Mass Spectrometry
ฝัง
- เผยแพร่เมื่อ 25 เม.ย. 2016
- Who wants to smash molecules into little bits? A mass spectrometer does, that's who. This is a good technique for corroborating molecular structure, because we can make sure the puzzle pieces fit the right way. Check it out!
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You know a topic is hard when even Professor Dave starts to sound confusing.
😭😭😭😭 it makes no sense
What is confusing about this video lmao
tamam en çok sen biliyon sana çok kolay ezik maymun@@fancytracy
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
@@mohammaddaud6585 Sincerest apologies that my scientific vernacular isn’t up to your standard
I work for a university. I watch Professor Dave's videos because he explains this stuff better than my own faculty.
I literally watched over 20 videos trying to understand this, and this was the ONLY one that helped. Thank you x100000000
4 minutes with you is more effective than 120 minutes with my teacher
Preach
True💯
straight facts
ISTGGG
...That’s what she said
Literally the only good Mass Spec video on TH-cam
Rlly?? I hope so. I decided to read the comments first then watch haha. I'm struggling big time with mass spec!!!
Khan Academy is also great)
*throws tuition at screen*
why can't college professor teach this clearly!
m8 I'm in 10th grade and I don't understand this at all
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.
I'm Chymist, a final year chemistry student in Nigeria with a TH-cam channel called Chymist Explains. I'm inspired by Professor Dave Explains 🤗. He's my role model.
parents as chem teachers < your chem teacher < university chem teacher < some random YT tutorial < ChatGPT < Prof. Dave
Wow I thought this was way beyond my comprehension but you explained it so well! Sparked fascination
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!!!
thank you so much! this short video just helped me clarify the points that had confused me for a long time
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? :)
Just in time for the ACS exam.. Thanks Professor Dave!!
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!!
I find your explanations so easy to understand. thanks.
damn you explained this SO well, thanks man. Subbed
You are so clear, i’m impressed, as always
Thanks for the simple explanation, extremely useful for my school's assessment!
Thank you this video helped immensely.
YOU ARE THE BEST, THANKS DAVE
This is perfect, thank you. Re-watching the youtube advert!
Oh thank god for Dave. My Ochem 2 professor barely speaks English so this was very informative to me.
Searched mass spec for dummys because i have to do a poster about it for an assessment, was not dissapointed.
the opening makes me smile every time XD
i bet he did that on purpose to relax your brain muscles for the mental reaming of the content ahead
This is incredibly helpful.
thank you for the wonderful explanation! ur new fan from Indonesia~
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!
can mass spectrometer identify the ingredients of coke?
@@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?
I learn way from you than my O chem prof who has a PHD in spectroscopy
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..?"
Test tmrrw 😪 great video I probably learned way more than I need to know for high school
amazing how much can be fit in 4 minutes. thank you so much !
omg you clarified everything!
Amazing! Keep up the great work! :)
Great Explanation!!! Prof Dave
Thank you ,it is very important and very clear tutorial
Thank you so much professor Dave.You are amazing!👍👍👍👍👍👍👍
Great explaination. I already learned this but this video is great for refreshing props!
Analytical Chemistry is so difficult for me but I find it the most interesting. Dream job, analytical chemist with a concentration in organic synthesis.
Thanks Professor Dave
Thank you so much Professor, this helped me alot for my chemistry class. Lots of love
Thank you!
Thanks Dave Grohl
lol
As a drummer, i am disappointed i didn't see it earlier
I never thought that people who likes that music will whatch stuff like this (despite i like heavier things.. )
Lol
this is so much easier to understand than what my professor said. thanks!
You nailed it Prof.
Thank You Dave!
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."
Thank you professor Dave!
Very helpful, thanks so much!
Great video prof thank you a lot
Ok seriously. I should've watched this at the beginning of the semester :/ so helpful!!
I click on ads for you because you're the best!
+Hana Non you're my favorite!
Thanks dave so helpful for me
1. Heat up your mystery matter sample.
2. Ion-thrust those molecules into a magnetic field.
3. See where they land. Higher mass has lower deflection by the magnetic field.
4. Compare landing spot hit ratio to known samples.
5. Present list of likely ingredients of your sample.
You are remarkable, thanks a lot
Thank u prof dave, cool video.
thank youuu.... keep it short and easy to understand is better
thankuu sir ..ur way of teachimg is very amazing ..ur student frm pakistan :)
10/10 explanation thank q dave!!
Thank you soooo much! greetings from Germany!
nice explanation dear sir
This is the 1st time i'm watching your vdo. After watching this single vdo immediately i subbed and liked😊
Great video! I would've liked some comment on the m+1 peak though, since we can gather some info on # of carbons from the ratio of the M+ and M+1 peaks. Still don't totally get that, but I know I'm supposed to be able to tell number of carbons from it. haha Thanks again.
Great explainer
excellent!!
well DONE
this guy is the only reason I would pass chemistry this year
Your videos are saving my grades 6 years later. Thank you! 😂
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? ❤‼️
very helpful! THANK YOU (:
Thank you
you are amazing!
Thx! Useful!
A shout out for your helpful explanation
Thanks
awesome thanks bruh
Thanks man
that explanation is more effective sir. Please explain more advanced problems due to this part.
Why isotope effect isnt observed on your spectra around m/z=72 peak?
Thank youuu.!!!
Professor Dave, what happens if you forget to put the anthrone in the blank?
How to identify and quantify different valency of particular element?
Prof, what about little peaks around 29 au peaks, and more than it?
thanx bro...
what about C+ and H+ fragments
damn I just learnt this in such little time and my teacher couldn't even teach me in a week XD
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.).
is it possible that elements also gets seperated ie Hydrogen and Carbon, or just whole molecules will only gets ionized ie CH4?
yes, it is possible, those small peaks could also result from separation of H atoms
thx
gordon doesn't need to hear all this he's a highly trained professional
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?
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
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?
how's it going
So you have to manually compare 400 charts to your sample? Doesn't the computer do that for you?
bloody hell, I'm so sorry. regards.
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 .
oh man i don't remember at all! last time i used them was in undergrad which was 14 years ago.
Is it also possible to break C-H bonds and see loose hydrogens on the spectrum? By the way, your videos are greatly appreciated, thanks Prof.
hmm, i suppose? not too sure! i know usually it's carbon skeletal fragments
Perfect
thnx homie
I give a thumbs up here, and I don't give those to just anybody for any video!
?what about aromatic benzene compound? how to fragment
awesome!
Can you explain about M+1 that use for calculation?
if i remember correctly this has something to do with isotopes, like the relative abundance of C13 in a compound
Why vaporisation is necessary ?