Thank you for the video! Very helpful. At the end around 10:44 you should swap the description "do pass" and "do not pass" because like this it looks like a small window of m/z does not pass. But this is a small mistake in an otherwise very helpful video.
@davidmirander7415
8 жыл бұрын
Thank you very much. I didn't understand the alternating voltages before this, and now I understand the mass requirements for each set of quadrupoles.
@lorenzwirth
7 жыл бұрын
Thank you very much! Nicely explained, I finally understood.
@dkreller01
10 жыл бұрын
Yes, I will admit that the explanation is perhaps a bit too qualitative. When I posted I was expecting that there was a weakness there. However, I had a good time trying to explain this, and I am glad if this video helped you in your studies.
@lisaghosh3966
3 жыл бұрын
Excellent! Very informative. 👍👍
@simonagidova8856
5 жыл бұрын
Thank you from all videos about quadrupole this is the best for understanding😊😊helped much
@29Valle12
7 жыл бұрын
thanks!I found it very helpful and clear
@zhongpingliao3574
9 жыл бұрын
Very helpful vedio for understanding how DCand RF is used to select ions by the four rods. The only mistakes the m/z selection of the two dimentions (X, Y) should be overlapped in order to have a narrow m/z pass through the rods. Otherwise, no ion will pass through.
@sammyk1155
3 жыл бұрын
Very nice video Dr Keller, very helpful
@parniunplugged7023
6 жыл бұрын
very nice explanation for beginners.. Thank you very much
@neeleshukla
9 жыл бұрын
Very helpful in understanding the working principle of quadrupole.
@lucnegroni2045
11 жыл бұрын
super bien expliqué, merci Great, thanks a lot
@TheFormigalformigal
8 жыл бұрын
There is a mistake in the graph at 10:30. The Y edge is wrong. The label "Do pass" should be "Don't pass" and vice versa.
@haubentaucher8382
4 жыл бұрын
As far as I understand the X-dimensions switch should be shifted more to thr right and the Y-dimensions more to the left, so there is a small overlap. Flipping one of the dimensions would render the flipped one meaningless.
@codchemistryclub4358
4 жыл бұрын
No, it is correct as written. There are two voltages applied, + and -. Ions that are small WILL pass the first, (so their line is high), but they stop passing at a certain point (drops to the baseline). Large m/z will NOT pass the -DC rods, so they are at baseline (do not pass) and shoot up to "do pass" for +DC. The gap in the middle is the range of m/z of ions that will pass BOTH. The lines only represent the sizes that do or not pass each step. the correct size ions would be a 3rd color, at the top I suppose. The idea is to highlight the narrow window of sizes that will work, not show a line for them.
@MrElectricSkittles
8 жыл бұрын
excellent finishing diagram
@DP-vm2dd
Жыл бұрын
hi! at 4:04 the potential should not start from 0, because the radiofrequence voltage is V* (cos freq. *t). So it should start with a positive value. is it ri ght?
@kimtran7045
7 жыл бұрын
thank you very much
@prapsdy
7 жыл бұрын
at 11:34... shouldn't the do pass lines overlap? red line fitler is barring all the molecules that green line filter is allowing and vice versa.
@apiitg
3 жыл бұрын
You are correct. There is a mistake in that graph. They should have a narrow overlap for m/z to pass.
@Huangbeibei
2 жыл бұрын
I agree
@ThomasHaberkorn
2 жыл бұрын
A basic question: how is charge related to mass and in general how does the ion source work?
@fatemehrajabi2830
6 жыл бұрын
IS this application of magnetic quadrupole?
@debanjankar6811
3 жыл бұрын
The ions produced by MALDI can be analysed by TOF but not by Q, whereas ESI can be fitted with the second one. Why?
@fadukhan1697
7 жыл бұрын
Aloha I have Varian 820 ICP MS and have some issues. Can some one help?
@matteopiccioni196
4 жыл бұрын
Great explation..but how can a rod produce both a sinusoidal and constant potential?I also saw the electrical configuration of the genertors..but I'm used to think about than electrons flux are in movement or stationary....it is killing my mind
@sammyk1155
3 жыл бұрын
A DC voltage and an ac voltage are combined together. So if the DC is say +1 volt and the ac is 1 volt peak to peak it would be like the ac wave was raised 1 volt on the graph, so y=sin(X) becomes y=sin(X) + 1
@xuan-lc5vy
5 жыл бұрын
Please let me know, compare the cost of icp-ms quadrupole, flight time, multicollector magnetic sector. thank
@Nellaitamilselvan
2 жыл бұрын
I don't understand a point. How do you apply a RF in DC rod?
@ThePtgautam
4 жыл бұрын
i liked it
@yonatansmn
6 жыл бұрын
what happens to the ion after it crashes?
@Ed-uz1xw
5 жыл бұрын
The charge is electrically neutralized, at which point the ion is no longer charged. It is then removed by the vacuum system.
Пікірлер: 35