21 күн бұрын
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11 ай бұрын
Жыл бұрын
Пікірлер
@crispyshaw9204 25 күн бұрын
Thanks Jenni. Nice to put a face to a name. Thanks for the advice you have given to us at Cranfield University with our old kit accessories.
@lingrao1414 Ай бұрын
I like Jenni's Tip of the Week. I will try hand sanitizer to confirm the polarizers in my lab.
@PIKETechnologies Ай бұрын
Wonderful!
@oviddicoi3290 Ай бұрын
Please let me know how the Three accessories for the FTIR analysis of liquid can be mounted on Perkin-Elmer spectrum two. PIKETechnologies 895 subscribers Subscribed
@miguelangelguerrerogonzale5429 Ай бұрын
Excuse me, what is the reason of this phenomena ? in theory is the same polymer
@Muonium1 Ай бұрын
presumably these are pure single crystals of zinc selenide?
@darrenschwede4806 2 ай бұрын
Simple, but effective - I like it!!!
@PIKETechnologies Ай бұрын
Glad you like it!
@luckylimatik 2 ай бұрын
Where do you get these plastic razor blades?
@PIKETechnologies Ай бұрын
hello there! Please contact us directly and will be happy to help! [email protected]
@desterward 2 ай бұрын
nice video. is it possible to use with any organic solvent? I would like to use NMP. do you have any chart of solvent compatibility?
@DrHenry1987 3 ай бұрын
The next question is of course, how to clean that cell and do you need to run spectra to see that it is clean?
@PIKETechnologies 3 ай бұрын
Hi Henry, Great question - we have a tip how to clean your cells made already! Here is the link: kzbin.info/www/bejne/lYbZcqGYrcuFbKs And yes, you should run another measurement to confirm :)
@DrHenry1987 3 ай бұрын
Where did you get 100% aspirin?
@PIKETechnologies 3 ай бұрын
Aspirin was purchased through a specialty chemical store. 😊
@DrHenry1987 3 ай бұрын
@@PIKETechnologies I'm surprised they listed it under the name "Aspirin" instead of the chemical name.
@AndrePeters-s7m 7 ай бұрын
Hi Jenni This is really nice trick 😀👍
@PIKETechnologies 7 ай бұрын
Thank you! Cheers! ❤😊
@brianwise851 7 ай бұрын
"Promosm" 🌈
@PIKETechnologies 7 ай бұрын
Hi Brian, if you take a moment, you will find many valuable tips and tricks on our channel that do not specifically require our tools and accessories. Take care!
@markt5973 8 ай бұрын
Whaaaaat?????!!! A Pike Tech Tip-of-the-week on a Wednesday?!! You had me going to the calendar to see if I had unknowingly skipped a couple of days this week :) As always very informative - thanks!
@PIKETechnologies 7 ай бұрын
Haha thank you so much! Though I am not sure why it only showed up for you on a Wednesday, this one was published Jan 19th! We wish we could post mid-week to change it up a little, but consistency keeps the momentum going. Thank you so much for your support!
@رمضانمحمدكحيل 9 ай бұрын
Can we get the app, please?
@PIKETechnologies 7 ай бұрын
Hi there, you can access the calc app on our website! piketech.com. Main menu -> resources -> PIKE Calc
@長野亜矢子-b1k 10 ай бұрын
thank you. Is it possible to use reflection absorption in not flat surfaces such as wire?
@LaCo1028 10 ай бұрын
It was a challenging experience for sure. Thanks for all the support provided.
@PIKETechnologies 7 ай бұрын
Thank you so much for YOUR support.
@cammacisaac1 11 ай бұрын
Stearamides like to bloom, so it will be back after wiping. LOL.
@decalogians9321 11 ай бұрын
Hey Jenni, no information on Gold
@decalogians9321 Жыл бұрын
Hello Jenny, we have not gotten feedback from pike on some of our questions
@PIKETechnologies 11 ай бұрын
Hi there, Thank you so much for your patience! I'm sorry to hear not all of your questions were answered. Can you please contact us via [email protected]? Thank you again and we look forward to serving you!
@Trogdor204 Жыл бұрын
We have a KBr cell that has been used to test DCHA. Will this method still work and what solvent would you recommend?
@PIKETechnologies 11 ай бұрын
Hi Joel, DCHA is soluble in most organic solvents. Be sure, however, that your solvents are dry. Even a very small amount of moisture in the solvents can cloud your KBr cell windows.
@BeeHiveEater Жыл бұрын
The video is all black screen, nothing can be seen.
@PIKETechnologies Жыл бұрын
Hi there, can you try refreshing the page? Please make sure your video plays automatically, otherwise, you may need to manually click the 'play' button. If you still have trouble, please contact us directly: [email protected]. Thank you!
@BeeHiveEater Жыл бұрын
Hello. Now I can see it. Fine.
