think?

[@koksalan75]

What if we have two or more compounds, let's say pentane and heptane together in a sample? How do we interpret the data then? Is it still possible to interpret ?

[@science75902]

It is even possible to interpret way more complex data ;) But not anymore by simply looking at the spectrum, that would be too complex 😅 then you have to use tools, which compare the spectra with data deposited in databases.

[@toantruong2581]

I saw this familiar face at every church I went to.

[@pabsz5903]

damn you explained this SO well, thanks man. Subbed

[@sumaiyaislam1152]

thankuu sir ..ur way of teachimg is very amazing ..ur student frm pakistan :)

[@ttwtt2488]

This is perfect, thank you. Re-watching the youtube advert!

[@itsmevien]

thank you for the wonderful explanation! ur new fan from Indonesia~

[@megamale1000]

Thank you this video helped immensely.

[@philfaith9141]

I find your explanations so easy to understand. thanks.

[@Biruk-k6s]

Thank you your method of explanation is better than other'

[@armandomendez2613]

Test tmrrw 😪 great video I probably learned way more than I need to know for high school

[@JoyceGem]

Prof. Dave, I'm taking Masters right now and we are self-learning these things. I'm thankful that you post videos on instrumentation. Perhaps you know how to teach us on method development? :)

[@freshtahs6555]

this guy is the only reason I would pass chemistry this year

[@wilt-read8988]

YOU ARE THE BEST, THANKS DAVE

[@engenheirometaleiro2268]

You are so clear, i’m impressed, as always

[@Koleys]

I just started an analytical job, and the chemist I’m shadowing tried to explain this to me over the course of 3 hours. I was so overwhelmed because when I learned this is university I used professor Dave’s videos and aced all my exams. But now I’m working with cannabinoids for the first time, and the computer does the majority of this work for you. I’m even more confused now. Sometimes the computer finds a 90% match and we are told to always stick with the computers choice if it’s above an 80%. If it’s below we’re supposed to just compare NIST charts to our results and determine to the best of our abilities. There are about 400 cannabinoid terpenes, and I genuinely don’t know how to approach my job compared to university work. Should I go off and study the NIST charts? Should I just give it time and learn as I go? I’m so lost and everyone I have shadowed at work has been with the company for 4+ years. They suck at teaching because it’s second nature, but I’m not sure how to configure work life. I’m so used to cramming and studying until 3am for lectures. Do I study for work? Or do I keep myself sane?

[@NewWesternFront]

how's it going

[@lauradc9036]

wish i'd known about you when i was in undergrad but now trying to review these topics for the MCAT it's been really helpful! thank u so much!!!

[@grandpatouchy8675]

Thank you professor Dave!

[@christinaornelas6151]

This is incredibly helpful.

[@catyy223]

Thank you soooo much! greetings from Germany!

[@a27670011]

thank you so much! this short video just helped me clarify the points that had confused me for a long time

[@7rfavelli719]

Great explaination. I already learned this but this video is great for refreshing props!

[@lakep7798]

Professor Dave, you know a whole lot, but do you know just how many people you have helped understand these concepts and ace their courses? ❤‼️

[@Lumi_icecream]

Hey! Don't forget the M+1 peak!

[@wk-pw7kj]

You are remarkable, thanks a lot

[@pavithrag5513]

This is the 1st time i'm watching your vdo. After watching this single vdo immediately i subbed and liked😊

[@Arya_Takeda]

Your videos are saving my grades 6 years later. Thank you! 😂

[@Aieshoo]

omg you clarified everything!

[@joshgeorge1714]

Great Explanation!!! Prof Dave

[@thabangncongwane1938]

You nailed it Prof.

[@bouchrabenz6072]

thank you my herooo

[@aliarene]

Thank You Dave!

[@andrewprinn2548]

this is so much easier to understand than what my professor said. thanks!

[@tenzinchoesang354]

Thanks for the simple explanation, extremely useful for my school's assessment!

[@frhneil1463]

amazing how much can be fit in 4 minutes. thank you so much !

[@Serotonin-rs5]

is it possible that elements also gets seperated ie Hydrogen and Carbon, or just whole molecules will only gets ionized ie CH4?

[@orca_ah]

yes, it is possible, those small peaks could also result from separation of H atoms

[@geetarani2875]

nice explanation dear sir

[@ahmufamily5054]

Ok seriously. I should've watched this at the beginning of the semester :/ so helpful!!

[@francklatouche6143]

Thank you so much professor Dave.You are amazing!👍👍👍👍👍👍👍

[@divyanimishra42]

Thanks Professor Dave

[@saadarshad4635]

Thank you so much Professor, this helped me alot for my chemistry class. Lots of love

[@orchalimsalam3275]

Thank you ,it is very important and very clear tutorial

[@faiqaimran7890]

Thank you!

[@Piocoto123]

A way that I found reasonable to understand it is with an analogy to chromatography, but instead of having a solvent, you have a magnetic field and instead of having a retardation factor, you'll have the mass/charge factor which determines the amount of specific -broken- and ionized products instead of distinct substances.. Is this right?

