How a Simple UV-visible Spectrophotometer Works

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How a Simple UV-visible Spectrophotometer Works

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ChemSurvival

Күн бұрын

Пікірлер: 175

@ainaanajihahful 7 жыл бұрын

Amazing how I gained so much more from this 6 mins video than from two hours lecture. Thank you so much for the video! Cheers from UW Madison!

@ChemSurvival 7 жыл бұрын

Thanks for the kind words. It is so exciting to realize that I can reach students across the country and the world this way. I wish you the best of luck in school, but as a Penn State graduate, I think they will take my degree away if I publicly say 'Go Badgers'.... ;-)

@rainbowlife4646 2 жыл бұрын

kzfaq.info/get/bejne/o7KcgKtpr7qRlas.html

@6202kamel 3 жыл бұрын

Hi everyone, the home message to take from this video is 'The Beer-Lambert Law states that the higher the concentration of sample in a solution the more light is absorbed by the sample or the higher the absorbance value'.

@elmelunde 7 жыл бұрын

I rarely give the thumbs up, but think this video deserved it, because it was easy to understand.

@isragtgonzalez687 8 жыл бұрын

Professor Davis this video is simply excellent, mainly the part where you explain in an easy way the convenience of converting transmittance into absorbance. I definetly check your channel for more useful videos like this one. Great work!!

@ChemSurvival 8 жыл бұрын

Thanks! This is one of my early offerings on KZfaq, but still among those that make me proudest. I'm so glad that you liked the video. Please pass both the video and my channel along to anyone who might be studying introductory spectroscopy. Cheers!

@DavidWilson-sm2ym 2 жыл бұрын

There are SO MANY Uv-Vis spectrophotometry videos on KZfaq. I'm been looking them up for an hour. This is the only one without errors and the only one that isn't mind-numbingly boring. Thanks. If I could do animations, I'd do my own. I do wish that you'd animate what is happening in the molecules and atoms though.

@rainbowlife4646 2 жыл бұрын

kzfaq.info/get/bejne/o7KcgKtpr7qRlas.html

@joaquinisraelbolanosgutier4970 2 жыл бұрын

WOW.. what an intresting and easy way to explain the UV Vis Thecnique. Thank you Professor!!

@PSTWFBo 2 жыл бұрын

Spectroscopy/metry/Photometry! Vis/UV-Vis/IR Spectrophotometer, FTIR, Atomic Fluorescence S., Mass S kzfaq.info/get/bejne/m5mhoNR51qvSo2Q.html

@yohalakshmikumaravelu4482 4 жыл бұрын

Thanks a lot. Perfectly explained along with the images made it much more easier to understand.

@govindgiri8849 7 жыл бұрын

Thanx for making UV spectroscopy so much easier.

@kathleentamayo7874 2 жыл бұрын

Perfect way to explain a concept! Technical terms explained using layman terms and illustrations, then further illustrating concepts/relationships (e.g. using a visibly smaller I to denote a smaller intensity). Will keep this in mind when making presentations. Thanks so much Prof Davis!

@rainbowlife4646 2 жыл бұрын

kzfaq.info/get/bejne/o7KcgKtpr7qRlas.html

@squidpq 9 жыл бұрын

Great video. I really liked your illustrations. The explanation of why the Beer-Lambert Law is employed was very well done.

@ChemSurvival 9 жыл бұрын

Thank you for the positive comments. I am truly happy that this video has received such positive reviews! Please pass it on and encourage your friends/classmates/students to subscribe!

@saralabdoct2755 5 жыл бұрын

That was the best video I've seen on KZfaq on this topic 👌 Thank you sir! Greet job 👏👏👏👏👏

@ShreeRamJayaRamJayaJayaRam 9 жыл бұрын

explaining why we use absorbance instead of transmittance is good

@peterspencer 7 жыл бұрын

That was excellent. Very easy to understand. Well done sir.

@durganshtaneja 5 жыл бұрын

Great video sir! Very helpful. It is almost amazing how the concepts have been simplified and coupled with visuals.

@KeepRowing247 4 жыл бұрын

it is not almost amazing. it is amazing...