@PIKETechnologies Жыл бұрын
Hi Danny, so happy to hear!@@BeeHiveEater
@kazukiwatanabe5384 Жыл бұрын
Jenni-san, Thank you for testing the wedged window liquid cell. This is very helpful for us.
@PIKETechnologies Жыл бұрын
Glad it was helpful! 😊
@sherryhemmingsen8040 Жыл бұрын
nicely done as always, Jenni!
@PIKETechnologies Жыл бұрын
Thank you!! 😊
@user-rz6qu5xk6y Жыл бұрын
I've enjoyed all of your tips of the week. Have you ever considered doing one on highly absorbing materials, like biochars?
@PIKETechnologies Жыл бұрын
We are so happy to hear you enjoy our tips, and love your suggestion. We’ll see if any of our colleagues have a firepit to grab a sample for measurements. Stay tuned!
@wildreams Жыл бұрын
Wouldn't there be residue of the solvent in the cell? Do we just leave it to air-dry?
@PIKETechnologies Жыл бұрын
Thank you for your question, @wildreams. To avoid residue/contaminants, be sure to use an ultra-clean, spectroscopic-grade solvent. To dry the cell, I like to use an empty syringe and push air through the cell to speed the drying process. 😉
@mirceadanpuia9688 Жыл бұрын
The AR coating would not absorb IR radiation, or the absorption bands would be negligible?
@PIKETechnologies Жыл бұрын
Hi @mirceadanpuia9688, We use a broadband AR coating, which provides a nice wide range and does not interfere with the mid-IR spectral range. If you look at the energy throughput spectrum shown at the 1:40 min mark you can see small signatures due to the coating, but these will ratio out. 😊
@martimchaves1658 Жыл бұрын
The video is from two years ago, but I have a question. If I put for example KBr and do a backround and then put my sample and subtract, will the contaminants disappear?
@PIKETechnologies Жыл бұрын
Hi Martim, When ratioing your sample spectrum to your background, contamination, for the most part, will cancel out if you are diluting at a very low concentration. Feel free to reach out to us via piketech.com with more questions! :)
@staceyl788 Жыл бұрын
Thanks for the tips! Any thoughts on sloping baselines for particle samples? I've gotten severe sloping on gold nanoparticle deposits that I could never resolve. I think I once read that this could be from scattering by the particles? Not sure if this is related to the critical angle issue you mentioned or a different phenomenon.
@ishakboukhetache1505 Жыл бұрын
Hello madam. I use 3 mm transmition disq and some time i see some sinus waves, i reduse it by smothing but it not helpful and causes data losing, how can i fix it??
@PIKETechnologies Жыл бұрын
If you are seeing fringing using a liquid transmission cell with ZnSe windows, the easiest resolution is to consider a lower refractive index window relative to ZnSe---this will significantly reduce fringing. You can see an example of an aqueous sample here: kzbin.info/www/bejne/qZLaeXudqKura7c You are always welcome to reach out to us directly and we can discuss your sample and spectra further!
@darrenschwede4806 Жыл бұрын
Excellent - I wish I had thought of this in the past. I'll definitely suggest this technique as a possibility when our researchers are having difficulty! Thanks much!
@PIKETechnologies Жыл бұрын
Thank you, Darren! We are so happy to hear you found our tip helpful!
@johnnewman3221 Жыл бұрын
where to get the IR liquid
@PIKETechnologies Жыл бұрын
Hehe 😊
@PIKETechnologies Жыл бұрын
www.piketech.com/product/tr-demountable-liquid-cell/
@LaCo1028 Жыл бұрын
Great tips as always!
@PIKETechnologies Жыл бұрын
Thank you, Alejandro!
@markt5973 Жыл бұрын
So glad you made these last two videos. ATR is so often taken as the be-all, do-all, go-to method for FTIR analysis. It is a good easy method, but there are some limitations that can really trip you up if you are not aware of them. Thanks for these and all of your videos!!
@PIKETechnologies Жыл бұрын
Thank you so much, Mark! We are delighted to hear our weekly tips help you with your FTIR analysis!
@LaCo1028 Жыл бұрын
This is very informative. Thanks a lot for all the tips you provide weekly.
@PIKETechnologies Жыл бұрын
Thank you so much, Alejandro! We appreciate your kind words.
@mrwhobodiggz Жыл бұрын
Would this have anything to do with the "dust that fell over west virginia virginia and maryland?
@PIKETechnologies Жыл бұрын
😂
@KresoMesarek Жыл бұрын
Hi, I'm following you every week ! Short and informative ! Continue with this great series of videos.
@PIKETechnologies Жыл бұрын
Thank you so much!
