condition mean min max 12pM Fe 0.08317525 0.0 0.1663505 58pM Fe 0.0 0.0 0.0 233pM Fe 0.13577 0.13577 0.13577 1160pM Fe 0.018216357142857142 0.0 0.036432714285714284 Dark 1.8102244 0.45854880000000003 3.1619 Light 0.4258898461538462 0.4258898461538462 0.4258898461538462 Phloroglucinol 0.068344 0.068344 0.068344