Hanna alk test kit reagent debris

[Spitty]

I wasn’t sure where to post this question but I’ll do it here. I was doing some alk tests this morning and noticed debris floating in the test vial after adding the reagent. Figured it was out of date reagent, checked the expiration date, 9/20/20. Anyone else have this happen? Is the reagent trash? Are the tests still reliable with chunks floating in the vial?

 

[esther]

Maybe it's the dry parts of the reagent that get crusty around the edges of the bottle? Following along as I use the same test kit.

 

[BigHildy53]

The test is not accurate with debris in the vial. It may effect the light passage. I've had this happen when I didn't clean the syringe out after usage.

 

[Spitty]

I do clean the syringe tip by spraying with rodi water after use. I did one test with my old reagent, it read 7.8. I then opened a new bottle of reagent, performed another test and it read 8.0

 

[deftonead]

I see little chunks of debris floating in every bottle of reagent i have ever purchased... up to maybe 20 bottles. Ive found that as long as i do not shake the bottle before i use it the debris will stay at the bottom and out of the vials.

 

[MTBake]

I've seen debris in every bottle I've used. Went back to Salifert but not because of this. I just prefer titration tests.

 

[Spitty]

I was wondering whether or not the bottle should be shaken........thought maybe a good shake would get rid of the debris, no go

 

[Sweet Reef Corals]

I do clean the syringe tip by spraying with rodi water after use. I did one test with my old reagent, it read 7.8. I then opened a new bottle of reagent, performed another test and it read 8.0

That is within the noted tolerance which is +/- .4 I believe. I have noticed pretty wide differences between bottles of alk reagents with different lot numbers. Just my experience....