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From what I have understood from the video and link, an ion is sent through a bunch of electric and magnetic fields, which slowly increase in strength. This means that heavier ions have sufficient time to turn in the chamber, whilst smaller ions don't turn too sharply. After the ion has travelled all the way through, you can tell its mass by looking at the line of the curve that it travelled - the sharper the turns, the heavier the particle.
I will still go to my school teacher and ask because I am still not 100% sure on it. But have I got what I wrote above right? @SWAN 2.0 @animazddhdnm
Mass spec is using electric or magnetic fields to exert a force on ions, which move according to their mass
Step 1:
You have 2 types of ionisation: electron impact and electrospray
Electron Impact:
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Particle is bombarded with electrons which knock off one of the electrons in the particle, forming a 1+ ion
•
This is generally used for lower mass particles
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The positive ion is attracted to the negatively charged plate, which accelerates the ion through the field.
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The ion can be broken down further. The fragments are also accelerated and causes different peaks to show on the mass spec (@animazddhdnm @SWAN 2.0 what do peaks mean here? I know what they are mathematically, but I don't know what they are in this sense)
•
Used for higher mass substances
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Fragmentation is unlikely to happen - this is called soft ionisation
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Sample dissolved in a substance, which is injected using a hypodermic needle (really thin)
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Needle attached to high voltage power supply, which ionises substance immediately
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X (g) + H+ ---> XH+ (g)
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Solvent evaps and XH+ ions are attracted to negatively charged plate
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This accelerates through mass spec
Step 2:
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1+ ions accelerated using electric field
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All ions accelerated to the same kinetic energy - meaning velocity is dependent on mass
Step 3:
•
Ion passes through hole in neg charged plate and move into flight tube
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Time of flight in tube dependent on velocity
Step 4:
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Once they pass through the mass spec, ions hit a negative plate, which causes ionisation of the ion
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The ionisation of the ion causes a current - size proportional to abundance
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Detector plate connected to computer which produces the mass spectrum
I think unless something drastic happens, I will be lucky to get an A in chem...
Physics and Maths tho, I expect nothing less than A*
Sounds fun
we havent got to the fun parts of maths yet tho 😥
and for physics we are looking at the strong nuclear force, which isn't exciting at all
Last time I did UKMT, I got silver in the junior. I need to graft hard for that though. Senior is the hardest and barely anyone gets gold in it.
Last time I did UKMT, I got silver in the junior. I need to graft hard for that though. Senior is the hardest and barely anyone gets gold in it.
I’ve got gold in the junior and silver in the intermediate. I have signed up too
32x+1 = 82 X 3x - 27
The little x's are variables. The big X is multiplication ---- I done this in maths today. Took a few minutes but I got it
32x+1 = 82 X 3x - 27
The little x's are variables. The big X is multiplication ---- I done this in maths today. Took a few minutes but I got it
Easy for me if it's 81, but unsolvable for 82. Is it supposed to be 81?
Just so anyone who wants to attempt it, the number is supposed to be 82. It is solvable
Im also doing the ukmt senior. I did it before in years 10 and 11 and got bronze and silver respectively.
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