More granular measurement of TA

[ITR]

Is there a way to measure TA in a more granular way other than in increments of 10? Can I take 50ml of water and double the amount of each of the drops and get a measurement graduation that is in 5ppm? Not sure if this is a linear scale or not, but I'm looking for something a bit more accurate than 10ppm. (Yeah, overkill, I'm sure, but trying to understand the chemistry a bit better. TF-100 test kit, btw.

 

[smackdab]

You can use a 50ml water sample. You'd have to have your own beaker that goes to 50ml.

Add 4 drops of R-0007.
Add 10 drops of R-0008.
Each drop of R-0009 counts as 5 ppm TA.

 

[duraleigh]

Waste of time. the precision of that test is plus or minus 10 ppm......regardless of the sample size.

For pool needs, TA has a very wide range to begin with so the test meets pool standards just fine but it will not do better than 10 ppm.

 

[ITR]

Thanks Smackdab. Just validate my think. And yes, I have a graduated cylinder that goes up to 100ml.

Appreciate the reply duraleigh. This was more for my own understanding than any need. I loved science in school, but haven't had a need to use Chemistry in real life in over 30 years. Trying to figure everything out all over again is...dare I say...fun. Good to know I was thinking about this straight.


Sent from my iPhone using Tapatalk

 

[JoyfulNoise]

This thread has a good list of the modifications you can make to the drop counts of the various tests to get different precision - Water Testing - Precision vs Saving Reagents

Just remember that the testing tolerances change with different levels of precision.

 

[ITR]

Wow...that was a good read. Thank, Matt!