Help with Hanna alk test

[Chiefmaster30]

Trying to make sure I’m using my new Hanna checker correct. They say to use exactly 1.0 ml of regeant but... it doesn’t really specify where that’s at on the syringe. I’m assuming I fill syringe to where the marks stop. Is this correct? And... I always end up with a small air bubble in the syringe. Is this normal and correct or am I doing something wrong? Thanks!

 

[Denisk]

Yes that is correct but there is suppose to be an additional tip that you attach to the syringe.

 

[Jason mack]

Hello , yes the bubble in the syringe is normal, you want too have the bottom of the plunger at the 1ml mark

 

[Chiefmaster30]

Yes I have that but when I put it on there it fills it foirst. Am I supposed to fill the tip and the syringe to the 1.0ml line

 

[Chiefmaster30]

So it’s supposed to look like this when I’m done?

 

[miPapareef]

So it’s supposed to look like this when I’m done?

Yes exactly like that

 

[DSC reef]

That's correct

 

[Chiefmaster30]

Thanks for fast responses! I’ve been doing it wrong all week. Lol! I haven’t been using the tip. The instructions don’t mention the tip

 

[Chiefmaster30]

Thank y’all a lot! It’s actually not real far off from what I got the way I’ve been doing it. I’ve been getting 8.7 now I got 8.8dkh.

 

[DSC reef]

Love the Hannah alk kit. Makes it so much easier. I was actually bummed when reagent was out of stock and I thought I'd have to use titration and swirl again. Spoiled!;Hilarious

 

[Kyl]

Something else to keep in mind with the Hanna checkers, don't use two cuvettes for the same test at once. Some will fill one with tank water and pre-mix a second one to make it easier, but variations in the cuvette glass can cause miss-readings.

 

[bhuyett]

You don’t have to use the tip. With it on or off you are still only putting 1ml in the syringe. So long at the bottom of the plunger is at the 1ml mark.

 

[McArcher]

I have an additional question.
If I measure out exactly 10ml using a syringe, it goes past the mark on the cuvette. Should I use the mark on the cuvette or 10ml as the instructions say?

 

[bhuyett]

The water isn’t going above the line it actually called Capillary Action (surface tension) where the water on the sides climbs up the glass tube. As long as you look at the bottom of it crosses the line you are good to go.

 

[McArcher]

The water isn’t going above the line it actually called Capillary Action (surface tension) where the water on the sides climbs up the glass tube. As long as you look at the bottom of it crosses the line you are good to go.

I am aware of capillary action. What I’m saying is that when I put 10 measured milliliters from a measuring syringe into the cuvette, the bottom of the meniscus is probably 1-1/2 mm above the line

 

[DSC reef]

We always just fill to the line in the curvette.

 

[Chiefmaster30]

We always just fill to the line in the curvette.

Do y’all use the syringe to fill with the sample water?

 

[DSC reef]

Yes we do.

 

[bhuyett]

I use a 10ml syringe to fill with and use the packaged syringe to fill with testing solution.

 

[BantyRooster97]

When I use a 10 m syringe to fill my curvette it goes above the line by a bit. So I usually just fill to the line and stop.