condition mean min max 12pM Fe 1.36551 1.3152 1.41582 58pM Fe 0.6899532142857143 0.6282344285714285 0.751672 233pM Fe 0.117293 0.117293 0.117293 1160pM Fe 0.43507651785714285 0.12543975000000002 0.7447132857142857 Dark 2.5427369 1.8645438 3.22093 Light 1.0660174615384614 1.0660174615384614 1.0660174615384614 Phloroglucinol 0.475809 0.475809 0.475809