I think there are lots of loopholes in your procedure. When you add the chemicals, please consider the oxygen intake; hence dip the pipette below the water surface. Also, how much volume did you take that is needed and titrated with the thiosulfate? might as well show your BOD calculations and chemical reactions of the process.
You uncapped your water sample for quite an extended period of time before adding the manganese sulfate, this will allow oxygen in the room air to enter the sample and change the concentration. Also your water samples were evidently not filled to the top as when you add your reagents they should displace some liquid as you are adding in excess.
I think now a days bod can be determined by hach bar coded kits or incubator based oxitop device as it requires very basic reagents and gives accurate results
If the expected BOD of a sample is in the range 35 mg/L to 85 mg/L, what would be the minimum and maximum sample volumes to use for the sample dilution?
Could I know the concentration of the chemicals that were used? And is starch solution starch in aqueous solution or starch indicator solution? I’m assuming it’s the first one
Thx , it was good presentation but loud music didnt allow to hear well. Also it wd be much better if u provid explanation, ex ( why did u proceed without dilution!?, and if the dilution is required? How to detrmine the factors based on the detection limit of the method? Etc. Thx
Hi if I have a digital DO meter can I conduct a BOD5 by ...1st sample leaves for 5 days in the dark then take the DO reading ...2nd sample direct from the source - take the DO reading then Subtracting the difference in value without going through the titration route?
Is the formula for calculating BOD correct? I'm a little confused because in some places I've read that BOD value = [DO(initial)- DO(final)]× Dilution factor.
I think there are lots of loopholes in your procedure. When you add the chemicals, please consider the oxygen intake; hence dip the pipette below the water surface. Also, how much volume did you take that is needed and titrated with the thiosulfate?
might as well show your BOD calculations and chemical reactions of the process.
one of the best video i have seen on BOD.
You uncapped your water sample for quite an extended period of time before adding the manganese sulfate, this will allow oxygen in the room air to enter the sample and change the concentration. Also your water samples were evidently not filled to the top as when you add your reagents they should displace some liquid as you are adding in excess.
Can you give or tell me BOD total procedure, it's urgent
Your video is very much helpful for me .....Thanks a ton 🙏🏼
I think now a days bod can be determined by hach bar coded kits or incubator based oxitop device as it requires very basic reagents and gives accurate results
Very clear explanation brother... Keep going 💐
Sir, you are a lifesaver!❤️
I learnt, thanks much
If the expected BOD of a sample is in the range 35 mg/L to 85 mg/L, what would be the
minimum and maximum sample volumes to use for the sample dilution?
Addition of wrinkler solutions should be done deep under the water for proper mixing and fixation
Bhut hi jabardast tarike se bataya hai aapne
You should get rid of the air bubble in your burette 😊
Could I know the concentration of the chemicals that were used? And is starch solution starch in aqueous solution or starch indicator solution? I’m assuming it’s the first one
Thx , it was good presentation but loud music didnt allow to hear well. Also it wd be much better if u provid explanation, ex ( why did u proceed without dilution!?, and if the dilution is required? How to detrmine the factors based on the detection limit of the method? Etc.
Thx
Thanks a lot brother
Music kyu lgaya tere Bhai ken shadi the
Nice explanation
How can we determine the bod value from the titrated value
Sir in BOD bottle complete filled with waste water ..
Or waste water +distilled water
Plzz mention quantity of this sample....
Can you share with us the concentration of the reagent in this procedure?
Nice video
Pls lower background noise
should have finished the experiment and calculated the BOD.
What's difference between BOD3 and BOD5 except temperature??
Hi
if I have a digital DO meter
can I conduct a BOD5 by
...1st sample leaves for 5 days in the dark then take the DO reading
...2nd sample direct from the source - take the DO reading
then Subtracting the difference in value without going through the titration route?
Yes, as long as the DO meter is properly calibrated.
@@sirshem9683 thanks this simplify my tasks
you can write the procedure??
Is the formula for calculating BOD correct? I'm a little confused because in some places I've read that BOD value = [DO(initial)- DO(final)]× Dilution factor.
It's right the one u shared, for watching more about bod watch my video, th-cam.com/video/hqr6C6v7DT4/w-d-xo.html
What about COD
Make easier and fastest way to find COD
We cnt see plz
Abe DO bta rhe ho ki BOd
at one moment of time i thought the other one is a girl 😂
where are
the fucking calculations?