condition mean min max 12pM Fe 67.124325 62.79535 71.4533 58pM Fe 49.17528571428572 48.79567142857143 49.5549 233pM Fe 35.331 35.331 35.331 1160pM Fe 29.741043452380953 19.579658333333334 39.90242857142857 Dark 48.50819333333334 42.9917 54.02468666666667 Light 47.92641538461538 47.92641538461538 47.92641538461538 Phloroglucinol 44.9526 44.9526 44.9526