@samiramammadova4942 6 жыл бұрын

Thank you very much professor. You explained so clear

@sanskaripatrick7191 9 ай бұрын

Fantastic explanation. Visualization was really helpful.

@jonahmunene646 6 жыл бұрын

Thanks Professor Davis..With love from Kenya

@ChemSurvival 6 жыл бұрын

So glad you liked the video! Best regards.

@wiwikdwiharyanti2617 3 жыл бұрын

Thank you professor to share this, it very help for my students to understanding.. I used this video to explain them.. thank you very much.

@rainbowlife4646 2 жыл бұрын

kzfaq.info/get/bejne/o7KcgKtpr7qRlas.html

@ananthnm3014 2 жыл бұрын

"plz impruv inglizh" bro its super hard to understand u please use bettr english

@pratikjadhav1920 Жыл бұрын

Very Neat And Clean Explain Sir Thanks For This Video its very much Helpful for those who deeply understanding this Concept😇🙏

@esteladapper8892 7 жыл бұрын

Thank you sooo.... freaking much. You are awesome, professor Davis!!!

@ChemSurvival 6 жыл бұрын

:-)

@cnarbalc3401 4 жыл бұрын

Amazing explanation, thanks Prof!

@kinjabisusa8970 2 жыл бұрын

Thank you for the explanations not really complicated to understand,

@Pixelaze 3 жыл бұрын

Beautifully explained.

@nimawangchuk9899 8 жыл бұрын

Very much informative piece..thank you professor.

@titi14fan 9 жыл бұрын

thank you professor this has been really helpful

@jeffmore2793 5 жыл бұрын

zainab hujairi hi miss

@EminaA 9 жыл бұрын

This was amazing! Thank you so much!

@mdkamrulhasan7738 8 жыл бұрын

Excellent ..........Professor........Keep it continue. Thanks a lot

@ChemSurvival 8 жыл бұрын

+Kamrul Hasan Humble thanks, my friend. Lots more coming later this year!

@mariellesoldevilla8775 5 жыл бұрын

Thanks Prof!

@ChemSurvival 5 жыл бұрын

You're welcome!

@mariellesoldevilla8775 5 жыл бұрын

Tell me how can I ace organic chemistry Sir?😕

@ChemSurvival 5 жыл бұрын

@@mariellesoldevilla8775 Practice, practice, practice!!! Also, check out my amazing friends Leah of 'Leah4Sci' and Frank from 'Orgo Made Easy'. They both specialize in college-level organic chemistry and they have amazing KZfaq channels. kzfaq.info kzfaq.info

@lokeshgnanasekar 2 жыл бұрын

I really like your presentation Sir! Thank you for the video

@baraskparas9559 3 жыл бұрын

Great presentation!

@rainbowlife4646 2 жыл бұрын

kzfaq.info/get/bejne/o7KcgKtpr7qRlas.html

@alanax9276 Жыл бұрын

I started reading about caffeine in coffee and 2 hours later I ended up here.

@ChemSurvival Жыл бұрын

Welcome! 😁

@sabreenomarful 7 жыл бұрын

loved a lot..got to know very well....thanks professor!!

@ChemSurvival 7 жыл бұрын

Thank you for the encouraging words. Don't forget to look at the rest of my channel for more instruction in chemistry.

@razraz4058 7 жыл бұрын

simple and helpful, cheers from Kuwait

@Lifeisinruins 2 жыл бұрын

Thank you for explaining this!

@AbdulrahmanAlanazi 8 жыл бұрын

Very well explained, thanks!

@ChemSurvival 8 жыл бұрын

+Abdulrahman Al-anazi Thank you for the feedback! I'm glad you liked the video. There are plenty more on my channel kzfaq.info

@kledihila831 9 жыл бұрын

professor, you are great! thank you!

@ChemSurvival 9 жыл бұрын

Glad you liked/shared this! Don't forget to check out my channel at www.KZfaq.com/ChemSurvival and my DVD course at www.chemsurvival.com

@nurainanajwa4924 4 жыл бұрын

this video really helps a lot, thank you so much!!

@chikondiliomba642 7 жыл бұрын

You just made it easy for me. thanks alot

@ELICE6 4 жыл бұрын

So easily explained 😱 ❤️ Thank youuu

@houssemeddinelassoui6823 2 жыл бұрын

Best explanation, thank you.

