To build a calibration graph for determining the potassium content, 5 samples with a known potassium content were taken and their activity was measured. In doing so, the following results were obtained:
Sk, % 10.01 15.05 30.04 40.00 52.44
A, imp/min 346 520 1030 1374 1800
Calculate the percentage of potassium in the samples under study, if the following results were obtained when measuring their activity:
samples 1 2 3 4 5 6 7 8
A, imp/min 220 1160 930 400 620 1480 802 484
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