I came across a deal on a nice handheld refractometer a while back and bought it to use in brewing, but I'm finding it super helpful in verifying purity of solvents extracted/distilled from consumer products. Basically I'm finding out that vigreux columns are pretty limited.
That's interesting. I thought they work as good as it is told in the labs. I also tested a small sample of selfmade chloroform and found out that it was quite far from pure, even after distillation.
If Alpha T is critical angle of sample liquid then how total internal reflection can occur because there is denser reflecting prism in front of rarer liquid sample
Sorry I made a mistake. Search on google Lorentz - Lorentz equation of molecular refractivity, table of atomic refractivity of Eisenlohr. Not parachor.
I have found a book, 100% readable on google books. books.google.it/books?id=UnaAKa6CP7IC&pg=PA8&lpg=PA8&dq=atomic+refractive+eisenlohr+table&source=bl&ots=HIq02-xes7&sig=Ms1MI9evhVB81NjVY2RtsSYgu30&hl=it&sa=X&ved=0ahUKEwi74uqQv_HVAhUJRhQKHX46Cb4Q6AEIZTAN#v=onepage&q&f=true
It's a polish manufacturer called PZO. This model is RL2, but they don't have any information about it on their page. The oldest manual they have is about the RL3, which seems to be quite similar, but they're selling the RL4 today.
YOU SHOULD HAVE USED PLASTIC DROPPER TO PROTECT PRISMS FROM SCRATCHING WHY IS IT IMPORTANT TO GET "X" IN BETWEEN LIGHT AND DARK ? HOW DO YOU GET RI OF GEMS ?
The prisms are generally made of fused silica or quartz, and both of those are harder than glass, so it's unlikely that you will scratch the prism with a Pasteur pipette, as they are made from very soft glass. He answers your first question at about 1:10. For gems you use a different instrument, often a laser refractometer. Source: I am a glass chemist.
Alpha t is the critical angle of total reflection. When the angle of the light hitting the surface of the refracting prism gets to alpha t and above it, the light is reflected completely. If it's below alpha t the light is transmitted through the surface.
How can light be reflected back to liquid from a refracting prism because a refracting prism is denser than a sample liquid.... And total internal reflection only takes place when there is a rarer medium in front ... Please 🙏 Ans
Thank you for this upload. It helped a lot.
Thanks so much,, you just gave me a head start,,,
I appreciate this
Thanks!! we use this in determining refractive index of minerals in geology
I came across a deal on a nice handheld refractometer a while back and bought it to use in brewing, but I'm finding it super helpful in verifying purity of solvents extracted/distilled from consumer products. Basically I'm finding out that vigreux columns are pretty limited.
That's interesting. I thought they work as good as it is told in the labs. I also tested a small sample of selfmade chloroform and found out that it was quite far from pure, even after distillation.
thank you for explaining❤
nice its been some time since i used this great piece of equipment thou
Thank you, nice video
I want to know if i can use it for a thin piece of glass
I bought a refractometer because of this video.
Haha. It can be pretty useful! :D
Can i measure ri of starch n caco3 non coated with abbe refractometer??
may i know what is the goal for the experiment you show ?
An Abbe refractometer is an instrument to determine the index of refraction of a liquid between two high-index glass prisms.
very helpful . from Pakistan
You're welcome! :)
If Alpha T is critical angle of sample liquid then how total internal reflection can occur because there is denser reflecting prism in front of rarer liquid sample
Is the extra additiin of water will change the result?
Thanks a lot!
You're welcome :)
What is name of the liquid that use in reflectometer?
thanks. Do you know that by density and refractive index you can investigate the structure of a compound ?
I have only read that you can guess some of the funtional groups due to a high or low refractive index. Or are there other methods?
Random Experiments International there are ! Search for Eisenlohr equation, molar refractivity, parachor on Google
Sorry I made a mistake. Search on google Lorentz - Lorentz equation of molecular refractivity, table of atomic refractivity of Eisenlohr. Not parachor.
I have found a book, 100% readable on google books. books.google.it/books?id=UnaAKa6CP7IC&pg=PA8&lpg=PA8&dq=atomic+refractive+eisenlohr+table&source=bl&ots=HIq02-xes7&sig=Ms1MI9evhVB81NjVY2RtsSYgu30&hl=it&sa=X&ved=0ahUKEwi74uqQv_HVAhUJRhQKHX46Cb4Q6AEIZTAN#v=onepage&q&f=true
Nice information
refractometer ka scale nhi dikh rha he kya problm ho skti he??
كيف يمكن الحصول على الجهاز وهل يستخدم ضوء الشمس ام ضوء الصوديوم
Thanksss
What is the manufacturer of that refractometer?
It's a polish manufacturer called PZO. This model is RL2, but they don't have any information about it on their page. The oldest manual they have is about the RL3, which seems to be quite similar, but they're selling the RL4 today.
Good
This vid is great but every time he says "determined" another year is cut off from my life
That's a lot of years... I'm sorry.
@@RaExpIn Don't be, I'm thankful
YOU SHOULD HAVE USED PLASTIC DROPPER TO PROTECT PRISMS FROM SCRATCHING
WHY IS IT IMPORTANT TO GET "X" IN BETWEEN LIGHT AND DARK ?
HOW DO YOU GET RI OF GEMS ?
The prisms are generally made of fused silica or quartz, and both of those are harder than glass, so it's unlikely that you will scratch the prism with a Pasteur pipette, as they are made from very soft glass. He answers your first question at about 1:10. For gems you use a different instrument, often a laser refractometer. Source: I am a glass chemist.
What is alpha t?
Alpha t is the critical angle of total reflection. When the angle of the light hitting the surface of the refracting prism gets to alpha t and above it, the light is reflected completely. If it's below alpha t the light is transmitted through the surface.
How can light be reflected back to liquid from a refracting prism because a refracting prism is denser than a sample liquid....
And total internal reflection only takes place when there is a rarer medium in front ...
Please 🙏 Ans
Thanks a lot! My lab manual is piece of garbage.
Thank you for this upload. It helped a lot.