[@ProfessorDaveExplains]

ooh i like it! yes i think that's a pretty reasonable analogy, higher mass traveling more slowly is analogous to a more polar substance going slower up the plate.

[@christophergoudarzi9992]

Very helpful, thanks so much!

[@TALKyLIKEENGLISH]

Prof, what about little peaks around 29 au peaks, and more than it?

[@sajanimalshaniamarasingha5482]

that explanation is more effective sir. Please explain more advanced problems due to this part.

[@MrTote191]

4mins explained better than 1hour of my teacher

[@sneedle2316]

gordon doesn't need to hear all this he's a highly trained professional

[@misslee4245]

thank youuu.... keep it short and easy to understand is better

[@chris2656]

why do the smaller peaks appear at lower points on the line? Shouldn't they have a greater molecular mass if they correspond to c-13 or H-2 isotopes?

[@ProfessorDaveExplains]

hmm well it depends on the specific combination of nuclides i suppose, but yes generally we see n+1 peaks very commonly, for one instance of C13 in the molecule for example

[@nnataliered]

damn I just learnt this in such little time and my teacher couldn't even teach me in a week XD

[@orca_ah]

I am not quite sure. Is it possible to get a 72+ molecule? because there are no available electron pairs to knock out electrons of without breaking bonds. Say there is no O or N atoms with free electron pairs, all electron pairs are taking part in binding other atoms.

[@orca_ah]

I just found an answer to my question, lol. So the reason why the 72+ molecular ion is possible happens to be that the electron beam can knock out not only valence electrons, but also non valence electrons of an atom. So it is possible for electron beam to knock out some inner electrons of carbon atom resultin in a positive charged carbon - positive charged molecule

[@مُزهِرة-ر4خ]

A shout out for your helpful explanation

[@LedibelloLedi-hs3so]

Great explainer

[@zygaf6252]

Why isotope effect isnt observed on your spectra around m/z=72 peak?

[@julianp3385]

Amazing! Keep up the great work! :)

[@albertf.9198]

Thank u prof dave, cool video.

[@John-eq8cu]

ok, makes sense for organic compounds, but what about other stuff? a pile of silica sand, or a glob of mud, or a chunk of copper oxide?

[@apputhilak2473]

Thanks dave so helpful for me

[@rokayaahmad7617]

Great video prof thank you a lot

[@Justmyopinionlol]

awesome thanks bruh

[@jaejae8511]

how can one move on from the intro

[@billygraham5589]

I give a thumbs up here, and I don't give those to just anybody for any video!

[@onlineberuska9867]

Hi Dave, which machines are you using, and find most useful? Analytik Jena, Agilent, Bruker or value scientific? Keen to hear your thoughts on each .

[@ProfessorDaveExplains]

oh man i don't remember at all! last time i used them was in undergrad which was 14 years ago.

[@katewaldie3473]

10/10 explanation thank q dave!!

[@osman_editx__]

Your intro is hilarious😂

[@davidjohansson7646]

I am trying to find an explanation on thermal Ionization Mass Spectrometry and how it can be used to date archaeological findings? Do you have a video on that?

[@ProfessorDaveExplains]

I would imagine it has to do with measuring isotopic abundance.

[@PSTWFB]

Spectroscopy/metry/Photometry! Vis/UV-Vis/IR Spectrophotometer, FTIR, Atomic Fluorescence S., Mass S kzbin.info/www/bejne/m2TUnqR-pqqhqZI

[@clnst]

Does fragmentation occur randomly?

[@mitsoulas35]

Professor Dave, what happens if you forget to put the anthrone in the blank?

[@minabish1783]

Thank you

[@zeynepcokceken8429]

excellent!!

[@Spectrometer]

Your explanation is good but it only accounts for qualitative organic analysis. Mass Spectrometry not only serves to identify molecules but also, for example, counting metal ions in water (ICP-MS, IC-MS, etc.).

[@22alison19]

is it right to say that " because the ions have a formal charge of some kind, they have a specific curved charge " ??

[@ProfessorDaveExplains]

curved charge? nope i've never heard of that!

[@22alison19]

From what we learned, there is some curve path at the detector caused by the deflection of the charged ion@@ProfessorDaveExplains

[@22alison19]

curved* and each ion is causing a different curve it depending og its charge

[@MgFeMgFeSiOOH]

how do i know the height of each peak? i mean the relative abundance or intensity. i need it to draw a spectrum of a given molecule

[@ProfessorDaveExplains]

it should be listed on the axis of a spectrum! if you are just drawing one freehand i would imagine it's relatively arbitrary, the location on the x-axis is much more important

[@MgFeMgFeSiOOH]

ok thank you for the fast reply you'r the best! :D

[@mekdesbelete8766]

well DONE

[@ltmc2h694]

This + the IB data booklet #28 and everything suddenly makes sense.

[@JinkunYan]

when I am nine years old, the video has already existed. 😂😭

[@rassimsimou1594]

Good 😊

[@MissionHealth08]

How to identify and quantify different valency of particular element?