The Winkler Method
HTML-код
- Опубликовано: 21 май 2012
- Learn how to measure dissolved oxygen content using the Winkler method. The LaMotte® Dissolved Oxygen Water Test Kit used in this video can be found at www.carolina.com/environmenta... . Visit www.carolina.com to learn more!
The presentation was awesome. Easy to understand, thanks a lot.
Helped me a lot in my exams.. Make more of this
it helped me a lot during ma exams tqs alot!!!
SMART demonstration. Thank you.
Thanks, this will be useful for my class.
Thanks for the easy to follow presentation.
I truly like this presentation. God bless you Miss Berkeley
Thank you so much for this video it really helped in understanding the concepts clearly
thanks really helped good for revision before lab exams
Awesome explaination!
what a powerful presentation. that presentation is clear and precise. thanks
fine and the presentation is good
just. best subtitle everrrrrrr
Who else is here after Dulan Sir’s recommendation? 😁
Dulan Maduranga. 🙂🇱🇰😍
Who is that?
@@disrespecttha5 Our chemistry teacher🥰
@@elitegamer4705 ia?
what are the concs of both manganese sulfate and the alkali iodo azide solutions
Do This kit suitable to bring during site sampling.. ?? I mean how long do it take for one measurement to complete.. Is it can reach to 20min(if required long time titration)
Thanks a ton...!!
this presentation very nice
thanks a lot!!
a lot of thanks
awsm..easy to understand
Thank you!!
Is there a replacement for maganese sulfate?
In the 3:25, after adding the acid, the bottle contains some fraction of the initial iodide ions and some iodine molecules. Is that what it makes it look orange?
may I ask what is the chemical formula of Alkali-iodide-azide? Thanks for the response
What factors affect amount of DO in water?
Clearly precised👌 Thanks
Watch this video with the subtitles on... so funny! =)
nice presentation
Thank you 💌
Thank you so much
😍
Thank u Ma'am
Nicely done presentation; but curious about how your sample came to 14ppm when that is saturation point for fresh water sample at 0C..... didn't look like you were freezing!
I understand there are controversies about Winkler method.
thanks!
Good job keep it doing
Loved it
Watching from November 2021❤️🔥❤️🔥
Manan Suhail
1 second ago
the initial value of DO can be calculated by this method but can we calculate final DO by this method? if yes then how?. I have read that final DO is find by placing the sample in an incubator for 5 days
Thats a method for calculating BOD(Biological lxygen demand)
thanks
Does anyone know how did she get that each 0.1 ml thiosulphate is equal to 1 ppm DO?
thank u
Nice explanation friend
But in India we use conical flask and burrete
what is the molarity of the sodium thisulfate? 10mmol ?
What is importance of DO?
You're BM is so loud and please put the materials and apparatus used in the description
Vey easy to follow and understand. Thanks a lot
kl zag
What happens to the DO results if you add too much Starch Indicator? I was in the field and my dropper was missing from my Starch indicator solution so I had to improvise. I ended up getting a DO that was typical for a stream, but I am just curious if I need to go to the site and resample? Thank you and great video presentation!
Yes, go back!
What is Winkler method? How it is better than other methods?
welcome
its MnO2 and not MnOH2 incase of brown precipitate
Subtitles are needed
What does it mean when the sample does not turn blue after adding starch?
no Iodide is present in the solution
Amazing! Thank you so much.
At 2:53 what is the name of the product formed? And what is the formula?
It's manganese sulfonate, I'm pretty sure the formula is Mn(SO4)2
+Zade Johnston thank you!
ascent is not that clear though but good work
Show the sample drip like that? You just added sulfuric acid.. 😮
ChemLab HAU, where you at?
So cute☺
Que pena que no explique en español
Love the presentation but frankly speaking you can be a huge distraction in my NO NUT NOVEMBER XDXD
❤️
Wrong, 1 ml of Sodium Thiosulphate = 1 mg/l of Dissolved Oxygen
Haiii ☺️ can u put subtitles 😁☺️
please 🙏☺️😁😁
Who is here after Dipro vaia's recommendation
I was wondering why she says "manganate sulphamate" instead of "manganese sulphate"... but then I've remembered she says to use gloves and goggles for this. -_-
Typical nervous nelly you don't want in a lab. This method is routinely done and calling for such strict safety is a laughing matter. It's not mercury salts or concentrated nitric acid...
Ha, dinosaurs roamed the Earth when this method was used. Nobody else uses this Winkler Method on GLP settings , unless prior calibration for older membrane tech. especially in Commercial Laboratory, It used back in early 1970s to 1980s prior to Ion Specific Ion meters , Dissolved O2 Technology. Good for a learning lesson using classical wet chemical analysis, but not for day to day use.
You're gorgeous
The person in the back was creepy.🙄
Ok sorry but she looks like Leah gotti 😐....,btw thanks mam
Shite
Wow..she is cute
Avinash Meena the one in the back not saying anything?
I hate chemistry , i just don't understand chemical equations.
it helped me a lot during ma exams tqs alot!!!