condition mean min max 12pM Fe 0.809895 0.0 1.61979 58pM Fe 0.186975 0.0 0.37395 233pM Fe 0.0 0.0 0.0 1160pM Fe 0.04696375 0.0 0.0939275 Dark 1.0666436666666665 0.0 2.133287333333333 Light 0.18059076923076922 0.18059076923076922 0.18059076923076922 Phloroglucinol 0.35613 0.35613 0.35613