8:50 the one thing you missed out on mentioning is the inverse square law. If you plot the potential energies of the ions between two poles, you get either a knife-edge (i.e. 1/x^2) where small ions roll off, big ones don't have time. Or you get a parabola-shaped ditch (x^2) where the big ions have enough momentum to get all the way up the walls. Don't know if it'll help anyone else, but I always like watching balls roll down planes.
Kind of like balloons of different sizes with different amounts of charges on each of them passing through 4 walls in a room. The walls probably can be taken akin to the 4 quadrupoles whose volts can be controlled. As they make their way through the room there are those that get stuck to the walls. The ones that don't get stuck and actually make their way through come out to be detected perhaps.
Hello, I have a question. At 7:02, the field in the Y plane shows one rod as ------+------ repeating. and the bottom rod shows as ++++-++++ repeating. Was this suppose to be intentional? That is why the smaller positive ion is stable?
Am I the only one who doesn't understand how these parameters a and q have been substituted from Mathieu's functions? Can anyone explain to me why α isnt equal to just q*U/mr^2?
A perfect example of how to explain complicated things in a simple way.
I love your humility and candor . That immediately puts the student at ease and more likely to ask questions and ultimately understand better.
You explain these things in such a clear way that it even makes it interesting. Thank you! You've done a much better job than my professor 😅
I am a proteomics professor in France. Your course is just great. thank you
Thanks a lot...cleared most of my doubts that I have been trying to clear them by reading all the available mass spectrometry books
That was an awesome example of how to visualize the quadrupole. Thank you.
I really appreciate it. these videos help me a lot to understand the concept of mass spectrometry better. please keep on making such kind of videos.
Very good explanation of the quadrupole mechanism! Thank you!
Wow what an explanation! Thank you! Great soundtrack too🤟
8:50 the one thing you missed out on mentioning is the inverse square law. If you plot the potential energies of the ions between two poles, you get either a knife-edge (i.e. 1/x^2) where small ions roll off, big ones don't have time. Or you get a parabola-shaped ditch (x^2) where the big ions have enough momentum to get all the way up the walls.
Don't know if it'll help anyone else, but I always like watching balls roll down planes.
Thanks a lot. It cleared a lot of uncertainties I had.
One of the best lecturers
Kind of like balloons of different sizes with different amounts of charges on each of them passing through 4 walls in a room. The walls probably can be taken akin to the 4 quadrupoles whose volts can be controlled. As they make their way through the room there are those that get stuck to the walls. The ones that don't get stuck and actually make their way through come out to be detected perhaps.
Clear, lively, and very useful!
that's the best explanation i found! thank you.
Thanks a lot!!! you did a very nice job with this explanation
These videos are so incredible.
wow, what an anwesome explanation! Thank you
Thank you for your incredible work!
i enjoy a lot your videos
Great explanation!
this is so funny and informative. THANK YOU
Hello, I have a question. At 7:02, the field in the Y plane shows one rod as ------+------ repeating. and the bottom rod shows as ++++-++++ repeating. Was this suppose to be intentional? That is why the smaller positive ion is stable?
Hi , I have the same question. The bottom rod show ++++- is correct or wring ? do you have the answer ?
I don't know for sure but I think it was mistaken. It should have been the same with the upper one.
Reminds me of Greg Doucette, especially the quad joke.
Great explanation
Thanks for your excellent explanation!
perfect explanation.million thanks
Fabulous lecture.
Thanks a lot for your Videos. The are very helpful and fun to watch :)
thank you it's excellent explanation
thank you! it's just perfect
Thank you for sharing
you look a lot like my doctor
Great video! Thank you!
Right at about 8 minutes it just blew my mind. Very cool. Right at about 9:30 I got very confused. ;)
great explanation, thank you!!
Where I Can found this vidéo in french?.please help me
Am I the only one who doesn't understand how these parameters a and q have been substituted from Mathieu's functions? Can anyone explain to me why α isnt equal to just q*U/mr^2?
Thanks!
thanks very much
you nailed it!
OH MY GOD THANK YOU
More quads than last time
amazing
Bonjour serait-il possible de mettre le script ?
I think you should be able to view the transcript now.
bravissimo
B-B-B-B-Bravissimo
Super
My muscle doctor referred me to my chemistry doctor
What up Greg’s bro
Are you sure you're a doctor and not a kinesiologist?
Coach Greg told me to go leave a comment more stupid than last time.
Who came here because of his 'doc' brother Greg Doucette?
yeah homie smart asf