Hi. I was wondering if someone can explain to me what Atomic Absorption in chemistry-quantitative analysis.?

Question

What is it? I did 2 runs on Calcium- one with 5mL dilution and one with 10mL dilution, and I also ran 5 mL of my unknown, but my correlation coefficient was only .9557. What does this tell me? How do I write in words my results?

Answer 1

it tells you your trendline (correlation) is not precise enough between your standard solutions in linearity.  -1 or 1 is perfect but almost not reachable so 0,9995 is very good to have. So with your correlation coefficient, when you interpolate the sample (cause you have the extinction) the values for the concentration in 5 ml solution will not be precise concentration of the unknown. Did you run controle samples also? You can check variation coefficient (precision)  and the spread (accuracy) also then to give you more information.