condition mean min max 12pM Fe 36.518675 28.99695 44.0404 58pM Fe 21.58117142857143 13.712442857142857 29.4499 233pM Fe 16.8275 16.8275 16.8275 1160pM Fe 15.115142202380952 5.320755833333333 24.90952857142857 Dark 16.709715000000003 11.56783 21.8516 Light 11.447371153846154 11.447371153846154 11.447371153846154 Phloroglucinol 3.78469 3.78469 3.78469