hanna phosphate checker defect?

jarviz · Mar 23, 2021

I was trying to test my phosphates this morning with my ULR hanna checker. when i placed the powder in the test vial. i noticed some of the powder turning into a brownish rust color. it wasn't all of the powder though, like just a small cluster or chunk of it. Is this normal or do i have a bad batch?

Dan_P · Mar 23, 2021

jarviz said:
I was trying to test my phosphates this morning with my ULR hanna checker. when i placed the powder in the test vial. i noticed some of the powder turning into a brownish rust color. it wasn't all of the powder though, like just a small cluster or chunk of it. Is this normal or do i have a bad batch?

Not normal. The powder should stay colorless and dissolve pretty quickly.

Did you repeat the test to see if it happened again? The sample or test vial might have been contaminated.

jarviz · Mar 24, 2021

Dan_P said:
Not normal. The powder should stay colorless and dissolve pretty quickly.

Did you repeat the test to see if it happened again? The sample or test vial might have been contaminated.

It happened two out of the last three times. The first 10ish times had no problems.