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- Sep 5, 2017
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There is a huge multiplier on calcium in the blank (supposed to be none), making even a trace of calcium look like a lot of calcium in the blank that gets subtracted out from the actual sample result, and that may be why so many people have issues with the calcium checker.
I remember this being a problem for a while. They include a fixed volume 100uL pipette with the kit now so the sample volume is much more consistent and (presumably) accurate. I've used a friend's checker without the fixed volume pipette previously and had issues with accuracy and consistency, but I haven't had issues with the fixed volume pipette.