@juniormendes264 Жыл бұрын
how to clean a fingerprint mark? 😪
@PIKETechnologies Жыл бұрын
Hi Junior, The answer will depend on the window type you are using. Contact us at piketech.com and we will do our best to help you! ☺
@sathemayur5242 Жыл бұрын
It's really informative and nice video thank you
@PIKETechnologies Жыл бұрын
We're so happy to hear, Sathe! Thank you.
@baker4532 Жыл бұрын
My experience is that ATR correction should particularly be used when acquiring spectra for compounds that contain OH or NH groups as the absorbances for these functional groups will be very low without these corrections.
@senaoral9448 Жыл бұрын
While i working with liquid cell, the surface of the glass became cloudy and it does not go away when wiped. What can i do about it? Thank you
@PIKETechnologies Жыл бұрын
Hi Sena, My guess here is your sample is not compatible with the window material. Perhaps you are using a soluble salt window like KBr or NaCl when there is moisture in your samples, and this is causing the foggy, cloudy window. That said, keep in mind even when a window is a little cloudy you can still get good transmission through it! Even when the window does not look as pretty, it is still usable!
@TheFaveteLinguis Жыл бұрын
Showing the actual reacalcululation would be more useful.
@chenjingye5979 Жыл бұрын
But we use ZnSe window at 750 C for dry reforming reaction. If ZnSe cannot be used over 250 C, what kind of widows can be used higher than 700 C?
@PIKETechnologies Жыл бұрын
Hi Chen, Thanks for the question and watching our Tips. You can find a handy table in our Transmission Theory and Applications Note where we list MP of many IR windows! see below. www.piketech.com/wp-content/uploads/PIKE-Technologies_Transmission_Theory_and_Applications.pdf
@chenjingye5979 Жыл бұрын
@@PIKETechnologies Thanks for your reply. It is very useful!
@camm.4110 Жыл бұрын
Whats a good starting ratio? 95% kbr, 5%sample?
@PIKETechnologies Жыл бұрын
Hi Cam, There are some low-absorbing samples that will require a higher concentration like 5%. I typically start at 1%. If my absorbance bands are too small I bump up the sample concentration. If too big I reduce the concentration. You can learn more about making the perfect pellet recipe here: tinyurl.com/4bymn4wb
@gkbradshaw Жыл бұрын
Do you use different reference standards (diffuse vs specular) when collecting the background signal with and without the specular exclusion port?
@PIKETechnologies Жыл бұрын
Great question! For a background, I used the bottom of our steel aluminum EasiDiff macro cup, which has a flat bottom. It has a ‘machine’ finish but was not a polished surface (probably a little scattering).
@brad616 2 жыл бұрын
I have no clue what spectroscopy is but now im into it
@markt5973 2 жыл бұрын
Cool! Actually, I wasn't going for the pun, very nice accessory!
@PIKETechnologies 2 жыл бұрын
Hehehe thank you very much!
@decalogians9321 2 жыл бұрын
What windows can we use for aqueous samples
@PIKETechnologies 2 жыл бұрын
When choosing a window for IR liquid transmission cells, consider a window with the best solubility, sample pH, spectral range, and I like to stay with a low RI window when possible to minimize fringing in the IR spectrum. You may find that you need to make compromises. You can see window properties in our Theory and Application note, www.piketech.com/wp-content/uploads/PIKE-Technologies_Transmission_Theory_and_Applications.pdf
@decalogians9321 2 жыл бұрын
@@PIKETechnologies Thanks so much
@PIKETechnologies 2 жыл бұрын
@@decalogians9321 anytime!
@TTLDP6491 2 жыл бұрын
Thanks Jenni
@PIKETechnologies 2 жыл бұрын
You are welcome, Caleb!
@Екатерина-ж6д5д 2 жыл бұрын
What about spectra analysis? Kramers-Kronig transform?
@PIKETechnologies 2 жыл бұрын
Thank you for your question! Definitely try the Kramers Kronig transform when you see derivative-shaped bands to make the spectrum appear more transmission-like. For coatings and ultra-thin films on reflective substrates, often the spectrum will already appear like a transmission spectrum, and no transformation is required.
@Екатерина-ж6д5д 2 жыл бұрын
@@PIKETechnologies thank you for the reply! And how one can determine thickness of the film?
@PIKETechnologies 2 жыл бұрын
@@Екатерина-ж6д5д We have a video about this, 3 Things to Learn About Coatings on Reflective Surfaces! kzbin.info/www/bejne/jIKvg4OImKaln6M
@Yooh_The_Pooh 2 жыл бұрын
Just a srsly basic dumb question , ATR is a technique of ftir ?but like if so what are other techniques and how to differentiate ! 😐
@PIKETechnologies 2 жыл бұрын
For FTIR analysis, accessories can be categorized as ATR, Diffuse Reflection, Specular Reflection, and Transmission. Visit our application section of our website where we have posted short summaries of each method. You’ll find these under each header.