condition mean min max 12pM Fe 4.9834 4.61101 5.35579 58pM Fe 2.0611007142857143 1.91819 2.2040114285714285 233pM Fe 1.7794400000000001 1.7794400000000001 1.7794400000000001 1160pM Fe 0.49961892202380953 0.3699595583333333 0.6292782857142857 Dark 11.735584 4.5587 18.912468 Light 6.9658595384615385 6.9658595384615385 6.9658595384615385 Phloroglucinol 27.95 27.95 27.95