Question

three replicate determinations of the signals for a standard solution of an analyte at a concentration of 10.0ppm give value of .16, .15, .16( arbitrary unit), respectively. The signal for a method blank was found to be .02. calculate the concentration of analyze in a sample that gives a signal of .12

Answer 1

you need to build a ratio, since concentration is proportional to the signal.

like so: \(\dfrac{10.0 ppm}{0.16}=\dfrac{x\;ppm}{0.12}\)

you just need to solve for x algebraically now.

Answer 2

thanks

Answer 3

no problem