Really love your explaination and each word was said very loud and clear. Really need it before my exam. Thanks Bill
@billstapleton2071
4 жыл бұрын
Glad it was helpful!
@prayhunter
7 жыл бұрын
awesome explanation... and i m amazed by your mirror writing skills... and i can't resist myself to give a feedback... again nice explanation thanks a lot...
@billstapleton2071
7 жыл бұрын
Thanks Kartik, glad you liked it.
@ieshaa1518
6 жыл бұрын
This explanation was pure gold, thankyou so much sir!
@toni-moystewart3010
6 жыл бұрын
This video was well conceptualized and presented. The information provided and the methodology utilized was successful in converting me from a Dummy in AAS to an informed student.
@donnachaodwyer385
7 жыл бұрын
brilliant video! when learning about the absorption spectroscopy we were told that we dont need to know how the AAS works for our final exams but i really needed to know how it worked in order to learn what it can be used for. this video was very informative, thanks!
@ganeshusretha123
7 жыл бұрын
Dear Sir, Thank you very much for this awesome explanation got everything in one shot. Thank you again
@HALOO_ANTON
2 жыл бұрын
Thank you so much this is so easy to understand greetings from Indonesia !!
@billstapleton2071
Жыл бұрын
You're very welcome!
@veus9887
4 жыл бұрын
This is the best explanation ever......good work
@akirauzumaki3805
3 жыл бұрын
Great explanation! Thank you very much for your efforts!
@ernestonoiran1852
4 жыл бұрын
Mirror writing skills = mindblowing !
@JUSTICEFORTHESIX
5 жыл бұрын
I have to give you feedback!🤩🥳🥰 Beautiful way of teaching. Thank you for that ! excellent !
@Kawiesh
6 жыл бұрын
Thank you very much 😀👍 This was explained excellently! Much appreciated.
@hassanabdimalik501
5 жыл бұрын
Best explanation i have seen, thank you so much for the video.
@niloufarmohammadi2447
4 жыл бұрын
Amazing 🤩I finally found the explanation I was looking for!Thanks a lot!
@aidintamm9200
4 жыл бұрын
manam hamintor..kheili komak kard:))
@jaykizzy
4 жыл бұрын
Woooow ur such a wonderful teacher
@billstapleton2071
4 жыл бұрын
Thank you! 😃
@elenanitot
Жыл бұрын
Love it!
@pipb1426
3 жыл бұрын
Thanks so much for the video! I know this is very late but I have a question - what is the purpose of the flame? Why can't you simply spray the metal solution in the air? Wouldn't the energy from the flame interfere with the amount of energy absorbed? Thanks so much again!
@billstapleton2071
3 жыл бұрын
The purpose of the flame is to vapourise the sample. The flame evaporates off the solvent that the sample is in, and it doesn't interfere with the energy absorbed as it is not the specific wavelength of the atoms in the sample, so is not absorbed by the atoms. Hope this makes sense?
@pipb1426
3 жыл бұрын
@@billstapleton2071 Ok that makes sense! Thanks so much for the reply.
@greeshmaak6238
4 жыл бұрын
Good teaching..
@mancillagarfiasabraham8392
4 жыл бұрын
Excellent video! I appreciate your effort in teaching the principles of Atomic Absorption Spectroscopy. Although, I do have a question about the wavelength absorbance in different elements. How can one calculate the wavelength needed to have a maximum absorbance?
@fatymaahmad8320
4 жыл бұрын
Briliant Sir. Please explain the Data Domain Map of AAS!
@Ravenjin00
3 жыл бұрын
thank you so much sir,you really help me
@ahmedisse7641
6 жыл бұрын
Thank you awesome explanation
@mochax
6 жыл бұрын
Best description ever... thanks thanks thanks
@sanderbrugman8157
4 жыл бұрын
I have 2 questions. 1 Does the sample you measure get in an exited state and emit light and so who can you correct it? How can the emission wavelength be the same as the absorption what about stokes shift?
@appliedanodize5420
4 жыл бұрын
I'm no expert but I think what happens is that the light gets absorbed and that is what you are measuring. The light that gets re-emitted when the atom goes back to ground state goes off in a random direction and never hits the detector.
@billstapleton2071
4 жыл бұрын
Hi Sander, sorry I didnt see this comment earlier. This is heading into Physics territory which is not my strength sorry, but as I understand it (and could be completely wrong!) is that each element absorbs and emits unique wavelengths of light that do not have to be the same wavelength as each other. It is just that it is unique to that element, which is why the shift between the wavelength of emission and absorption (stokes shift) can still be accounted for. Hope this makes sense and hope I have explained it correctly.
@billstapleton2071
4 жыл бұрын
That is true, you are only measuring the percentage of light that makes it through the sample. However I think Sander was asking about how the wavelength emitted from the lamp is absorbed by the sample when they could be different wavelengths (as he mentions with regards to stokes shift) where the emitted light is actually a higher wavelength.
