condition mean min max 12pM Fe 16.730125 11.847249999999999 21.613 58pM Fe 13.835571428571429 12.095842857142857 15.5753 233pM Fe 13.3753 13.3753 13.3753 1160pM Fe 19.059304761904762 13.959042857142856 24.159566666666667 Dark 12.597105 8.68955 16.50466 Light 13.265733076923077 13.265733076923077 13.265733076923077 Phloroglucinol 13.35404 13.35404 13.35404