@rainbowlife4646 2 жыл бұрын

kzfaq.info/get/bejne/o7KcgKtpr7qRlas.html

@Rekha-qk4dv 3 жыл бұрын

Thank you very much,helped me for my exam tomorrow

@rainbowlife4646 2 жыл бұрын

kzfaq.info/get/bejne/o7KcgKtpr7qRlas.html

@fakhriahrazali2881 7 жыл бұрын

thank you =D easy to understand and really helpful !!!

@nayabferoz2563 8 жыл бұрын

very helpfulll video.... i totally understood ultra visible spectroscopy. ....very nice keep it up sie👍👍👍👍👍👍👍👍

@rubayettanveer3479 4 жыл бұрын

Great! Keep it up, professor.

@naureenbutt960 Жыл бұрын

Dear Prof could u plz let me know if we are taking absorbance vs wavelength graph then we have to record absorbance for continuous movement of second slit? As Absorbance vs wavelength graph is very smooth could u plz pour some light on it.I will be really obliged.Tanks for such a nice video

@GameVoyager17 9 жыл бұрын

nice video. thank you professor .

@ashutoshbhatia8804 6 жыл бұрын

Thank u professor that's a very satisfied explaination

@s.anandhjesuraj5460 9 жыл бұрын

thank you. it is a easily understandable illustration videos...

@marlonaspuria4ever 8 ай бұрын

Thank you , sir.

@keralacodingacademykca4597 9 жыл бұрын

luved the explanation.well done mate!!!

@rahebhafezzadeh8033 Ай бұрын

well described, tnx

@MdSagar-vb2of 3 жыл бұрын

this video is incredible...

@chanadrababug3562 4 жыл бұрын

Excellent sir

@salmanahmed5831 7 жыл бұрын

very helpful professor

@madhus.3557 5 жыл бұрын

can you please help me solve this? Let assume that tryptophan absorbs maximum at 274 nm in benzene. If the tryptophan is transferred from benzene to water where water forms H-bond with excited state tryptophan, what will be the absorbance maxima? The strength of H-bond is 12 KJ/mole.

@triras_m1032 2 жыл бұрын

How does the detector converts the absorbance into electric current form

@leratohlekelelele2313 7 жыл бұрын

Can you provide a link for the next video lecture after this?

@AquilaLiberum 9 жыл бұрын

How do we get beam attenuation coefficient from these measurements? I am trying to measure water turbidity and am specifically looking for the scattering coefficient but can calculate this is if I can get the total beam attenuation and absorbance coefficients. Also, since I am looking at water as my medium, the light passing through it is just natural sunlight, what wavelength should I use for this? Thanks.

@ivana5515 3 жыл бұрын

Pretty clear, Perfect I would say, Thank you

@rainbowlife4646 2 жыл бұрын

kzfaq.info/get/bejne/o7KcgKtpr7qRlas.html

@LazeHeat 8 жыл бұрын

this is gold thanks

@elaafmohsin7165 7 жыл бұрын

really well explained :)

@kskksskkksss 8 жыл бұрын

THANK YOU ....... EASY TO UNDERSTAND

@xyzme1217 Ай бұрын

Thank you

@vajihehjafari9682 8 жыл бұрын

Thank u so much,it helped me a lot...

@austinnguyen9107 7 жыл бұрын

What happens when you use radio or X Ray light? It seems like it would work if from ur description

@mohammedarwahhussien9862 7 жыл бұрын

thank you...you made it clear to me

@xochitllee24 5 жыл бұрын

Professor Davis, how does this UV spectrophotometer compare to a UV DOAS multi gas analyzer?

@moustafasaadallah41 4 жыл бұрын

very good video

@Judyyesulcho 7 жыл бұрын

thanks for this! It was so helpful!

@keantelmeadus2566 9 жыл бұрын

When you do this and you have two different unknown of %T how do you find out the mg%

@shamsabatoolofficial1582 Жыл бұрын

Amazing 👍🏻

@johannesmphaka7433 7 жыл бұрын

thank u alot God bless you .....upload more please

@technovaluesales8394 6 жыл бұрын

Thank you superb explanation

@halimzaini1796 4 жыл бұрын

Thank a lot.

