Apex PO4 Phosphate conversion for ULR hanna checker

[defasum]

I have been testing my PO4 with the ULR hanna checker and inputing the results into my apex. I'm no math expert but I don't understand the conversion the apex automatically does from ppb to ppm. Can someone please help me understand?

if my hanna returns a reading of 20 ppb, I would expect the conversion to be .020 ppm. so why does the apex convert the 20 ppb to .06 ppm?

 

[Calm Blue Ocean]

Here's the conversion table from Hanna:

Phosphorus to Phosphate Conversion Table

 

[defasum]

I understand now. my result is a phosphorous reading and I am converting it to a phosphate reading. it's not a same-to-same conversion.

Thanks @Calm Blue Ocean

 

[Gtinnel]

The reason why it's not just diving by 1000 is because the checker is checking ppb of Phosphorus and not phosphate. So to change phosphorus to phosphate you have to multiply by 3.066 (20x3.066=61 roughly) so it's now in ppb of phosphate. Then you take that value and divide by 1000 to change it to ppm (61÷1000=.06).

 

[Gtinnel]

I understand now. my result is a phosphorous reading and I am converting it to a phosphate reading. it's not a same-to-same conversion.

Thanks @Calm Blue Ocean

Ah I guess I posted a minute too late, but yes that exactly why.

 

[Calm Blue Ocean]

I understand now. my result is a phosphorous reading and I am converting it to a phosphate reading. it's not a same-to-same conversion.

Thanks @Calm Blue Ocean

No problem. I actually had no idea that the Apex would do the conversion for you so I learned something, too! Might be the final push I need to move my testing data to my Apex.

 

[Gtinnel]

No problem. I actually had no idea that the Apex would do the conversion for you so I learned something, too! Might be the final push I need to move my testing data to my Apex.

You may have known but for titration tests you can also just put in the amount of reagent used and it will convert them too. I now enter all of my test results into fusion.