condition mean min max 12pM Fe 15.016675 14.08555 15.9478 58pM Fe 10.852627142857143 9.229954285714285 12.4753 233pM Fe 9.90113 9.90113 9.90113 1160pM Fe 8.76863625 5.8100725 11.7272 Dark 5.9846889999999995 5.25804 6.711338 Light 5.192786923076923 5.192786923076923 5.192786923076923 Phloroglucinol 6.20567 6.20567 6.20567