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What Differentiates Humic and Fulvic Acids?

By Richard Lamar, PhD
Director of Humic Research
Bio Huma Netics, Inc.

For centuries, humic acids (HA) were thought to be composed of much larger molecules than those found in fulvic acids (FA). However, the application of Fourier-transform ion cyclotron resonance mass spectrometry (FT-ICR MS), which separates molecules on the basis of molecular weight, demonstrates that the molecular weights of the two fractions both fall in the range of 200–800 Daltons (Da), with most of the molecules having molecular weights in the range of 200–400 Da (Figure 1). To give context, carbon (C) weighs 12 Da, oxygen (O) weighs 16 Da, and hydrogen (H) weighs 1 Da. Thus, phenol molecules (an aromatic organic compound, also called carbolic acid), which have 6 C, 1 O, and 11 H atoms, weigh 99 Da. [Read more…]

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