Is it required to purchase carrez solutions? Or we can prepare by following your shared chemicals. Would you pls share carrez solutions preparation method or reference ?
Blank solution of filtered sample ( Honey sample 5ml + sodium disulphite ml ) Kept in Blank slot of spectrophotometer... Filterd sample ( Honey sample 5ml + distilled water ml ) kept in sample slot of spectrophotometer is it right ? ?
@@MicroChemsExperiments If single beam UV-VIS will be used, are we going to read the the absorbance of the blank first then sample solution at 284 nm, then repeat at 336 nm (blank then sample)?
In AOAC 980.23 Official method (1983) there mentioned sodium bisulfite (sodium hydrogen sulfite). But in your video there mentioned sodium disulfite (sodium metabisulfite). What is the difference between two procedure? Kindly can you tell me where it is mentioned sodium disulfite?
No. Only one port is used. Keep sample in one holder setting 2 wavelengths in the operating software. It will measure 2 absorbance of sample one after another
![⭐️( ลอยกระทง 2024 ) Ver. แดนซ์ Remix BY [ ดีเจกิต รีมิกซ์ ]](http://i.ytimg.com/vi/rMWOLhgXUHc/mqdefault.jpg)
One chanal Which I really like.
That's it.
Very useful your all videos are very useful and important.
Thanks lot ❤️
Thank you so much. We are so glade
Thanks a lot. Would you please share the reference which you followed?
I have a question, why do we have to reject the first 10 mL of filtrate? Thank you!
Great video!
mind telling, in HMF formula what's 149.7 x 5 ?
Calculation factor
@@MicroChemsExperiments why are we even multiplying that? can you explain a bit, what quantity is that, mass, volume of numeric?
Can you make a video on HMF of honey by winker method????
Is it required to purchase carrez solutions? Or we can prepare by following your shared chemicals.
Would you pls share carrez solutions preparation method or reference ?
You can prepare. Reference: AOAC 980.23
@@MicroChemsExperiments
Thanks. Would you pls share the Reference: AOAC 980.23
@@palas987654321 Sorry. We don't provide any document.
Kindly make video on Fiehe’s test for honey
Noted
Is this only for honey testing or can it be used for testing HMF levels in juice?
Only for honey sample but you can try for juice
Blank solution of filtered sample ( Honey sample 5ml + sodium disulphite ml )
Kept in Blank slot of spectrophotometer...
Filterd sample ( Honey sample 5ml + distilled water ml ) kept in sample slot of spectrophotometer
is it right ? ?
Do test according to this video.
Hi, Any Video available for Honey diastase activity testing??
Thanks
Yes, soon
@@MicroChemsExperiments Any honey diastase activity video available now??
This suitable for double beam spectrophotometer
Yes
Hi. I want to ask, can we use single beam UV-VIS spectrophotometer for this ? Is the reference necessary? Thank you in advance!
You can
@@MicroChemsExperiments If single beam UV-VIS will be used, are we going to read the the absorbance of the blank first then sample solution at 284 nm, then repeat at 336 nm (blank then sample)?
Can we replace deionized water with distilled water?
Using DI WATER is better. But you can also use DW
In AOAC 980.23 Official method (1983) there mentioned sodium bisulfite (sodium hydrogen sulfite). But in your video there mentioned sodium disulfite (sodium metabisulfite). What is the difference between two procedure? Kindly can you tell me where it is mentioned sodium disulfite?
Sodium Disulfite and bisulfite are same in chemical composition. So, do not panic with it.
Excellent
Thank you
How the absorbance can be measured in two wavelength? Keeping reference in blank and test sample in next port?
No. Only one port is used. Keep sample in one holder setting 2 wavelengths in the operating software. It will measure 2 absorbance of sample one after another
@@MicroChemsExperiments thank you
why carrez solution is necessary in this procedure?
To enhance the HMF content to be determined
Please explain how absorbance of sample soln is changed from 284 into .284 and 334 into .004
You have to set two wavelengths during method setup
I want to ask, why use two wavelengths on this test?
Because Kries method said so
@@MicroChemsExperiments the kries' method of testing oil delicacy?
@@tyasayuwulandari7854 Sorry. I made a mistake. This video is made by following AOAC 980.23. So, AOAC 980.23 said to use two wavelength
How does the principle of hydroxsymmetilfurfural analysis use spectrophotometri?
@@tyasayuwulandari7854 Please read the AOAC method for more.
Why absorbance is measured for these wavelenghts 284 and 336nm? (I can't find AOAC 980.23 on internet)
Plz check the latest version of AOAC properly
Super
Thank you
11:48
Any problem here?