condition mean min max 12pM Fe 19.1484275 11.409755 26.8871 58pM Fe 7.425920714285715 5.215011428571429 9.63683 233pM Fe 4.75882 4.75882 4.75882 1160pM Fe 7.208938077380953 1.4932475833333334 12.924628571428572 Dark 9.680212 6.63653 12.723894 Light 8.615737692307691 8.615737692307691 8.615737692307691 Phloroglucinol 1.648404 1.648404 1.648404