condition mean min max 12pM Fe 0.989642 0.360829 1.618455 58pM Fe 0.7540815714285714 0.106426 1.4017371428571428 233pM Fe 0.727098 0.727098 0.727098 1160pM Fe 0.8519667023809524 0.41627057142857143 1.2876628333333333 Dark 0.5721569666666667 0.390889 0.7534249333333334 Light 0.37702953846153847 0.37702953846153847 0.37702953846153847 Phloroglucinol 0.882945 0.882945 0.882945