@ChemSurvival 4 жыл бұрын

I appreciate the comment. Good luck with your studies!

@ahmedisse7641 6 жыл бұрын

Great work dr

@ChemSurvival 6 жыл бұрын

many thanks :-)

@usharajbhar7464 8 жыл бұрын

thanks a lot 😊 it's helpful.

@slametarifin5369 4 жыл бұрын

How about uv-vis for thin film, powder and solution?

@empace5344 3 жыл бұрын

THANK YOU

@jayantmharolkar3631 7 жыл бұрын

What is the least count of Spectrometer ? please answer..

@Zabbani 5 жыл бұрын

Thanks 🙏🏻 professor

@ahmackalak7553 5 жыл бұрын

Hi Professor Davis! Thank you so much for making this video -- it makes UV Vis easier to understand! I was wondering if I could use your diagram at the beginning of the video in a lab report/cite you as a source?

@googlesz5162 9 жыл бұрын

Professor, would you mine to give subtitle for your video? Great video by the way, thanks!

@felixmboya5591 2 жыл бұрын

thus very kudos easy to understand

@PSTWFBo 2 жыл бұрын

Spectroscopy/metry/Photometry! Vis/UV-Vis/IR Spectrophotometer, FTIR, Atomic Fluorescence S., Mass S kzfaq.info/get/bejne/m5mhoNR51qvSo2Q.html

@jasdeepkaur9356 7 жыл бұрын

thank you so much

@maxmustermann2707 3 жыл бұрын

Why is it the ratio, what matters? Why not the difference between I and I0? What is the basic law?

@ananthnm3014 2 жыл бұрын

its just like all detection systems, comparing a smaple against a reference. here they use a ratio, and compare that to a database

@pug7552 6 жыл бұрын

Great video! Subscribed

@ChemSurvival 6 жыл бұрын

Thanks!!! I hope you find the rest of the channel helpful as well!

@1987amazonas 8 жыл бұрын

it was pretty helpul thx

@arshadjaved250 6 жыл бұрын

please leave a video over the substitution reactions of various organic compounds, like benzene gives this type of reactions, alkanes, alkenes alkynes give these etc, really hard to understand and memorize them, at least for me. So please do some sort of table, chart or something to memorize them too.

@ChemSurvival 6 жыл бұрын

I understand your frustration, but I think there is a problem in that you are asking for the lion's share of an entire semester of organic chemistry be distilled into a chart or mnemonic. Many have tried to do this before, some with more success than others. My channel, kzfaq.info has many videos, each of which attempt to touch on a single topic from this category (for example, I have a video on aromatic substitution at kzfaq.info/get/bejne/obp5gc6h07TUY5s.html ). Unfortunately to cover all possible reactions of all classes of hydrocarbons in one swoop probably isn't going to work out! Thanks for the comment and good luck with your studies.

@JaswinderSingh-bh1gr 3 жыл бұрын

Can u plz let me know UV Vis spectrophotometer and UV Vis spectrometer is same or different..?

@rainbowlife4646 2 жыл бұрын

kzfaq.info/get/bejne/o7KcgKtpr7qRlas.html

@ananthnm3014 2 жыл бұрын

same thing

@Visionary20248 7 жыл бұрын

Thanks a lot

@masadutta9992 6 жыл бұрын

Thanks! Been of much help!

@smclean5504 6 жыл бұрын

Amazing !

@ChemSurvival 6 жыл бұрын

Thanks, Shadine! Plenty more to see on my channel at www.KZfaq.com/ChemSurvival

@rajashrikarankal5010 7 жыл бұрын

thank u so much sir

@departemenfisika4102 3 жыл бұрын

great thank you

@mohitdoshi6662 6 жыл бұрын

What is beam splitter? exactly? is that a prism

@ChemSurvival 6 жыл бұрын

simple beam splitters are just crystals or mirrors that exploit reflection and refraction to direct a portion of an incident beam in different directions. There is a good Wikipedia article explaining for frustrated total internal reflection (crystals) and partial reflection (mirrors) and how these phenomena can split a light beam. en.wikipedia.org/wiki/Beam_splitter