Phosphate test results . Hanna vs ICP

[Nicksreef2022]

Hi guys , I just recently got my Icp test results back . What I did was, I wanted to find out how much different the values of my test kits vs Icp . So I did a test on the same day and time I filled the ICP tubes to be sent for testing. So my phosphate from the Hanna ULR gave me 0.08 ppm . When I got the ICP results it came back as 0.04 ppm . So my question is moving forward, do I take off 0.04 ppm from what ever results I get from my Hanna Checker ?

 

[F4u-SuperCorsair]

How do you know the ICP test is accurate?

 

[aSaltyKlown]

Accuracy is ±0.02 ppm for the Hanna. What is the ICP accuracy? I'd say you're in the ballpark and don't worry too much if it is under .1 and above .03.

 

[vadryn]

My Phosphate is consistently hovering at .2 ppm on Hannah but my last ICP Analysis came back zero - so I don't trust the ICP. :-/ I would have believed almost anything... except zero. Next ICP will be ATI...

 

[CasperOe]

Aa long as you're consistent with your Hanna checker, I'd avoid adding or removing anything Just make sure you use exactly 10 ml of water every time.