Just straight off the bat, this was brilliant!!! Thank you very much Mam. I had bunked my chemistry class when they were discussing this topic, so you just saved me. Thumbs up to you!!!
Very useful madam,in last video about Flame Emission Spectroscopy, you told calcium wavelength 622nm.I referred the book which you mentioned in comment,there calcium wavelength is 423nm.
Mam... I have a question..... I have gone through flame photometer... In that, the atoms get excited by absorbing heat by flame..... We have flame here in this AAS also, but why atoms don't absorb heat and get excited?!? Why we need a hollow cathode lamp?!
By using flame photometry we can analyse only alkali and alkaline earth metals, but using AAS we can analyse plenty of metals in addition to the above metals.. One single light source cannot be used to analyse all metals. There are many other sources to analyse specific metals. In flame photometry the is no light source for the metal ion to absorb energy and get excited. In AAS, light passes through the flame and hence the metals ions absorbs light and get excited. Flame is used to evaporate the solvent and nebulise.
Ma'am i have a question. Since we know that when an atom gets excited by a particular wavelength, it emits radiation of slightly lower energy, which means a slightly longer wavelength. But here the atoms are excited by the light emitted by the same element in the hollow cathode lamp, which have a lower energy than the radiation required to get excited. How's that possible ma'am?
Hi! After reading your comment, I started to questioning it too, and confused. I know it's been 3 years, but have you found a satisfying answer to this question?
Your videos are very helpful for learning concepts mam...Need more of these videos on analytical.... techniques of volumetric, titrimetric and gravimetric ...sample testing... specially when the classes are not going on.... Need your help mam...
Thanks for your compliments. I don't find enough time. I do this in my free time. Even I want to make many videos. I will do my best. In this pandemic even our work load has multiplied.
For activating the rest of the atoms under investigation which were under ground state at the flame region a specific wavelength of light is required. So in order to get the exactly required wavelength of radition the cathod needs tobe coated with the same analyte.
Lens may be used. Here we are showing the basic instrumentation, not the detailed one. It will be very complicated, not as simple as you seeing. This is just for you to understand the basics of AAS.
Just straight off the bat, this was brilliant!!! Thank you very much Mam. I had bunked my chemistry class when they were discussing this topic, so you just saved me. Thumbs up to you!!!
Thank you.
Very nice mam g very good lecture 👍
Thank you so much.
Very useful madam,in last video about Flame Emission Spectroscopy, you told calcium wavelength 622nm.I referred the book which you mentioned in comment,there calcium wavelength is 423nm.
For Li is only it is 621nm. for Ca it is 423nm. I will check whether I told by mistake..
I like your video very much. It's really great. I'll keep an eye on your channel. I am your fan and I will support you.
Thank you very much.
Mam... I have a question..... I have gone through flame photometer... In that, the atoms get excited by absorbing heat by flame..... We have flame here in this AAS also, but why atoms don't absorb heat and get excited?!? Why we need a hollow cathode lamp?!
By using flame photometry we can analyse only alkali and alkaline earth metals, but using AAS we can analyse plenty of metals in addition to the above metals.. One single light source cannot be used to analyse all metals. There are many other sources to analyse specific metals. In flame photometry the is no light source for the metal ion to absorb energy and get excited. In AAS, light passes through the flame and hence the metals ions absorbs light and get excited. Flame is used to evaporate the solvent and nebulise.
Ma'am, I cant thank you enough
I am very happy that you liked it and it helped you. Thanks for your compliments.
@@RevathiPurushothaman 😇😊
Mam where is the difference between flame spectroscopy and AAS?
Ma'am i have a question. Since we know that when an atom gets excited by a particular wavelength, it emits radiation of slightly lower energy, which means a slightly longer wavelength. But here the atoms are excited by the light emitted by the same element in the hollow cathode lamp, which have a lower energy than the radiation required to get excited. How's that possible ma'am?
In AAS, the light absorbed only is taken into consideration, not the light emitted.
Hi! After reading your comment, I started to questioning it too, and confused. I know it's been 3 years, but have you found a satisfying answer to this question?
Mam if this question comes in 15 marks will the content suffice ?
It may. Depends on the question paper setter.
Very precised explaination..thank u mam
Thanks. Moist welcome.
Really informative.
Splendid explanation ma'am.
The concept is well explained .
Thank you.
mam could you give [AAS] in pdf format also. plzzz..
Thanku... Genius
Most welcome.
Principle,application, instrumentation intha video la irukrathu pothuma mam
Enough for exam.
Mam how can I say tqs for u marvelous extraordinary no more words mam🙏🙏🙏🙏🙏🙏🙏🙏 tq mam love u so much mam
I am very happy that it helped you. Thank you so much for your compliments.
Your videos are very helpful for learning concepts mam...Need more of these videos on analytical.... techniques of volumetric, titrimetric and gravimetric ...sample testing... specially when the classes are not going on.... Need your help mam...
Thanks for your compliments. I don't find enough time. I do this in my free time. Even I want to make many videos. I will do my best. In this pandemic even our work load has multiplied.
Super mam
Thank you very much.
Nice explanation
Thank you.
Why cathode is coated with analyte metal?! Why not anode?!
Where does cathode and anode come into picture in AAS?
Hollow cathode lamp
For activating the rest of the atoms under investigation which were under ground state at the flame region a specific wavelength of light is required. So in order to get the exactly required wavelength of radition the cathod needs tobe coated with the same analyte.
UV FLUORESCENCE SPECTROSCOPY
Transmittance is the ratio of transmitted light over incident light,how we get the incident light in AAS?kindly clear this to me plz
Incident light is from hollow cathode tube or any other source used.
@@RevathiPurushothaman and Ma'am how it is measured to get the transmittance?
Spr , ur way of explaning mam tq so much
It's my pleasure. Thanks for compliments
Why lens are not required in AAS where as it's used in Flame photometer
Lens may be used. Here we are showing the basic instrumentation, not the detailed one. It will be very complicated, not as simple as you seeing. This is just for you to understand the basics of AAS.
ohhh it is good for me
vwery well explained covering alll the required data
Thanks for your compliments.
Whick book is better for this topic for reference?
Instrumental techniques by Willard, Dean and Settle, Analytical Chemistry by Gary Christian.
Thank you so much for this, it’s so explanatory.
It's my pleasure.
love from Bangladesh ....
Bohut acca hogeya.....
Thank you very much.
Mam u r special 💗
Thanks for your compliments and support.
What are the types of AAS? What does ICP-OES measures?
ruclips.net/video/il8gCHjKPVo/видео.html
Superbbbb......just luvd it
Thank you.
mam nice explanation
Thank you.
Exelent explain
Thank you.
Great explanations
Thank you.