Hanna phosphate results

[Gulrez]

Phosphate ULR - 0.24
Phosphate - 0.1

Both are hanna. one is the ultra low result and the other one is the regular one. how should i interpret these results?

 

[Holst]

I would buy a Calibration check set for the ULR and see if it's measuring correct.

Standard Calibration Checking Set Phosphate Ultra LR - HannaNorden

Item no. 774-11

www.hannanorden.se

 

[PatW]

Hanna gives the variation of its results for various detectors.

The low range phosphate is plus or minus .02 ppm. So the result is between .22 to .26.
The phosphate is plus or minus 1 ppm. So the result would be between 0 and 1.1 ppm.

For your concentration, go with the low range detector.

 

[Suohhen]

Hanna gives the variation of its results for various detectors.

The low range phosphate is plus or minus .02 ppm. So the result is between .22 to .26.
The phosphate is plus or minus 1 ppm. So the result would be between 0 and 1.1 ppm.

For your concentration, go with the low range detector.

Your missing one. The ULR is .02, the LR is .04, and the HR is 1. But yeah from what we are seeing it looks like the op has the HR.

 

[Bfragale]

I may be wrong here but does one measure in ppm and one in ppb? Maybe between the conversion and the tolerance is where the different comes in play. Idk. Just food for thought.

 

[Tman007]

I may be wrong here but does one measure in ppm and one in ppb? Maybe between the conversion and the tolerance is where the different comes in play. Idk. Just food for thought.

The Phosphorus ppb checker only shows integers (no decimal), so I don't think that's the issue.
In case anyone needs it, the Hanna conversion table from ppb phosphorus to ppm phosphate is here:

https://www.hannainst.com/hubfs/006...phate-conversion-table--hanna-instruments.pdf

 

[Reef.]

Phosphate ULR - 0.24
Phosphate - 0.1

Both are hanna. one is the ultra low result and the other one is the regular one. how should i interpret these results?

did you use the same water sample for each checker?

did,you use the same vial also?