Think you realise now why you have gone wrong...couple of tips, use the same tube each time, as the glass is different on the vials, put the vial into the checker the same way around each time, I line up the writing on the vial with the writing on the checker, I store the vials full of rodi water and keep them in a little tub full of rodi water, I never use tap water to rinse them out, always rodi water.
Hanna Phosphorus checker jumps around
- Thread starter Robert Binz
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Think you realise now why you have gone wrong...couple of tips, use the same tube each time, as the glass is different on the vials, put the vial into the checker the same way around each time, I line up the writing on the vial with the writing on the checker, I store the vials full of rodi water and keep them in a little tub full of rodi water, I never use tap water to rinse them out, always rodi water.
You misunderstand. What he is doing is to first analyze the sample the way i should be. Fill sample. calibrate to C2. Put in reagent. Shake 2 minutes - back with the vial and a long press - wait 3 minutes and read. But after this he take the other vial with a blank sample - calibrate to C2. switch to the reacted sample - and press quickly - instant reading. Here it is not a need of waiting 3 minutes because the colour is already there. After this he repeat this until there is 10 readings. This is an example from me using that method
Sincerely Lasse
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