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You are doing a typical AA ( atomic absorption spectroscopy analysis)

What you dont know is that the standard calibration curve is incorrect you have made your concentration twice as concentrated.

For exable you believe that you have 2,4,6,8 ppm but actualy you have 4,8,12,16

The curve that you have is completely linear and pass at (C=0).

You are not allowed to go to you merk index or any table for that matter to check the molar absoptivity.

Now how can I look at the concentration I have written and look at my abs and know that I have made all of my standards incorrectly?

( remeber line is linear and passes through 0 line but all your standards are wrong twice as concentrated)

I was thinking you know your usualy A = epsilon*b*c

A1+A2+A3/C1+C2+C3 = A1/C1

But for some reason I I find something that works and I go to proove it and it doesnt work again. ( no matter what Im always reduced to solving the problem using molar absoptivity from a text book or a table)

What other way is there to solve this problem I can feel the answer but for some unknown reason I cant seem to put it on paper.

I would greatly appreciate some help on this and if you can make diagrams that would be the best. Thx