Test kit problems. anyone else

[TMNZ]

Hi

I have a calcium kit that gives me a result of 410.

When i use the strontium kit it says my calcium is at 320 (about)

I have repeated the test 5 times and get the same results.

I know it is hard to test for strontium but would you not think the calcium would be the same.

Why is there such a difference?
Am i doing something wrong?
Is the test old, exp date is all good.

Habib

Did you add the 1 full syringe of Sr-3 before starting with the second syringe?

If so then the batch numbers of the Sr-3 and Ca-3 (from the reagent's labels) would be helpful.

Yes i did.

If so then the batch numbers of the Sr-3 and Ca-3 (from the reagent's labels) would be helpful.

str pc1710

ca ac08980e

Regards