@gpietra
5 жыл бұрын
Excellent!! Thanks
@Nana-vq7ui
6 жыл бұрын
!wow very good explanation! Wish my teachers would have the same capacity
@fayhamohamed2420
6 жыл бұрын
well done sir thank you very much
@romandarko2415
3 жыл бұрын
Whilst I understand that some of the light of the correct wavelength is absorbed by the atoms in the flame and putting them in an excited state, but what's to stop the electrons in these excited states from dropping down to their ground state and emit light (photons) of the same wavelength ? In emission spectroscopy, the atoms are excited in a high temp plasma which initially push electrons to higher states and when they return to their ground states, they emit photons of specific wavelengths to give a line emission spectrum. Or have i misunderstood? Thanks
@aidintamm9200
4 жыл бұрын
Thanks a lot!
@billstapleton2071
4 жыл бұрын
You're welcome!
@meynaz
5 жыл бұрын
Brilliant!
@sage7774
5 жыл бұрын
PERFECTION! this helped me out so much brother i have a test tmr hahah regarding volumetric analysis, chromatography and spectroscopy as well. thanks so much keep up the great work. easy like and sub for me
@Nashan_Layan
2 жыл бұрын
🔥 😮
@dedyleonardonadeak
5 жыл бұрын
Nice explanation!!
@khoacao4940
3 жыл бұрын
Why we need to burn the sample?
@jessesonnenschein5665
4 жыл бұрын
Awesome!!!¡ thank you very much!
@hazemkarkeni9328
5 жыл бұрын
Thank you Sir! I appreciate that
@lucytaki4241
5 жыл бұрын
Thnk u so much fr dis video... it really helped me... n d mirror ur using as blackboard is 👍🏻...
@francisanto6247
6 жыл бұрын
Very interesting
@okyanus1226
7 жыл бұрын
Great video but I would have a question. What kind of samples can be measured (metals in organic/inorganic fluids etc.) And how is this diffferent than a Graphite AAS?
@billstapleton2071
7 жыл бұрын
Hi Oky, sorry I didn't see this earlier. It depends on the AAS machine you use as to what you can sample. I have just tried to give a basic overall explanation that fits any AAS machine. As long as the fluid that the metal is in can be vaporised, it can be detected. A graphite AAS follows exactly the same principles, except that instead of a flame to vaporise the sample, it uses a small graphite tube that you place the sample in and then heat to vaporise it instead. Otherwise, same process. Hope this helps and thanks for commenting.
@camilledavy4807
6 жыл бұрын
This is a great video..
@guverasongs3315
5 жыл бұрын
Amazing thank you so much
@kabelomalale4175
7 жыл бұрын
awesome. thnQ
@szintiavarady7933
4 жыл бұрын
Okay
@gianementor9860
7 жыл бұрын
thank you!!!
@camjones110
4 жыл бұрын
Why should the HCL use the same element as the sample you are trying to identify?
@billstapleton2071
4 жыл бұрын
Hi Cam, the HCL emits light of a specific unique wavelength for that element. As the sample in the flame has the same element, that will absorb this unique wavelength. If you use any element other than the one you are testing for, it will not emit the right wavelength for the sample to absorb. Hope this makes sense!
@camjones110
4 жыл бұрын
@@billstapleton2071 that does make sense, thank you so much!
@Ibadkhaan
6 жыл бұрын
what is the automizer burner here and also what is the function of monochromater and detector
@billstapleton2071
6 жыл бұрын
Hey Ibad. The atomiser used depends on the spectromer used, but basically is just a flame where a liquid version of the sample is sprayed into (turning it into the atomised form). The monochromator is used to select the specific wavelength of light that corresponds to the hollow cathode lamp used, and the detector determines the percentage of light that has passed through the sample (the lower the reading, the more light was absorbed and the higher the concentration of the sample being tested). Hope this helps, and glad you liked the video!
@cskurasha
5 жыл бұрын
wow
@Ibadkhaan
6 жыл бұрын
and thank you sir
@Bunaenaer
4 жыл бұрын
okay
@lemao9995
4 жыл бұрын
ok
@gpietra
5 жыл бұрын
How can he write backwards?
@christofferhoward6568
4 жыл бұрын
Can he write letters backwards?????
@mihailpetrovici5044
5 жыл бұрын
Ok
@Repsyzz
3 жыл бұрын
how do you write like that
@billstapleton2071
3 жыл бұрын
Lol, it’s actually just that I write normally and flip the video in editing, I am actually right handed.
@Repsyzz
3 жыл бұрын
@@billstapleton2071 oh i see, great video
@tsheringlhamo6233
5 жыл бұрын
How the fuck is he able to write like this? hahaha
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