Quote:
Originally Posted by homer1475
When I see red to blue I stop. Salifert ALK kit gives the same exact number as a hanna. If I continued to add until it stopped turning back My alk would be off the scale.
Directions do not say to keep adding until the color stops(even though this is non typical for titration kits). The directions say to stop as soon as the color change is noticed.
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Directions needlessly clarify not worrying about bubbles at the top of the titrating syringe, tell you not to drink the chemicals, and other stupid things. The instructions look like they were written by a 5th grader for use by a 2nd grader.
If I follow the directions literally, I stop when the color starts to change, not when it stops. But I have to wonder if this is correct.
I got 7 replies from people who seem less than certain of the correct endpoint, but all seem smart enough not to drink reagents. The instructions need work.