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.c... . Visit www.carolina.com to learn more!
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?
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)
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
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.
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!
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.
