Our organization is dedicated to the development and manufacture of superior humic substances products. It is our opinion that veracity in the reporting of humic substance content is of extreme importance. Recognizing a gap in the methods to accurately assay for fulvic acid materials, the Humic Products Trade Association (HPTA), in coordination with the International Humic Substances Society (IHSS), developed a testing method for the determination of the hydrophobic fulvic acid fraction of humic substances products. This method was first published in the Journal of AOAC International. It has since been approved by the American Association of Plant Food Chemist Officials (AAPFCO) and published by the International Standards Organization (ISO) for international recognition and use.

As part of our commitment to product quality, we are pleased to recognize the HPTA method, commonly referred to as the Lamar Method, as the new standard for identifying the hydrophobic fulvic acid fraction of humic substances.


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