Hanna checker vile...?
- Thread starter Wes10C
- Start date
- Tagged users None
madweazl
2500 Club Member
I use a syringe because eyeballing the cuvette is tedious to say the least. If you're eyeballing it, you fill so the meniscus of the water (the lowest point of the concave top of the water) meets the line (the edge of the water in the cuvette will be over the fill line).
MikeRizz88
Community Member
A bubble forms when adding to vile. Maybe a bubble is bad comparison but an under belly maybe lol, make sure the middle of the belly is right at the 10 ml mark. Sides might be taller but hammer themselves say go with the middle at the 10ml mark. Hope this helps
ShepherdReefer
5000 Club Member
I go off the bottom of the meniscus.
jordan9095
Active Member
my 10ml syringe fill up the cuvette to the line
I can understand where that misconception may come from. Example, the calcium checker. You're supposed to put 1ml of reagent into the vial, and then fill it up to the 10ml mark with pure water. Meaning 9ml of pure water. But then some people think they should be adding 10ml, and end up past the line.
And also some people are not aware that you are supposed to be reading the 10ml line at the bottom of the meniscus. Not where the water meets the sides of the vials.
FWIW, my 10ml syringe dispenses exactly at the 10ml mark, bottom of meniscus.
JCTReefer
Valuable Member
Yep, you definitely should be reading from the bottom of the meniscus. I don’t have any experience with the calcium checker. It got terrible reviews so I skipped it. I do use the Alkalinity checker, ULR phosphorus, and copper checker. All of these require you to add 10ml from the get go. Like is said, never really checked the accuracy of the 10ml mark. I’d assume the manufacturer wouldn’t be off. It’s good to know the vials are accurate! Not really sure what the deal was in the other threads. I’d have to go back and check. It’s been a while!!!
rkpetersen
walked the sand with the crustaceans
I use syringes for every test. It is faster, more accurate and more consistent than filling the vial to the meniscus, at least for me.
The calcium checker is fantastic, if you use it properly. I've compared its results to ICPOES results many times and always been impressed with how close they are. You must use 0 TDS RODI water or distilled water. You must measure the 0.1 ml sample exactly with an appropriate syringe. Also a good idea to add the dry reagent to the vial with a small funnel to avoid losing any of the crystals. I use a funnel for all the dry Hanna reagents; perfume funnels work great.
The calcium checker is fantastic, if you use it properly. I've compared its results to ICPOES results many times and always been impressed with how close they are. You must use 0 TDS RODI water or distilled water. You must measure the 0.1 ml sample exactly with an appropriate syringe. Also a good idea to add the dry reagent to the vial with a small funnel to avoid losing any of the crystals. I use a funnel for all the dry Hanna reagents; perfume funnels work great.
As an Amazon Associate we earn from qualifying purchases.
JCTReefer
Valuable Member
That’s good to know!!! Can’t remember all the negative reviews and what they said. I much rather prefer a digital read out. Currently use Red Sea for calcium. It’s pretty accurate, but takes a bit to do the test!
As an Amazon Associate we earn from qualifying purchases.
ReefGeezer
Valuable Member
You will be fine as long as you do it the same way every time.... but... bottom of the meniscus to the bottom of the line for me, but I don't sweat it too much. I think tests are about trends not absolute numbers. As long as your testing procedure doesn't change, you'll see an accurate trend.
Angelwolf21203
Active Member
Go to the BRS website. There's a video on how to get the best results out of them.
Broutilde
Community Member
Not to dig out that old thread but my friend told me the same thing yesterday. I just checked my cuvettes today and indeed 10ml of liquid go above the 10ml line. This is a little bit frustrating...@Hanna Instruments
Are you sure? I have switched over to air displacements pipettes, which I have calibrated myself gravimetrically using a milligram scale. They dispense to exactly the 10ml mark. Remember, bottom of meniscus. Not where the water meets the sides.
92Miata
Valuable Member
Do you have older vials?
I use a syringe to fill mine now, and if I had to guess, I'd put the line at about 8.5 ml.
Either Becton-Dickinson is wrong, or my Hanna vials are. (Vials from ulr phosphate)
