condition mean min max 12pM Fe 4.253415 2.97323 5.5336 58pM Fe 1.8267157142857142 1.40312 2.2503114285714285 233pM Fe 6.8952 6.8952 6.8952 1160pM Fe 2.0546741726190474 1.3878369166666666 2.7215114285714286 Dark 7.317814333333334 2.89883 11.736798666666667 Light 6.051982076923077 6.051982076923077 6.051982076923077 Phloroglucinol 2.93907 2.93907 2.93907