condition mean min max 12pM Fe 4.7778225 3.44762 6.108025 58pM Fe 3.984719285714286 3.6985685714285714 4.27087 233pM Fe 3.97934 3.97934 3.97934 1160pM Fe 2.6604376785714283 2.2117225 3.109152857142857 Dark 4.560184666666666 4.10833 5.012039333333333 Light 4.056 4.056 4.056 Phloroglucinol 6.72806 6.72806 6.72806